HP 175A Service manual

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OPERATING AND SERVICE MANU'AL

MODEL

SERIALS

PREFIXED:

175A

235

OSCILLOSCOPE

4

-

01526-1

Copyrieh)

1501

PAOt

HtWLtIT-PACKARO COMPANY

MILL

ROAD,

PAL0

ALlO,

0

CALIFORNIA,

1963

U.S.A.

Printed:

FEB

1963

Table of Contents Model 175A

Section

I

GENERALINFORMATION

1.1

.

Description

1.3 . Auxiliary EquipmeQt

1.5

.

Instrument Identification

1.7

.

Warranty

1.9

.

Special Features

1.11

.

Cathode-Ray Tube

1.13

.

Special Controls

I1

INSTALLATION

2.1

.

Incoming Inspection

2.2

.

MechanicalInspection

2.4

.

Performance Check

2.6

.

Installation

2.8

.

Rack Mounting

.

2.10

2.13

2.15

2.17

m

OPERATION

3.1

3.3

3.5

3.7

3.9

3.11

3.13

3.15

3.17

3.18

3.20

3.23

3.25

3.27

IV

PRINCIPLES

4.1

4.9

4.11

4.13

4.15

4.17

4.19

4.21

4.23

4.25 . Sweep Generator

4.27

4.30

cooling

.

Power Requirement

.

Safety Power Cable

.

Repackaging for Shipment

.............

.

General

.

Triggering

.

. .

.

Sweep Controls

.

. .

Horizontal Functions

.

Intensity Modulation

.

Overall FunctionDescription

.

Vertical Amplifier

.

. . . . .

.

.............

Beam Finder Calibration

Trigger Trigger Level Trigger Slope Sweep Mode

Sweep Time Sweep Magnifier

Step-by-StepProcedures

OF

Cross-Coupled Cathode Follower. 4-2 Differential Amplifier

Peaking

Sync Amplifier Delay Line Circuit Protection Scan Output

Trigger Generator SweepGeneratingcircuits

TABLE

*

...

Page

1-1 1-1 1-1 1-1 1-1

1-4 1-4 1-4

2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1 2-1

3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1 3-1

4-1 4-1 4-1

4-2 4-2

4-2 4-2 4-1 4-2 4-2 4-2 4-3

*

* . * *

...........

.......

....

...........

........

.......

........

............

.......

.....

......

..........

.........

............

......

.......

.....

.........

..........

...........

Source

........

.........

..........

.........

..........

........

.......

....

OPERATION

.

* . *

........

.....

............

........

..........

.......

..........

.........

......

OF

CONTENTS

Section IV PRINCIPLES OF OPERATION (Cont'd)

4.38

.

Single-Sweep Operation

4.40

.

4.43

4.47

4.51

4.53

4.55

V MAINTENANCE

5.1

5.3

5.5

5.7

5.9

5.11

5.14

5.20

5.21

5.22

5.23

5.24

5.25

5.27

5.29

5.31

5.33

5.35

5.40

5.47

5.53

5.58

5.59

5.61

5.64

5.67

5.68

5.70

5.77

5.81

5.87

5.93

VI

REPLACEABLE PARTS 6

.

1

6.4

Schmitt Trigger Circuit

.

Horizontal Amplifier

.

High-Voltage Power Supply

.

Intensity Control

.

Scale Control

.

Low-Voltage Power Supplies

.

Introduction

.

Servicing the

.

Performance Check

.

Test Equipment

.

Preliminary Settings

.

Horizontal Amplifier

.

Sweep Generator

.

Vertical Amplifier Bandwidth

.

Calibrator

.

Intensity Modulation

.

Sweep and Gate Output

(Option Feature)

.

Accessory Probes

.

Adjustments

.

Equipment Neededfor Adjustments 5-4

.

Locationof Adjustments

.

Preliminary Settings

.

Low-Voltage Power Supplies

.

High-Voltage Power Supply

.

Horizontal Amplifier

.

Sweep Generator

.

Vertical Amplifier

.

Calibrator

.

Repairs

.

Equipment Required

.

Procedure

.

Troubleshooting

.

Isolating Troubles to

Major Section

.

Low-Voltage Power Supplies

.

High-Voltage

.

Vertical Amplifier

.

Sweep Generator

.

Horizontal Amplifier

.

Introduction

.

Ordering Information

.........

............

...........

Air

Filter

.........

...........

..........

.............

..........

.........

........

Power

........

...........

.....

.......

....

........

......

.......

........

......

........

......

.......

....

......

.......

......

a

Supplies

.......

......

Page

...

. .

.

...

. .

.

4-4 4-4 4-5 4-6 4-6 4-6 4-6

5-1 5-1 5-1 5-1 5-1 5-1 5-1 5-2 5-3 5-4 5-4

5-4 5-4 5-4

5-4 5-4 5-5 5-5 5-8 5-10 5-11 5-12 5-12

5-13 5-13 5-13

5-13 5-13 5-16 5-16 5-17 5-18

6-1 6

.

1

6-1

ii

01526-1

Model 175A

LIST

OF

ILLUSTRATIONS

List of Illustrations

List of Tables

Number Title

1-1.

1-2. 3-1. 3-2.

3-3.

3-4. 3-5. 4-1.

4-2. 4-3.

4-4. 4-5.

4-6. 4-7. 4-8.

4-9. 5-1.

5-2. 5-3. 5-4.

5-5. 5-6. 5-7. 5-8. 5-9.

5-10. 5-11.

5-12. 5-13. ModLl 175A Component Locations, 5-14. Model 175A Component Locations,

Model 175A Oscilloscope with MOI !11750A

and Model 1780A Plug-In Cathode-Ray TubeWarranty. Model 175A Controls and Terminals Internal Sweep Magnified Sweep Probe Compensation

Intensity Modulation Overall Block Diagram of Model 175A

with Model 1750A Plug-In Vertical Amplifier Block Diagram Cross-Coupled Cathode Follower

Simplified Schematic Diagram Sweep Generator Block Diagram. Trigger Generator Simplified Circuit

and Composite Characteristic Simplified Schmitt Trigger Circuit. Horizontal Amplifier Block Diagram High-Voltage Power -Supply

Block Diagram.

Low-Voltage Power-Supply

Block Diagram. Test Plug Adjustments and Component Locations,

Top View Adjustments and Component Locations,

Bottom View. Pattern Adjustment. Frequency Compensation Attenuator Compensation Trigger Sensitivity Scan Balance Mid

-

Frequency Response

Preliminary Adjustment Mid-Frequency Response

Final Adjustment. High-FrequencyResponse Model 175A Component Locations,

T~D View

Bottom View. Right Side View

. . .

.

. . . .

.

. .

.

. .

. . . . . . . .

.

. . . . . . . . . .

.

. .

.

. . . .

.

Units

. . . .

.

. . . .

.

. .

. . . . .

Unit

. . . . . . . .

.

. . . . . .

. . . . . . .

. . . . . . . . .

. . . . . . .

. . .

. . . . . .

. . .

. . . . . . . . .

. . . . . .

.

. . .

.

. . . . .

. . . .

. .

.

. . . . . .

. . . . . . .

.

. .

. . .

.

. . . .

.

. .

.

. . .

. .

.

. . .

.

. .

.

. .

.

. . .

. . . .

.

1-0

1-2 3-0 3-2 3-3 3-4 3 -5

4-0 4-1

4-2 4-3

4-4 4-5 4-5

4-6 4-7

5-5 5-6 5-7

5-8 5 -9 5-10 5-10 5-11

5-12 5-12

5-12 5-19 5-20 5-21

Number Title Page

5-15. Model 175A Component Locations,

Left Side View

5-16.

A1

Vertical-Input Assembly

Component Locations

5-17. A2 Vertical-Output Assembly 5-18. Beam-Finder Switch S1, 5-19. Vertical Amplifier (schematic diagram) 5-25

5-20. A101 Sweep-Generator Assembly 5-21. A102 Trigger-Source Switch Assembly,

5-22. A103 Trigger-Level and -Slope Switch

5-23. Sweep Generator (schematic diagram) 5-27

5-24. 5-25. A1002 Sweep-Time Switch Assembly, 5-26. Sweep-Time Switch 5-27. A201 Horizontal Amplifier Assembly 5-28. A202 Horizontal Display Switch Assembly, 5-29. Horizontal Amplifier (schematic diagram)5 -31

5-30. A301 High-Voltage and Calibrator 5-31. A302 High-Voltage Deck Assembly 5-32. High-Voltage Power Supply and 5-33. A401 Low-Voltage Power Supply 5-34. Low-Voltage Power Supply. 5-35. Heater Circuit (schematic diagram

5-36. A701 Gate- and Sweep-Output Assembly 5-37. 5-38. Connectors

Component Locations Mounted Components

Component Locations Mounted Components Assembly, Mounted Components

AlOOl

Sweep-Switch Circuit Board

Component Locations Mounted Components (schematic diagram). Component Locations Mounted Components

Assembly Component Locations Component Locations Calibrator (schematic diagram). Component Locations (schematic diagram)

Component Locations

Gate

and Sweep Output

(schematicdiagram)

.

. . . . .

. . . . . .

. .

. . . . .

. . . . . . .

.

. .

. . . . .

. , . . . . .

.

. . .

. . . . . .

. .

. . . .

. . . . .

. . .

.

. .

. . . .

. . .

. .

. . . . . .

.

. . . .

.

. .

.

. . .

.

. .

.

. .

.

. .

.

5-21 5-23 5-24 5

-2

5-26 5 -26 5-26

5-28

5-28 5-29 5-30 5-30

5-32 5-32 5-33 5-34 5-35

5-36 5-36 5-36

5-37

5

LIST

Number Title Page

1-1.

Specifications

1-2. Associated Equipment and Accessories. 1-3

Test Equipment for Checks and

5-1. 5-2. Sweep Calibration

5-3. Power Supply Tolerances

01526-1

Adjustments

.

. .

. . . . . . . . .

.

. . . . . . . .

.

. .

.

. .

.

. .

. . . . .

. . .

.

1-1

5-0 5-3 5-5

OF

TABLES

Number Title Page

5-4. Sweep Time 5-5. Troubleshooting the Low -Voltage Supply 5-14 5-6. Vertical Amplifier Troubleshooting. 5-7. SweepGenerator Troubleshooting Guide 5-17

5-8. Horizontal Amplifier Troubleshooting 6-1. Index by ReferenceDesignator 6-2. Replaceable Parts

. . . . . .

.

. . .

.

. . . . .

. . . .

. .

5-11 5-17 5-18

6-2

6-13

iii

Section Figure

I

1-1

Model

175A

1-0

Figure

1-1.

Model

175A

Oscilloscope with Model

1750A

and Model

1780A

Plug-In

Units

01526-1

Model 175A

Paragraphs

Section

1-1

to 1-8

I

SECTION

GENERAL INFORMATION

1-1.

DES

C

R

I

PTI

0

N.

1-2.

The @ Model 175A Oscilloscope

general-purpose

width

of 50 megacycles and a 6 x 10 cm display. Optional plug-in units and accessories are available to increase the versatility of this instrument. Specifications are listed in table

1-3.

AUXILIARY EQUIPMENT.

Available associated equipment and accessories

1-4. are

listed

in table

a. Plug-Ins.

clude dual-trace and single-trace vertical amplifiers

which collectively cover 5 mv/cm to 20 v/cm sensitivities and dc to 50-mc bandwidth. Horizontal units include single sweep, sweep delay, a time-mark generator, and a display scanner.

test

instrument with a vertical band-

1-1.

1-2.

Plug-in units for the Model 175A in-

is

a calibrated

Table

1-1.

I

b.

Accessories. Each oscilloscope two Model 10003A (AC-21M) high-impedance probes and a detachable power cable.

1-5. INSTRUMENT IDENTIFICATION.

1-6. Hewlett-Packard uses serial number of the serial number on your instrument with those sheets supplied with the manual will define differences between your instrument andthe Model 175A described in this manual.

1-7. WARRANTY.

1-8. Both the cathode-ray tube carry Hewlett-Packard warranties. The

is

illustrated in figure 1-2, and a copy the back of this manual for your use in tube failure within the warranty period. The Model 175A warranty

Specifications

(000-00000).

on the

title

is

also at the back of this manual.

a

two-section eight-digit

If

page of this manual, change

is

supplied with

the

first

do

(crt)

and Model 175A

crt

is

three digits

the

not agree

warranty

included at

event of

SWEEP GENERATOR Internal Sweep:

24 ranges, 0.1 psec/cm to 5 sec/cm

nier

provides continuous adjustment between

ranges and extends slowest sweep to at least

12.5 sec/cm.

Magnification: X10 (*5%) Triggering:

Internal

below

External

from any signal 0.5 volt peak-to-peakor more.

Triggering Point:

Internal

going signal displayed on the crt graticule.

External

on either the positive- or negative-going portion of the vertical signal.

HORIZONTAL Bandwidth DC to 500 kc

Sensitivity:

2

ranges, 0.1 volt/cm and 1 volt/cm. Vernier provides continuous adjustment between ranges and extends minimum sensitivity to 10 volts per centimeter.

Input Impedance:

1

-

Vertical input signal (from 2 mm

1

mc to approximately 2 cm

-

Either capacitive-

-

Any level of positive- or negative-

-

Any level between +5 and -5 volts

AMP

LIFTER

megohm shunted by approximately 30 pf

or

*3%.

at

50 mc).

direct-coupled,

Ver-

VERTICAL AMPLIFTER Bandwidth: DC to greater than 50 mc

CALIBRATOR Type:

Approximately 1000-cycle square wave, approximately 3 psec rise time

Voltage:

2

ranges, 1 volt and 10 volts peak-to-peak,

*l%,

15°C to 35°C

CATHODE-RAY TUBE Type:

@

post accelerator, 12-kv accelerating potential. Type P31-AL phosphor standard. For other phosphors,

Graticule:

Internal, 6 x 10 cm, marked in centimeter squares. Major horizontal and vertical axes have 2-millimeter subdivisions.

Intensity Modulation:

Approximately +20-volt pulse of normal intensity

GENERAL Power Requirements:

115 or 230 volts ac mately 425 watts maximum (depends on plug-ins used).

see

OPTIONS.

will

*lo%,

50 to 60 cps, approxi-

blank trace

01526-1

1-1

Section

Figure

I

1-2

Model 175A

Table

1-1.

GENERAL (cont'd) Dimensions:

16-3/4 inches wide, 12-1/4 inches high, 24-3/8 inches deep overall; hardware furnished for quick conversion to 12-1/4-inch

x

19-inch rack mount,

22 inches deep behind panel.

Weight:

Net

approximately

70

lb

maximum (depends on

plug-ins used)

Plug-In Vertical Amplifiers:

($3

Model 1750A Dual Trace Vertical Amplifier,

40

dc to

@

Model 1751A Single Channel Vertical Ampli-

arx

fier,dc to 50 mc

@

Model 1752A High Gain Vertical Amplifier, dc to 18 mc

@

Model 1753A Single Channel Vertical Amplifier, dc to 40 mc

Specifications (Cont'd)

Plug-In Horizontal Time Base Units:

($3

Model 1780A Auxiliary Unit

@

Model 1781A Sweep Delay Unit

@

Model 1782A Display Scanner

@

Model 1783A Time-Mark Generator

Accessories Furnished;

Two probes, 10003A (AC-21M), division, one power cable

Accessories Available:

($3

1075A, 1075B (AC-83A) Viewing Hood

($3

Model 1115A Testmobile

($4

Model ultraviolet light source for illuminating the graticule and pre-sensitizing film

OPTIONS

02. Supplied with

07.

Supplied with

11.

Supplied with

08. Sawtooth Output (approximately -2.5 volts to +2.5 volts) and Gate Output (+5-volt pulse nominal, riding on a

1O:l

voltage

196B Oscilloscope Camera, includes

P2

phosphor

P7

phosphor

P11

phosphor

-

2.5 volt level).

HEWLETT-PACKARD CO. PAGE MILL

1-2

ROAD.

PAL0 ALTO. CALIF.

U.S.A.

Figure 1-2. Cathode-Ray Tube Warranty

01526-1

Model 175A Section I

Table

1-2

Table 1-2. Associated Equipment and Accessories

@

Model Name

Description

1750A

Dual Trace

Vertical Amplifier

1751A

1752A

Fast

High Gain

Rise Plug-In

Vertical Amplifier

1753A

Single Channel

Vertical Amplifier 1780A 1781A

Auxiliary Plug-In

Sweep Delay Generator

1782A Display Scanner

1783A

Time-Mark Generator Provides intensity modulating time markers synchronized with

Oscilloscope Camera Makes permanent record of oscilloscope trace on quick-develop-

~~ ~

1075A or

Viewing Hood 1075B (AC-83A)

Dual-trace and differential display, 0.05 v/cm to 20 V/Cm

sensitivity, 9 nsec rise time (dc to

40

mc bandwidth).

7-nsec rise time, (dc to 50 mc bandwidth), 0.05 v/cm to

20 v/cm sensitivity.

0.005 v/cm to 20 v/cm sensitivity, dc to 18 mc bandwidth. Dual-input differential display, single channel.

Single channel, single input, 0.05 v/cm to 20 v/cm sensitivity,

rise

9-nsec

time (dc to 40 mc bandwidth).

Single or normal sweep, manual or external arming.

to 10 cm of sweep delay.

0

Will

either trigger or arm main sweep. Horizontal display controlled by either main sweep or delaying sweep for all or part of trace. Delaying sweep rate 2psec/cm to

Provides output to operate conventional

1

sec/cm.

X-Y

recorder. Includes pen stabilizer for nearly constant writing rate. Approximately 30-mc bandwidth with 40-mc plug-in unit.

1,

sweep. Marker intervals 0.1,

or 10 psec.

ing Polaroid-Land film. Clamps quickly to oscilloscope bezel. Oscillo-Raptar fully corrected f/1.9 lens. Alphax #3 shutter, 1/100 to internal graticule of

1

second. Includes ultraviolet light to silhouette

crt.

Model 10351A Carrying Case available.

Shades crt screen from surrounding light sources.

1115A

Testmobile Holds oscilloscope in convenient position for viewing. Rolls on

4-inch rubber-tired wheels. Tilts instrument from 10" below to 20" above horizontal in 5" increments. Chrome plate. Folds compactly for shipment or storage.

10003A

(AC- 21M)

10002B (AC- 21C)

Voltage Probe (2 sup-

plied with Model 175A Oscilloscope)

Voltage Probe 10002A or

High-impedance

imately

4

Division ratiolO:l, input impedance approximately 10 megohms shunted

High-impedance

imately 5 Division ratio 50:

test

probe with flange-operated jaws and approx-

feet of shielded cable matched to oscilloscope input.

by

10

pf.

Maximum voltage rating 600 volts peak.

test

probe with flange-operated jaws and approx-

feet

of shielded cable matched to oscilloscope input.

1,

input impedance approximately 9 megohms

~~ ~

shunted by 2.5 pf. Maximum voltage rating 1000 volts peak.

10025A (AC-21J)

10035A

lOOlOA

lOOlOB lOOlOD

Low Frequency Probe

~~~~

Tip Assortment

Alligator jaw Pincer jaw

Banana

Provides straight-through connection to oscilloscope from circuit

test

points. Pushbutton operated jaws. Shunt capacity approxi-

mately 150 pf. Cable approximately

to binding post adapter Model

5

lOllOA

feet long. Requires BNC

or equivalent.

One each of the 10010 tips for 10002A/B or 10003A Probes lOOlOE Pin tip

lOOlOF

lOOlOG

Hook tip Spring tip

01526-1 1-3

Section I Paragraphs 1-9 to 1-14

Model 175A

1-9.

SPECIAL FEATURES.

1-10. Special features of the Model 175A include the Hewlett-Packard internal-graticule crt, PRESET triggering, BEAM FINDER, and a cabinet which

serves both bench- and rack-mount requirements. Optional plug-in units are provided for both the vertical and the time axis. The main vertical amplifier

rise

time

is

less

than 7 nanoseconds which provides

maximum versatility for present and future plug-ins.

1-11.

CATHODE-RAY TUBE.

1-12. The 12-kv post-accelerator type with the cule which eliminates parallax, and an aluminized

crt

used in the Model 175A

is

a multi-grid

@

internal grati-

phosphor. The gun structure provides a large

10 cm distortionless viewing area as well as extremely high deflection-plate sensitivity. No frontpanel astigmatism control

1-13. SPECIAL CONTROLS.

1-14. Special panel controls make the Model 175A easy to operate. With SWEEP MODE in PRESET, the

sweep will synchronize internally on nearly all signals. BEAM FINDER enables the operator to locate the beam when increases the maximum sweep rate to 10 nsec/cm, calibrated in

it

is

off screen. SWEEP MAGNIFIER

all

positions.

is

required.

6

x

1-4

01526-1

Model

175A

Paragraphs

Section

2-1

to 2-18

11

SECTION

INSTALLATION

2-1.

INCOMING

2-2. MECHANICAL INSPECTION. 2-3. Upon receipt of your Model 175A, check the

contents of the shipment against the packing inspect the instrument for any obvious damage received in transit. See warranty sheet at the back of

this

manual. Keep the packing material until per-

formance check 2-4. PERFORMANCE CHECK.

2-5. Check the performance of the Model 175A by making the manual. Use this check to verify cations and also inspection. Instructions for the plug-in units will be found in the individual manuals for these instruments.

2-6. INSTALLATION. 2-7. The Model 175A

lett-Packard cabinet, suitable for bench or rack mount. Top and bottom covers may easy accessibility to internal parts and adjustments.

2-8. RACK MOUNTING. 2-9. Parts necessary for rack mounting are pack-

aged with

a. Remove b. Remove

c.

Remove adhesive-backed trim strip from sides.

d. Attach filler strip along bottom edge of front

panel.

e.

Attach mounting flanges to sides with larger

notch toward bottom of instrument.

f.

Mount in standard 19-inch rack (mounting screws

not supplied).

Rear support must be supplied to the rack-.< mounted instrument to mechanical vibrations.

2-10. 2-11. The air filter in this instrument must receive

an oil coat before the instrument

use

to prevent excessive dirt from entering instrument

case. Recommended

No.

3

“Handi-Koter” sprayer cans at most heating-supply stores or through your Hewlett-Packard field sales engineer.

the

COOLING.

Filter Coat. This adhesive

INSPECTION.

has

been successfully completed.

tests

outlined in paragraph 5-5 of this

all

listed specifi-

as

part of an incoming quality-control

is

packaged in the new Hew-

be

removed for

instrument. Proceed as follows:

tilt

stand.

feet

(press foot-release button).

Note

if

it

is

to be subjected

is

placed in normal

is

Research Products Company

is

available in

list

and

II

2-12. The cooling fan and air filter are located at the rear of the Model 175A. Leaveat least two inches of clearance behind the instrument for the free move-

ment of air. In rack installations be sure that the

recirculation of warm not result in high ambient temperature. Inspect the

air

filter periodically and clean pears to be reducing the flow of cooling section V for cleaning instructions.

2-13. POWER REQUIREMENT. 2-14. The Model 175A operates on 115 or 230 volts

*lo%,

the plug-ins used, but will not exceed approximately 425 watts. Before connecting the instrument to the power source, be sure

rear

proper fuse

2-15. SAFETY POWER CABLE. 2-16. To protect operating personnel the National

Electrical Manufacturers’ Association (NEMA) recommends that the instrument panel and cabinet be grounded. This instrument conductor power cable which grounds the instrument when plugged into an appropriate outlet. The offset round pin on the power-cable three-prong connector

is

when operating the instrument from a two-contact outlet, use a three-prong to two-prong adapter and connect the green pigtail on the adapter to ground.

2-17.

2-18. To repack the Model 175A for shipment, always

use the best packaging methods available. If the original container with is sales office for packing materials or instructions. The following steps are a general guide:

the instrument.

ment”.

50

to

60

panel

Connecting to a 230-volt source with the switch in the 115-volt position can result in damage to the instrument.

the ground pin. To preserve the protection feature

not on hand, consult your nearest Hewlett-Packard

a. Wrap the instrument in heavy paper.

b.

Protect the panel with cardboard strips.

c.

Use a strong cardboard or wooden

d. Use ample packing material around all sides of

e.

Seal with heavy tape or metal bands.

f.

Mark the container “Fragile - Delicate Instru-

is

in the correct position, and that the

is

installed (see section VI).

REPACKAGING FOR SHIPMENT.

air

within the rack cabinet does

it

as soon as

cps. Power required dependsupon

that

the 115-230 switch on the

CAUTION

is

equipped with a three-

its

packing pads and fillers

air.

it

apSee

box.

01526-1

2-

1

Section

Figure

111

3-1

SWEEP

OCCURRENCE

Model 175A

POWER switch and indicator light. The 115-

1.

230 volt switch

CALIBRATOR. Provides 1-volt and 10-volt

2.

is

located on

rear

square waves for calibration purposes and for probe compensation.

SCALE. Rotates

3.

graticule of

4.

INTENSITY. Adjusts brightness of

crt.

trace

to align

it

with internal

trace.

intensity-modulation input and switch cated on

5.

FOCUS. Adjusts sharpness of trace; no panel astigmatism control

BEAM FINDER. Locates

6. TRIGGER SLOPE. Permits triggering sweep

7.

rear

panel.

is

needed.

trace

when off screen.

on either positive- or negative-going slope of

trigger-source waveform.

TRIGGER LEVEL. Adjusts point on trigger-

8.

source waveform

TRIGGER SOURCE. Selects LINE, INTernal,

9.

at

which triggering occurs.

EXTernal AC, or EXTernal DC.

Figure

3-1.

panel.

An

are

lo-

Model 175A Controls and Terminals

10. SWEEP MODE. Selects triggered or free-running sweep. stable

11.

TRIG INPUT. Trigger signal input when

triggering with nearly

TRIGGER SOURCE

A

PRESET position provides

all

signals.

is

in EXTernal.

12. HORIZ INPUT. Input for external horizontal

signal.

13.

HORIZONTAL DISPLAY. Selects source of horizontal signal and horizontal sensitivity, including SWEEP MAGNIFIER X10.

14. EXTERNAL VERNIER. Adjusts external hori-

zontal sensitivity between calibrated steps of HORIZONTAL DISPLAY.

15. HORIZONTAL POSITION. Adjusts position of

trace

horizontally; vertical controls

are

on

panel of plug-in unit.

16. SWEEP TIME. Selects calibrated sweep in 1-2-5 steps from 0.1 pSEC/CM to 5 SEC/CM.

17. VERNIER. Adjusts sweep

rate

between

cali-

brated steps of SWEEP TIME switch.

3-0 01526-1

Section Paragraphs 3-1 to 3-28

111

Model 175A

SECTION

OPERATION

3-1. GENERAL.

3-2. The front panel labeling of the Model 175A closely describes the function of each control. The instrument and compatible test probes are provided. Vertical

controls are on the panel of the vertical plug-in unit. Their operation instrument.

3-3. BEAM FINDER. 3-4. BEAM FINDER locates the trace when

otherwise be off the screen. Depressing this button brings the trace on the screen, defocused and intensified. The POSITION controls can then be adjusted to bring the trace to the center of the screen.

3-5. CALIBRATION. 3-6. The CALIBRATOR amplitude

1%

from 15°C to 35°C (50°F to 95°F). Square-wave outputs are provided at an amplitude of and a frequency of approximately

3-7. TRIGGERING.

3-8. Four front-panel controls affect the start of the normal sweep. They are the TRIGGER SOURCE switch, TRIGGER LEVEL control, TRIGGER SLOPE switch, and SWEEP MODE control.

3-9. TRIGGER SOURCE. 3-10. The TRIGGER SOURCE switch selects the

source of the sweep trigger: the power line (LINE), the signal applied to the vertical amplifier (INT), or an external signal applied to TRIG INPUT (EXT AC or EXT DC). With INT lected, the trigger signal generator. With EX” DC selected, the trigger signal

is

3-

11.

3-12. The TRIGGER LEVEL control selects the voltage level on the trigger signal at which the sweep

starts. The control provides continuous adjustment of the trigger level from about -5 volts to about +5 volts on external trigger signals and over a range equivalent to internal trigger signals.

3-13. TRIGGER SLOPE. 3-14. TRIGGER SLOPE determines whether the sweep

starts

of the trigger signal. 3-15. SWEEP MODE.

3-16. The SWEEP MODE control determines whether the sweep requires a trigger or free runs. The control

is

has

a rise time of less than 7 nanoseconds,

is

described in the manual for that

it

might

is

accurate to

1

and 10 volts

1

kc.

or EXT AC triggering se-

is

ac-coupled to the sweep

dc-coupled to the sweep generator.

TRIGGER LEVEL.

6

centimeters of vertical deflection on

on the positive-slope or negative-slope portion

continuously adjustable with a switched position

111

(PRESET) at

PRESET triggering condition

triggered functions.

it

may be desirable to move the control out of PRE-

SET.

3-17. SWEEP CONTROLS,

3-18. SWEEP TIME. 3-19. There are 24 positions of the SWEEP TIME

control, from

to *3%. Intermediate (uncalibrated) sweep times

may be obtained by adjusting sweep time VERNIER. 3-20. SWEEP MAGNIFIER.

3-21. In the INT SWEEP TAL DISPLAY the basic sweep time by the setting of the SWEEP TIME switch. In the X10

magnified position the displayed sweep

faster, accurate to

scale

by

magnified signal

across; however, HORIZONTAL POSITION has enough

range to permit any portion of the presentation to be positioned on screen.

3-22. On the fastest sweep time, 0.1 pSEC/CM X10

(10 nsec/cm) do not use the time-scale measurements since small non-linearities

may exist. Due to the delayinthe vertical amplifier, this portion of the trace precedes the actual triggering point of the waveform. trace

is position of SWEEP TIME, the be used.

3-23. HORIZONTAL FUNCTIONS.

3-24. HORIZONTAL DISPLAY performs three external horizontal input functions: it selects external input, sets the sensitivity to 0.1 v/cm or arranges the input circuit for ac or dc coupling.

3-25. INTENSITY MODULATION.

3-26. INTENSITY MODULATION controls are on the rear panel of the Model 175A (see figure 3-5). itive 20-volt pulse intensities.

3-27. STEP-BY-STEP PROCEDURES. 3-28. Figure 3-1 briefly describes the function of

each of the Model 175A controls. cedures for a few basic operations are given in figures 3-2 through 3-5. Included are instructions for compensating the probes. The numbers on each control refer the illustration.

its

counterclockwise extreme. The

is

best for nearly all

At

some discrete frequencies

5

SEC/CM

10 to obtain the actual sweep time. The

is

positioned off screen in the 10 pSEC/CM X10

to

the corresponding step in the text below

to

0.1

~SEC/CM,

X1

position of HORIZON-

is

*5%.

Divide the SWEEP TIME

actually 10 screen diameters

first

5 cm of trace for

As

long as the

full

10-cm display may

will

blank the trace at normal

Step-by-step pro-

accurate

that

indicated

is

10 times

first 5 cm of

1

v/cm, and

A

pos-

01526-1

3-

1

Section

Figure 3-2

111

SWEEP

OCCURRENCE

1

Model

175A

Set INTENSITY MODULATION (rear panel) to

1.

INT and SWEEP OCCURRENCE to NORMAL. Set HORIZONTAL DISPLAY to INT SWEEP X1.

2. Set TRIGGER SOURCE to INT.

3.

Set SWEEP MODE to PRESET.

4.

If

5.

6.

7.

8.

9.

3-2 01526-1

signal amplitude

TIVITY to 20 VOLTS/CM. Connect signal to vertical INPUT.

If trace Adjust HORIZONTAL, VERTICAL POSITION. Release BEAM FINDER, adjust FOCUS and IN-

TENSITY. Increase sensitivity,

is

not visible, depress BEAM FINDER.

is

unknown,

set

SENSI-

if

necessary

Figure 3-2. Internal Sweep

to trigger sweep, and readjust POSITION

controls to center trace.

10. For vertical amplitude measurements, sensitivity VERNIER to CALIBRATED.

11.

Set SENSITIVITY for a vertical display tween 2 and 6 centimeters high.

12. Set TRIGGER SLOPE to trigger onpositive-

or negative-going slope of signal,

13. Adjust TRIGGER LEVEL, stable triggering.

14. If time-scale measurements

set

sweep time VERNIER to CAL.

15. Set SWEEP TIME for horizontal display as desired.

as

if

necessary, for

are

to be made,

set

be-

desired.

Model

175A

INTENSITY

@

BEAM FlNDfR

-

TRIGGEff

TRIGGER

SLOPE

LEVEL

Section

III

Figure 3-3

__

. . . .

t

SWEEP

WE

TRIGGER

SOURCE

Set controls as in figure 3-2.

1. Set HORIZONTAL DISPLAY to INT

SWEEP

X10.

2. Adjust HORIZONTAL POSITION to view any part of the display. Do

5

cm of fastest magnified sweep (0.1

not make time measurements in the first

pSEC/CM

X10).

Figure 3-3. Magnified Sweep

01526-1 3- 3

Section

Figure

111

3-4

-

UNDERCOMPENSATED

-

CORRECTLY COMPENSATED

-

OVERCOMPENSATED

Model 175A

SWEEP

PLUG-IN

OCCURRENCE

69

IlMCLL

Connect probe to vertical INPUT and touch

7. tip to 10 VOLTS CALIBRATOR.

8.

Holding rear flange of probe, loosen locknut. Holding vinyl sheath

9.

at

rear of probe, rotate

rear flange to obtain illustrated square wave.

AUXILIARY

LO<.

1.

Set SWEEP TIME to 0.5 MSEC/CM. 6. Set SENSITIVITY to 0.2 VOLTS/CM.

2.

Set HORIZONTALDISPLAY to INTSWEEPXl.

3.

Set TRIGGER SOURCE to INT.

Set SWEEP MODE to PRESET.

4.

3-4

5.

Set TRIGGER LEVEL to

0.

Figure

10. Tighten locknut.

3-4.

Probe Compensation

01526-

1

Model

175A

Section

III

Figure 3-5

INTENSITY

Connect modulating voltage to INPUT (+20 volts will

1.

blank trace

2.

Switch to EXTERNAL.

MODULATION

at

normal intensity).

Figure 3-5. Intensity Modulation

LD-

5-

687

LD-S-688

01526-1

3-

5

Section Figure

IV

4-1

VERTICAL

PRESENTATION

9

\

CHANNELA

CHANNEL

B

Model

175A

I

Q

[SENSITIVITY1

I

I I

9

1-1

I

!Qm]

\

‘.C

;;I

I

,I

I

I.,

’

I

TRACE

AMPLIFIER

I

9

[VERTICAL

4

POSITION/

VERTICAL

AMPLIFIER

\

7--

I

ro

CRT

vmn

CA

D

Ef

PL A TES

L

€C

nON

-1

I

4-0

Figure

4-1.

Overall

Model

Block

1750A

Diagram

Plug-In

of

Unit

Model

175A

with

01526-1

Model

175A

Section

Paragraphs 4- 1 to

4-

IV

10

SECTION

PRINCIPLES

4-1.

OVERALL FUNCTIONAL DESCRIPTION.

4-2. The Model 175A consists of a high- and a lowvoltage supply, a vertical and

a

sweep generator and a calibrator. Bothpower sup-

plies are regulated, tions include a gate- and sweep-output circuit not included in the standard instrument. Figure 4-1 shows the main functional units and controls. a dual-trace plug-in amplifier has been shown as part of the diagram. The circuits of the plug-in units are described in the manuals for those instruments. Circuit diagrams

5-19 to 5-38.

4-3. VERTICAL AMPLIFIER. The vertical amplifier delays the signal received from the dual-trace amplifier and applies the amplified signal to the vertical deflection plates of the crt. Before the signal is

signal to the sweep generator for internal triggering

of the sweep. 4-4. SWEEP GENERATOR. The sweep generator

accepts a trigger signal from an internal or external

source and generates a fast-rising trigger which

synchronized with the trigger signal. The trigger

starts

the beam horizontally across the crt screen. The

sweep generator thus provides a linear time base on

which to measure the vertical signal. The sweep

generator also provides an unblanking pulse to turn on the crt beam during the sweep.

4-5. HORIZONTAL AMPLIFIER. The horizontal

amplifier converts the internal sweep or external

a

block diagram of the instrument illustrating

delayed, the vertical amplifier applies part of the

the linearly rising sweep voltage which drives

of

the

as

Model

a

horizontal amplifier,

is

the dc heater supply. Op-

For clarity,

175A are shown in

figures

is

IV

OF

OPERATION

signal

the signal to the level required deflection plates of the crt.

4-6. CALIBRATOR. The calibrator multivibrator generates a square wave of about and 10-volt outputs.

4-7. HIGH-VOLTAGE POWER SUPPLY. The highvoltage power supply cuit which generates the three regulated dc voltages required for operation of the crt.

4-8. LOW-VOLTAGE POWER SUPPLIES. Operating voltages for all the oscilloscope circuits, including the high-voltage supply, are provided low-voltage power supplies. regulated.

4-9.

4-10. The vertical amplifier anced differential amplifier. The block diagram shown in figure 4-2. The amplifier receives the balanced signal from the plug-in vertical amplifier, amplifies the signal, and drives the vertical deflection plates of the line which delays the vertical signal 0.2 psec before applying the delay line, the signal from one side of the amplifier generator for internal triggering of the sweep. This

starts

signal at the crt deflection plates. The delayed signal 5105 for use in the Model 1782A Display Scanner.

from unbalanced to balanced, and amplifies

to

drive the horizontal

1

kc with 1-volt

is

an

rf

oscillator-rectifier cir-

All

dc voltages are

VERTICAL AMPLIFIER.

is

a conventional bal-

crt.

The circuit includes a delay

it

to the vertical plates of the crt. Prior to

is

sampled, amplified and applied to the sweep

the sweep in advance of arrival of the vertical

is

also applied to horizontal plug-in connector

by

the

is

CATHODE

DELAY

LINE

VERTICAL INPUT

SIGNAL

FROM

PLUG-IN

01526-1 4-1

CATHODE

FOLLOWER

INPUT

AMPLIFIER

Figure 4-2. Vertical Amplifier Block Diagram

CATHODE AMPLIF I ER

-

FOLLOWER

v3

TRIGGER SIGNAL

TO SWEEP GENERATOR

THROUGH TRIGGER-SOURCE

+

A

SWITCH

SI02

v4

FOLLOWER

--*

DRIVER

v7

OUTPUT

AMPLIFIER CATHODE-RAY TO

CATHODE

FOLLOWER

-

I

CAL

VERT

OUTPUT

TUBE

DISPLAY

SCAN NE

R

Section

IV

Paragraphs 4-11 to 4-29

Model 175A

INPUT+

---

I

V6A

U

INPUT+

t

+V

Figure 4-3. Cross-Coupled Cathode Follower

Simplified Schematic Diagram

4-11. CROSS-COUPLED CATHODE FOLLOWER. 4-12. Input stage

cross-coupled cathode followers. The simplified schematic

is cathode follower circuit provides driving source for the following stage. quencies, the stage acts as High frequency signals appearing readily pass through coupling capacitors to the opposite cathode. Since these high-frequency signals are in phase with the signals

add to the current available to the load. The decrease

in load impedance at high frequencies

pensated by the increase in high-frequency current offered by the cross-coupled cathode follower. plate and cathode resistors are the same value, there-

fore voltages in amplitude and the signals are effectively added in

parallel. Since the plate and cathode signals are

added at high frequencies, the effective output imped-

ance

is

reduced.

4- 13. DIFFERENTIAL AMPLIFIER.

4-14. Input amplifier

differential amplifiers. An unbalanced signal applied to one grid will appear at both plates balanced amplified. Common-mode signals, such as hum, at

V1,

as

well

as

V3 and V7, are

shown in figure 4-3. The cross-coupled

a

low impedance

At

a

simple cathode follower.

at

the plate circuits

at

the opposite cathode, they

low fre-

is

partly com-

The

at

the plates and cathodes are equal

V2

as well

as

V4 and V7 are

and

the grids the circuit of amplifier V4, cathode degeneration

are

reduced in magnitude at the plates.

In

is

introduced by Gain control R45, reducing the gain of

the stage.

4-15. PEAKING. 4- 16. Series and shunt peaking are provided through-

out the amplifier to extend the bandwidth while maintaining optimum transient response. Coils L7 and L8

adjust high-frequency response. Capacitors C22 and

C35, which remove cathode degeneration in the circuits of V4 and V7

provide a means of adjusting mid-frequency

as

signal frequency increases,

and

low-frequency response. 4-17. SYNC AMPLIFIER.

4-18. The sync amplifier

is

composed of two cathode

followers (input and output) and two amplifiers. The

sync amplifier samples the signal prior to the vertical amplifier delay line and delivers this amplified signal to the trigger generator to start the sweep. Since the signal in the vertical amplifier

is

delayed 0.2 p sec

after the sync amplifier pick-off point, the sweep is

able to

start

before the vertical signal reaches the

crt deflection plates. 4-19. DELAY LINE.

4-20. The delay line

is

constructed to provide

0.2 psec delay. The internal impedance of input amplifier and R24

V2

in parallel with plate load resistors R23

is

designed to match the impedance of the delay line in order to minimize reflections. The delay line

is

peaked with L13 and L14 for optimum tran-

sient response. 4-21. CIRCUIT PROTECTION.

4-22. Diodes CR1,

2,

3, and 4 prevent the gridcathode voltage of V3 and V7 from becoming excessive during turn-on time.

4-23. SCAN OUTPUT. 4-24. Cathode follower V10 provides low-impedance

output to the horizontal plug-in connector for use with the Model 1782A Display Scanner. R71-R73 and R74-R72, reduces the dc level

A

balanced divider,

at

the plates of V7 to approximately zero volts; C36 and C37 compensate the divider

at

high frequencies.

C33 balances the high-frequency scan output.

4-25.

SWEEP

GENERATOR.

4-26. The sweep generator consists of sweep-generating circuits plus an amplifier and trigger generator which actuate the sweep-generating circuits. diagram of the sweep generator

is

shown in figure 4-4.

A

block

4-27. TRIGGER GENERATOR.

4-28. The trigger signal is applied through differential driver

YlOl

to trigger-generator tunnel diode

CR102 and amplifier Q103. TRIGGER SLOPE and

TRIGGER LEVEL controls are in the driver circuit. 4-29. The trigger generator

as

a

bistable device to convert

wave shape to

a

rectangular wave with very

is

a

tunnel diode acting

an

input signal of any

fast

a

4- 2

01526-1

Model 175A

-IOOV

'

Section IV

Paragraphs 4-30 to 4-33

TIMING

SWITCH

SWEEP HOLD-OFF

TIME RELATION

BETWEEN SWEEP

AND HOLD-OFF

A

4

nx

GATE OUTPUT

BIAS-CONTROL

CATHODE

FOLLOWER

VI09

I

/

I

SWEEP MODE

1

FOLLOW CATHODE ER

V105A

TIMING

CAPACITOR

HOLDOFF

CAPACITOR

-IOOV

I

-i?Nf

f4

I

CATHODE

I

FOLLOWER

I

-1

-

I

-&/I

f

VI07

4b-b

CATHODE

FOLLOWER

VI058

A

t

SWEEP OUTPUT

BO-

L-331

Figure 4-4. Sweep Generator Block Diagram

switching times. A simplified circuit

is

shown in figure 4-5A, and the composite characteristic of this circuit characteristic

is

illustrated in figure 4-5B. The composite

is

the sum of the currents through the tunnel diode and through the Sensitivity control. Because the tunnel diode

a

negative resistance region while the Sensitivity control justed to

is

a linear device, Sensitivity can be ad-

alter

the shape of the curve in figure 4-5B,

is a non-linear device with

achieving narrow switching limits between points D and E. The Symmetry control adjusts the total current halfway between switching points D and E. trigger signal varies through voltage follow the path CDGFEBC, producing the

to

the circuit, establishing bias line CF,

its

cycle, current and

As

rec-

the

tangular trigger output. The inductor sharpens the

rise and fall times of the square wave by preventing

fast

current changes through the Sensitivity con-

trol. Points A and

the trigger signal put

of

the trigger generator

H

represent the signal limits when

is

larger than necessary. The out-

is

differentiated by transformer T103, and the resulting sharp pulses actuate the gate generator.

4-30. SWEEP GENERATING CIRCUITS.

4-31. Gate generator V103/V104A

is

a

Schmitt

cir-

cuit with wide hysteresis limits. Between sweeps,

the A section of bias control cathode follower VI09 holds the bias at the input of thegate generator close to the lower hysteresis limit.

The trigger generator applies both positive and negative triggers. The positive triggers

are

reduced in amplitude by clipper diode CR103 and have no effect, but a negative pulse drives the input to the gate generator below the lower hysteresis limit and causes the gate generator to switch

4-32. When gate generator V103/V104A switches,

(see

paragraph 4-40).

it

provides positive and negative gates. The positive gate

is

applied to the high-voltage power supply through the horizontal plug-in to turn on the crt beam. The negative gate applies reverse bias to switchdiode

CR106. Prior to the gate, the switch diode

is

forward biased and holds the input to integrator V106 at about -4 volts. The negative gate opens the diode switch and frees the input to the integrator.

4-33. Once freed, the input to integrator V106 starts going negative since it

is

connected to

-100

volts

through the sweep-time resistor (figure 5-23). The

integrator amplifies and inverts its input to produce

a

large, positive-going output which

is

applied back to the input through cathode follower V107 and the sweep capacitor (figure 5-23).

As

a result, the

01526-1

4-3

Section IV Paragraphs

A.

CIRCUIT

I

5.5

uc?

4-34

to

0

4-41

+V

4

I

W-LI

OUTPUT

TRIGGER

SYMMETRY

Model

175A

diode

CR106.

integrator

The switch diode returns the input of

V106

to its pre-sweep level, discharging

the sweep capacitor.

4-35.

During a sweep time, hold-off cathode follower

V105B

ends, this capacitor

V103/V104A

charges a hold-off capacitor. After the sweep

lets

the input to gate generator

down slowly enough to prevent that circuit from being triggered again until the remaining sweep circuits have recovered completely. The SWEEP TIME switch changes the size of the hold-off capacitor with sweep time.

4-36.

Clamp

from the same voltage level, about

4-37.

The SWEEP MODE control determines the no-signal bias erator tion of bias control cathode follower

V104B

V103jV104A

ensures that each sweep starts

-50

volts.

R172

at

the input to gate gen-

by setting the

(figure

bias

on the A sec-

V109.

5-23)

With the control set to PRESET or in the TRIGGER portion of its adjustable range, the gate generator bias cannot drop below its lower hysteresis limit unless the trigger generator provides a trigger. With the control set in the FREE RUN portion of its adjustable range, the gate bias teresis limit. Thus

is

allowed to drop below its lower hys-

as

the hold-off capacitor

dis-

charges, it lets the gate generator bias all the way down to the lower hysteresis limit, and another sweep starts automatically.

-

V

LD-

Y

-

643

8.

Figure

I

COMPOSITE CURVE

4-5.

Trigger Generator Simplified Circuit

and Composite Characteristic

V106

change in voltage at the input to integrator ing the sweep time

is

only about one volt. Voltage

dur-

across the sweep resistor, then, changes by about

1%,

and the current through the resistor changes by the same amount. The current through the sweep resistor

is

the charging current for the sweep capacitor; therefore, the voltage across the sweep capacitor changes quite linearly with time, and the sweep signal

is

a nearly linear voltage ramp. The SWEEP TIME switch changes the value of sweep resistor or capacitor to change the sweep time. The sweep output

is

applied to the horizontal amplifier through the

horizontal plug-in.

4-34.

An

attenuated sweep signal is applied to the input of gate generator cathode follower cathode follower

V105B

V109.

V103, V104A

through hold-off

and section B of bias control

This signal drives the input of the gate generator up to the upper hysteresis limit and causes the gate generator to switch back to its

pre-sweep state. The gate generator then ends the the gates, blanking the crt and forward biasing switch

4-38.

SINGLE-SWEEP OPERATION,

4-39.

The SWEEP OCCURRENCE switch (on the panel of the horizontal plug-in unit) selects normal or single-sweep operation. Normal operation

is

discussed above. For single-sweep operation, the SWEEP OCCURRENCE switch converts Schmitt circuit. cathode follower

As

the sweep signal from hold-off

V105B

rises

to end the gate from

V109

into a

the gate generator, the sweep signal also switches the Schmitt circuit of and

V109A

is

cut off. The B section of holds the input to gate generator enough

so

that triggers from the trigger generator

V109

so

that

V103/V104A

V109B

conducts

V109

then high

cannot actuate the gate generator, and the sweep generating circuits are effectively disabled. itive signal applied to circuit of

V109

so

cut off. The A section of

that

V109A

V109

switches the Schmitt

conducts and

then sets the input to

A

pos-

V109B

is

the gate generator according to the setting of the SWEEP MODE control, and the sweep generating circuits are effectively armed. The switching signal for

V109.4

can be an external signal applied to the ARMING INPUT connector or an internal signal obtained by switching SWEEP MODE control out of its PRESET position.

4-40.

SCHMITT TRIGGER CIRCUIT.

4-41.

The Schmitt trigger circuit

is

a form of bistable multivibrator used where fast-rising signals are required. Figure

4-6

shows a simplified Schmitt trigger circuit and input and output waveforms. If initially the input voltage is such that

V2

conducts.

itive, it

As

the input voltage becomes more

will

eventually reach a predetermined level

(a) at which the circuit changes state;

V1

is

cut off,

pos-

conducts

4- 4

01526-

1

Mxlel

175A

Section

Paragraphs 4-42 to 4-46

IV

E+

c

VI

I

INPUT

-9

P--

OUTPUT

Figure

4-6.

Simplified Schmitt Trigger Circuit

Et

+

SD-u-79

4-43.

4-44. The horizontal amplifier amplifies the internal sweep or an external signal applied to the horizontal INPUT connector and drives the horizontal deflection plates of the crt. Figure diagram of the horizontal amplifier. The internal

sweep signal DISPLAY switch to cathode follower V203A. From V203A the signal passes through cathode follower V203B to one input of differential amplifier V204V205. The other grid of the differential amplifier

returned to ground through a resistance. The differential amplifier amplifies the difference between its two input signals (one of which vides output cathode followers V208A and V208B. These cathode followers drive the crt deflection plates. The cathode followers also drive capacitance driver V209 which acts cathode followers. When high-speed signals such the faster sweeps drive the crt beam from right, the capacitance driver discharges the capacitance of the crt deflection plates.

4-45.

PUT connector pass through an attenuator, amplifier V201A-B, and the HORIZONTAL DISPLAY switch to cathode follower V203A. Otherwise the operation the same signal.

HORIZONTAL

is

a

balanced output signal which

as

the cathode resistance for the output

External horizontal signals applied to the

as

described above for the internal sweep

AMPLIFIER.

4-7

is

a

simplified block

applied through the HORIZONTAL

is

ground) and pro-

is

applied to

left

is

as

to

IN-

is

and V2 tive, the common cathode potential decreases and V2 grid goes positive. When the input reaches second predetermined level circuit of the circuit negative depending upon the slope of the input.

4-42.

trigger switches are the hysteresis limits. Note that the circuit does not switch unless the input crosses both limits.

HORIZ

INPUT

is

cut off.

switches back to

The input voltage levels

*

If

the input voltagethengoes nega-

(b),

its

initial state.

is a voltage step, either positive or

EXTERNAL

INPUT

AMPLl

v201

F I ER

-+

GENERATOR

V2

conducts and the

at

which a Schmitt

C

ATH 0 DE

FOLLOWER

V203A

4

INPUT

FROM

SWEEP

The output

CATHODE DIFFERENTIAL

FOLLOWER

V203B

1

I

4-46. The HORIZONTAL DISPLAY switch selects the signal to be applied to the horizontal deflection plates. The switch also controls the input attenuator and the

a

sweep magnifier. The sweep magnifier attenuator between V203A and V203B provides expansion. The EXTERNAL VERNIER control varies the series resistance between V201A and V201B and thereby varies the output of V201B. The range of the EXTERNAL VERNIER tinuous adjustment of external horizontal sensitivity between the calibrated settings of the HORIZONTAL DISPLAY switch. switch

-+

AMPLIFIER

V204,

is

in the common cathode circuit of V204 and

V205

is

sufficient to provide con-

A

section of the BEAM FINDER

OUTPUT OUTPUT

CATHODE

-+

FOLLOWER RAY

V208 TUBE

T

CAPACITANCE

DRIVER

V209

a

means of sweep

CATHODE

I I

t

I

TO

01526-1

Figure 4-7. Horizontal Amplifier Block Diagram

4-5

Section

W

Paragraphs 4-47 to 4-56

Model 175A

V205. When pressed, the switch reduces the gain

so

that an unbalance prior to V204 and V205 cannot de-

flect the crt beam off the screen.

4-47.

HIGH-VOLTAGE POWER SUPPLY.

4-48. The high-voltage supply provides the operating voltages for the crt. voltage power supply

50-kc output

of

voltage transformer T301. up the oscillator output to high

A

block diagram of the high-

is

shown in figure 4-8. The

rf

oscillator V301

is

applied to high

The transformer steps

ac

voltages which rectifiers V304, V305, and doubler stage V302 and V303 convert to dc.

The dc voltages

are

then sup-

plied to the crt. 4-49. Control of the high-voltage supply

is

accom-

plished by comparing the -2700 volts supplied to the

crt cathode with +370 volts from the regulated lowvoltage power supply. ply produce an error voltage which the dc control amplifier V306A-B and the oscillator

as

Changes in the -2700 volt sup-

is

amplified by

is

applied to

a

control voltage. The control voltage changes the output amplitude of the oscillator, and hence corrects for the change in the -2700 volt

supply. 4-50. The crt

unblanking

is

normally biased off. The positive

gate from the sweep generator, applied

to the crt control grid, overrides the bias andun-

blanks the crt.

the sweep time

The gating pulse time

so

that the crt remains onduring

is

identical to

sweep time and external horizontal operation.

4-51. INTENSITY CONTROL.

INTENSITY control R319 varies the -2700 volts

4-52. supplied to the crt control grid.

FOCUS

control R334

varies the voltage supplied to focus element of the

crt to produce control

a

sharply defined trace. Astigmatism

R340, part of the voltage divider from the +370 volt supply to the +I10 volt supply, varies the voltage on the crt to compensate for electron-beam defocusing when the beam

is

being deflected by the

vertical or horizontal signals. A section of the

BEAM F'INDER

is

in the crt control-grid supply. When pressed, the switch returns the grid supply to +370 volts instead of ground, turning on the crt.

4-53. SCALE CONTROL. 4-54. SCALE control R350 rotates the trace by vary-

ing the current through

a

coil around the neck of the

crt, and hence the magnetic field through which the

beam must pass. Rotation of the SCALE control

changes the voltage and polarity across the deflection coil enough to give

*lo

degrees.

4-55.

LOW-VOLTAGE POWER SUPPLIES.

a

control range of approximately

4-56. The low-voltage power supplies include an independent supply and three dependent supplies. The

-100 volt supply reference for the +370 and

is

the independent supply.

+llO

volt supplies and

It

is

provides operating voltage to the differential amplifier of the +110 volt supply and to the sensor ampli-

fier of the +6.3 volt supply.

a

4- 6

REGULATOR

-

OSCl LLATOR

I

V30

Figure 4-8. High-Voltage Power Supply Block Diagram

V306

I

t

-IOOV

4

H.

V.

T R A NSFO RM ER

RECTI

b

RECTIFIER

V302, V303

FI

ER

V304

DOUBLER

c:

-2700V

-

W

CATHODE

ACCELERATING

TO CRT

+9300V

TO

CRT

ELECTRODE

01526-1

Model

175A

Section

Paragraph

IV

4-57

RECTIFIER

F

I

LTER

F

I

RECTI

ER

FILTER

-i

DRIVER

a424

Q42

I

,Q422,Q423

DRIVER

Q443 Q444

REGULATOR

Q46

I

4

t

SENSOR

AMPLIFIER

Q425

at

A

SENSOR

AMPLIFIER

it

-

I

-

4

+370V

+llOV

-IOOV

RECTI FlER

FILTER

RECTIFIER

FILTER

4-57.

A

simplified block diagram of the regulated output).

is

power supplies

regulator acts each supply output (even

the return leg of the supply,

+370

volt returns, the regulator

shown in figure

as

a

variable resistance in series with output against a reference voltage. The amplifier

if

the series regulator

Figure

as

in the

is

DRIVER

DIFFERENTIAL

AMPL

I

FlER

V461

8

T

DRIVER

0402,4483

4-9.

Low-Voltage Power-Supply Block Diagram

4-9.

Each series

is

in then changes the effective resistance

+110

volt and regulator, and thereby the voltage drop across

in

series with the oppose the change in output voltage.

SENSOR

AMPLIFIER

0484

A

any change in the output voltage by comparing the

4

sensor or differential amplifier senses

w:

v

*’

A

-

BD-L-lll

b

-6.3V

b

+6.3V

of

the series

it,

to

01526-1

4-7

Section

V

Table 5-1

Model 175A

~

Item

1

Instrument

~

'ertical Response

Table 5-1. Test Equipment for Checks and Adjustments

Instrument

Required to Test Mode 1

Horizontal Bandwidth Trigger Sensitivity

Signal

Generator

~~~ ~

Characteristics

50 kc, 500 kc, 1 mc, 50mc,

1.5 volt output; output amplitude constant with frequency

Oscillator Trigger Point

Frequency:

1

kc

Amplitude: 10 volts

Calibration

Generator

Output: 0.3 to 50 volts peak-

0.2

0

to 300

volts

to peak, 0.03 to rms (*0.350/0), volts dc

Horizontal Sensitivity

Calibrator

High-Voltage Power

Supply

Sweep Gain

Trigger Sensitivity and

Symmetry

Vertical Gain

Calibrator

~~ ~

Time -Mark

Generator

Marker intervals from

0.1 psec to 5 sec in 1-2-5 steps; output am-

plitude greater than 50 mv

Sweep Calibration Sweep Magnifier Pattern Sweep Time

Vertical Bandwidth

Tester

plug-in unit

Vertical Pulse Response

Ref

Para

5-13 5-17

5-16

5-12 5-21

5-37

5

-42

5-50 5-55

5-58 5-18

5-19 5-39 5-52

5-20 5-57

Tektronix

Type 19OA

@

200CD

@738 AR

Tektronix

Type 180A

9

10405A Mercury-pulser vertical

6

Square-Wave

Generator

Test

Oscilloscope

DC Voltmeter

9

High-Voltage

Vacuum -Tube

Voltmeter

10

11

AC Voltmeter

Test Plug

12 Vertical Test

Adapter

Frequency: 4 kc to

1

mc

Output (open circuit):

600 ohm: 50 volts

75 ohm:

7

volts

10-mc passband, external

sync, 0.1 psec/cm to 5 sec/cm sweep time

Range:

0

-

4CO

0 - 3000

vdc,

1%

vdc, 8%

full scale

Input Impedance:

To

be constructed

1

megohm

(see figure 5-1)

Test plug to allow signals

to be applied directly to vertical amplifier

Intensity Modulation Horizontal-Amplifier

Frequency Compensation Sweep Length Scan Response

Sweep and Gate Output Scan Response

Low -Voltage Power

Supplies Preset

High-Voltage Power

Supply

Low

-Voltage Power

Supplies

scan Response none

Vertical Gain

5-22 5-46 5-51

5-56

5-23 5-56

5-33 5-49

5-35

5-33

5-56

'@211A

$3

160B

$3

170A

@

175A w/08*

@

412A

'@

410B

\@

459A

$3

400D/H/L Range: 1 mv to 0.1 volt

@

10404A

13 Variable

Transformer

To vary line voltage from 102 to

measurement (para 5-33)

To

hold line voltage at 115 volts for waveform and voltage measurements

during adjustment

*

Model 175A Oscilloscope with option 08, Sweep and Gate Output

-0

5

128

(204 to 256) volts for power-supply

01526-1

Model 175A

Paragraphs 5-1 to 5-12

Section

V

SECTION

MAINTENANCE

5

-1.

INTR

0

DU

CTION.

5-

2.

This section covers routine maintenance, troubleshooting, and adjustment of the Model 175A Oscilloscope.

may be used to verify proper operation of the instrument at incoming inspection or after adjustments have been made.

5-3.

SERVICING THE AIR FILTER.

5-4. Inspect the

ment and clean to restrict the flow of cooling the

filter in warm water and detergent. Dry thoroughly and coat with a from Research Products Company, Inc. This adhesive your Hewlett-Packard sales representative.

5-5.

5-6. The performance check mine whether or not the instrument in

refer

horizontal plug-in units, refer to the individual manuals covering these instruments.

5-7. TEST EQUIPMENT. 5-8. Test equipment recommended for the per-

formance check

7.

istics may 5-9. PRELIMINARY SETTINGS.

5-10. Vertical and horizontal plug-in units must be in place to make the performance check. Set the 115230 volt switch to the line voltage being used.

channel, select CHANNEL trols. Make the following settings on the panel of the vertical plug-in unit:

settings on the panel of the horizontal plug-in unit:

is

PERFORMANCE CHECK.

its

specifications. Should adjustment be required,

to paragraph 5-25.

Similar instruments having the listed character-

a.

If

the vertical plug-in unit

AC-DC..

SENSITIVITY VERNIER

b.

Depending on model number, make the following

Model 1780A: Model 1781A/B:

Model 1782A:

Model 1783A:

A

performance check

air

filter at the rear of the instru-

it

before

from the instrument and wash

filter

adhesive such

available from heating supply stores or from

is

listed in table 5-1, items 1 through

be

substituted.

it

becomes clogged enough

To check the vertical and

A

and use channel A con-

..................

..........

.................

SWEEP OCCURRENCE. SWEEP SELECTOR FUNCTION TIME MARKER

.............

..........

is

included which

air.

To clean, remove

it

as

Filter Coat No. 3

is

intended to deter-

is

operating with-

has

more than one

2

VOLTS/CM

...

MAINSWEEP

thoroughly

AC

CAL

NORMAL

OFF OFF

V

c. Make the following settings on the Model 175A:

POWER

INTENSITY MODULATION SWEEP TIME Sweep VERNIER HORIZONTAL DISPLAY EXTERNAL VERNIER

TRIGGER SOURCE

SWEEP MODE

TRIGGER LEVEL TRIGGER SLOPE

d. Depress BEAM FINDER to locate trace. With BEAM FINDER depressed, center display with horizontal and vertical position controls.

e. Release BEAM FINDER and turn INTENSITY control clockwise,

pear on screen.

f.

The INTENSITY control should vary the intensity of the display from extinguished to brighter than normal intensity. Adjust INTENSITY for normal viewing level.

g. The FOCUS control should defocus the display at each extreme of the control and focus the display at approximately midrange. Adjust FOCUS for sharpest display.

h. Adjust SCALE control to align the trace parallel

to the horizontal graticule lines.

5-11. HORIZONTAL AMPLIFIER. 5- 12. SENSITIVITY.

a. Connect the Calibration Generator to HORIZ

INPUT.

b. Set Calibration Generator output for 10 volts

peak- to-peak.

c. Set:

HORIZONTAL DISPLAY EXTERNAL VERNIER. fully counterclockwise

d. Horizontal deflection should be

e. Set:

EXTERNAL VERNIER

f.

Horizontal deflection should be 10 cm k0.5 cm.

g. Set Calibration Generator output for

peak-to-peak.

h. Set:

HORIZONTAL DISPLAY

..................

....

.........

INTERNAL

1

MSEC/CM

.............

.........

............

..........

FREE RUN

ON

CAL

X1

CAL

INT

.............

if

necessary. A trace should ap-

. .

1

VOLT/CM AC

1

cm or less.

..........

.

0.1 VOLT/CM AC

1

(+)

CAL

volt

0

01526-1

5-1

Section

Paragraphs 5-13 to 5-17

DISPLAY in the same manner.

5-13. BANDWIDTH.

amplitude for a horizontal deflection of

5-14. SWEEP GENERATOR. 5-15. PRESET.

vertical INPUT.

V

i.

Horizontal deflection should be 10 cm *0.5 cm.

j.

Check the two dc positions of HORIZONTAL

k. Disconnect Calibration Generator.

a. Connect Signal Generator to HORIZ INPUT. b. Set:

HORIZONTAL DISPLAY.

c. Set Signal Generator for 50 kc and adjust output

d. Set frequency of Signal Generator to e. Horizontal deflection should be at least 7 cm.

f.

Disconnect Signal Generator.

a. Set:

HORIZONTAL DISPLAY SWEEP MODE

b. No sweep should be present.

c.

Connect CALIBRATOR 10 VOLT output to the

d.

A

stable synchronized display should be present.

e.

Disconnect CALIBRATOR.

*

.

0.1 VOLT/CM DC

.........

*

- * -

.

10

500

PRESET

cm.

kc.

X1

Model 175A

Set Signal Generator frequency to 1 mc and out-

c.

put amplitude for

Adjust TRIGGER LEVEL,

d. synchronized display and reduce the Signal Generator output amplitude until the sweep stops. The sweep should continue to trigger at signal amplitudes 0.2 cm or greater.

e. Set:

TRIGGER SOURCE

f.

Repeat steps c and d. The sweep should con-

tinue to trigger at signal amplitudes of approximately

0.5 cm or greater. g. Set:

TRIGGER SOURCE

h. Repeat steps c and d. The sweep should con-

tinue to trigger at signal amplitudes of approximately

0.5 cm or greater.

i.

Set frequency of Signal Generator to

output amplitude for 3 cm of deflection.

j.

Set: SWEEP TIME

HORIZONTAL DISPLAY

k. Repeat step d. The sweep should continue to

trigger at signal amplitudes of approximately

or greater.

m. Set:

TRIGGER SOURCE

1

cm of vertical deflection.

if

necessary, for a

.........

0.1

.........

EXT

AC

EXTDC

50

mc and

pSEC/CM

X10

1

cm

EXT AC

5-16. TRIGGER POINT.

a.

Connect Oscillator to vertical INPUT.

b. Adjust Oscillator output for 5 cmdeflection, and

frequency to

c. Rotate TRIGGER LEVEL to bothextremes. The

starting point of the sweep should be adjustable to any

point

on

d. Set:

TRIGGER SLOPE

e. Rotate TRIGGER LEVEL to bothextremes. The

starting point of the sweep should be adjustable to any

point on the negative slope of the signal.

f.

Disconnect Oscillator. ReturnTRIGGER LEVEL

to

0

and TRIGGER SLOPE to

5-17. TRIGGER SENSITIVITY.

a. Connect Signal Generator to the verticalINPUT

and TRIG INPUT.

b. Set:

SWEEP TIME

Vertical SENSITIVITY

1

kc.

the positive slope of the signal.

.............

+.

..........

...

0.5

1

pSEC/CM

VOLT/CM

(-1

n. Repeat step d. The sweep should continue to trigger at signal amplitudes of approximately or greater.

p. Set:

TRIGGER SOURCE

q. Set Signal Generator output amplitude for 3 cm of deflection.

r.

Repeat step d. The sweep should continue to trigger at signal amplitudes of approximately or greater.

s.

Disconnect Signal Generator.

t.

Connect a Model 10003A (AC-21M) Probe to

vertical INPUT.

u. Set:

TRIGGER SOURCE

Vertical SENSITIVITY

SWEEP TIME

HORIZONTAL DISPLAY

TRIGGER LEVEL

v. Connect probe tip to power line. Donot connect

probe ground lead.

...........

....

.........

5 VOLTS/CM

5MSEC/CM

.........

.............

1

cm

INT

2

cm

LINE

X1

0

5-

2

01526-1

Model

175A

SWEEP TIME

.I

~SEC/CM

.2

FSEC/CM

.5

~SEC/CM

1

~SEC/CM

2

~SEC/CM

5

FSEC/CM

io

~SEC/CM

20

~SEC/CM

50

~SEC/CM

.I

MSEC/CM

.2

MSEC/CM

.5

MSEC/CM

Markers

10

mc

5

mc

1

psec

1

psec

1

psec

5

psec

10

psec

10

psec

50

psec

100

psec

100

psec

500

psec

Table

~~ ~

Interval

1

cycle/cm

1

cycle/cm

1

marker/2- cm

1

marker/cm

2

markers/cm

1

marker/cm

1

marker/cm

2

markers/cm

1

marker/cm

1

marker/cm

2

markers/cm

1

marker/cm

5-2.

Sweep Calibration

SWEEP TIME

1

MSEC/CM

2

MSEC/CM

5

MSEC/CM

io

MSEC/CM

20

MSEC/CM

50

MSEC/CM

.1

SEC/CM

.2

SEC/CM

.5

SEC/CM

1

SEC/CM

2

SEC/CM

5

SEC/CM

Paragraphs

Markers

1

msec

1

msec

5

msec

10

msec

10

msec

50

msec

100

msec

100

msec

500

msec

1

sec

1

sec

5

sec

Section

5-18

to

Interval

1

marker/cm

2

markers/cm

1

marker/cm

1

marker/cm

2

markers/cm

1

marker/cm

1

marker/cm

2

markers/cm

1

marker/cm

1

marker/cm

2

markers/cm

1

marker/cm

V

5-20

A

stable synchronized pattern should be obtained.

w.

x.

Disconnect probe from power line and vertical

INPUT.

5-18.

SWEEP CALIBRATION.

a.

Set: TRIGGER SOURCE.

SWEEP TIME. Sweep VERNIER SWEEP MODE

b.

It should take at least

to travel

c. Set:

d. Connect the Time-Mark Generator to vertical INPUT. Set Time-Mark Generator output and SWEEP TIME as shown in table

e.

TIVITY,

f.

to make the

cule edge. The 10-cm marker should be within

cm

5-19.

a. Set:

b. Set Time-Mark Generator output for

markers.

c. With HORIZONTAL POSITION, set one marker

to coincide with

0

1526-

10

cm.

SWEEP MODE Sweep VERNIER

Adjust TRIGGER LEVEL and vertical SENSI-

if

necessary, for a stable, usable display.

In each case adjust HORIZONTAL POSITION

first

marker coincide with theleft grati-

of

the right graticule edge.

SWEEP MAGNIFIER.

SWEEP TIME

HORIZONTAL DISPLAY

1

..........

left

graticule edge.

...........

...

fully counterclockwise

..........

125

seconds for the spot

FREE RUN

............

.............

5-2.

0.1

MSEC/CM

.........

5

SEC/CM

PRESET

100

psec

INT

CAL

i0.3

XI0

d. The next marker should be within i0.5 cm of

right graticule edge.

e. Set:

SWEEP TIME

f.

Set Time-Mark Generator output for

g. Set one cycle of the sine wave to cross the left

graticule edge.

h. Except for the

play, the corresponding point on the waveform one

cycle later should cross within graticule edge.

i.

Disconnect Time-Mark Generator.

5-20.

VERTICAL AMPLIFIER BANDWIDTH.

a. Install Vertical Response Tester in place of

vertical plug-in unit.

b. Set:

SWEEP TIME.

c. Adjust HORIZONTAL POSITION and TRIGGER

LEVEL,

d. Set Test Plug-In for a positive 5-cm pulse. e. Center trace with VERTICAL POSITION. The

10%

2

cm below and 2 cm above the main horizontal axis

of the crt.

f.

point on any vertical line of the graticule. The point should be no more than 7 mm to the right of the

10%

g. Remove Test Plug-In and replace verticalplug-

in unit.

if

necessary, for a stable display.

and

90%

points on the pulse rise time are now

Set HORIZONTAL POSITION to place the

point,

.........

first

cycle of the expanded dis-

.........

i0.5

0.1

cm

0.1

pSEC/CM

10

of

the right

pSEC/CM

mc.

10%

90%

5-3

Section V Paragraphs 5-21 to 5-32

Model 175A

5-21. CALIBRATOR.

a. Connect the Calibration Generator to vertical

INPUT and set output for 10 volts peak-to-peak.

b.

Set:

SWEEP TIME HORIZONTAL DISPLAY Vertical SENSITIVITY Vertical Sensitivity

VERNIER

c. Rotate vertical sensitivity VERNIER clockwise

for exactly 5 cm of vertical deflection.

d. Disconnect Calibration Generator and connect CALIBRATOR 10 VOLT output to vertical INPUT. Vertical deflection should be bient temperature and 95°F). Vertical deflection should be 5 cm cm

if

ambient temperature or 35°C and 55°C (32°F and 50°F or 95°F and 130°F).

5-22. INTENSITY MODULATION.

a.

Connect the 600-ohm output of the Square Wave Generator to vertical INPUT and INTENSITY MODULATION INPUT.

b. Set 600-ohm output to maximum and frequency

to 10 kc.

c. Set:

SWEEP TIME

Vertical SENSITIVITY INTENSITY MODULATION. Vertical POLARITY

d.

The top of the square wave should beintensified

with respect to the bottom.

e. Disconnect Square Wave Generator. Return

INTENSITY MODULATION to INT.

..........

2

.........

.....

..........

5

is

between 15°C and 35°C (50°F

is

between 0°C and 15°C

..........

....

1

counterclockwise

cm *0.05 cm

20 pSEC/CM

10 VOLTS/CM

.......

...........

MSEC/CM

X1

VOLT/CM

if

am-

*0.15

EXT

+UP

b. Connect the Model 10003A (AC-21M) Probe from

vertical INPUT to CALIBRATOR 10 VOLT output.

c. Loosen locknut plastic flange with respect to cable. The waveform should change from one with overshoot to one with undershoot.

d. Adjust probe for best square wave and tighten

locknut.

e. Disconnect probe from vertical INPUT and CALIBRATOR.

f.

to vertical INPUT. The vertical amplitude of the

display should be equal to that noted in step d.

g. Disconnect CALIBRATOR from vertical INPUT.

5-25. ADJUSTMENTS.

5-26. This section covers internal adjustments of the Model 175A. any adjustment, refer to paragraph 5-67 for troubleshooting procedures.

5-27. EQUIPMENT NEEDED FOR ADJUSTMENTS. 5-28. In table 5-1, items 3 through 13 are the test

instruments recommended to make the adjustments outlined in this section. Equipment with equivalent

characteristics may be substituted. The special

horizontal Test Plug shown in figure 5-1 to test the main vertical amplifier scanner outputs.

5-29. LOCATION OF ADJUSTMENTS.

5-30. and adjustments in the Model 175P.. These diagrams are screened on the inside of the top and bottom covers of the instrument.

Note vertical amplitude of display.

Connect CALIBRATOR 1 VOLT output directly

Figures 5-2 and 5-3 show the location of tubes

at

rear of probe and rotate rear

If

difficulty

is

encountered in making

is

required

5-23. SWEEP AND GATE OUTPUT

(OPTIONAL FEATURE).

a.

Set SWEEP MODE to FREE RUN.

b. Trigger Test Oscilloscope with gate output

signal from Model 175A.

c. Observe SWEEP OUTPUT signal on Test

cilloscope.

imately -2.5 to +2.5 volts on

settings.

d. Observe GATE OUTPUT signal on Test Oscilloscope. Signal should be approximately the duration of sweep on all SWEEP TIME settings.

e. Disconnect Test Oscilloscope. 5-24. ACCESSORY PROBES.

a.

Set: SWEEP TIME

Vertical SENSITIVITY

5-4

Signal should be a linear ramp of approx-

.........

all

...

0.2 VOLTS/CM

SWEEP TIME

4

0.5 MSEC/CM

Os-

volts for

5-31. PRELIMINARY SETTINGS.

5-32. Install vertical and horizontal plug-in units in their compartments in the Model 175A. If the vertical plug-in unit has more than one channel, select CHANNEL

a. Make the following settings on the panel of the

vertical plug-in unit.

AC-DC.. VERNIER

b.

Depending on model number, make the follow-

ing settings on the panel of horizontal plug-in unit:

Model 1780A:

SWEEP OCCURRENCE.

Model 1781AjB:

SWEEP SELECTOR

Model 1782A:

FUNCTION

Model 1783A:

TIME MARKER.

A

and use channel A controls.

.................

..

.NORMAL

...

MAIN SWEEP

...........

........

AC

CAL

OFF

01526-1

Model 175A

J105(13)<<

T

RI

IOOK

Paragraphs 5-33 to 5-39

d.

Check regulation of each supply

age

is

varied between 102 and 128 volts. voltages should remain within in step b or c.

e.

Measure Voltmeter. given in table 5- 3.

ac

ripple on each supply using the AC

The ripple should be within the values

Section

as

the line volt-

All

regulated

1%

of the values noted

V

J

1050

5)<<

RI.

1/2W, -hp-STOCK N0.0727-0304

1

R2: RESISTORS, IOOK f lolo,

\

CONNECTOR: MALE, 32-PIN, AMPHENOL PART NO. 26-4100-32P

-hp- STOCK NO. 1251-0136

Figure 5-1. Test Plug

R2

IOOK

I

CI. C2: CAPACITORS, IOPF

f

0.5PF, 500V,-hp- STOCK

NO.

0150-0009

LD-S-bm

Wire

Supply Tolerance Ripple (volts) (volts) (rms) Code

-

100 *3 3 mv +110 *3 3mv pink +370 +6.3

-6.3

5-35. HIGH-VOLTAGE POWER SUPPLY. 5-36. Refer to

5-37. DC OUTPUT.

a.

b.

meter by setting ,the Calibration Generator to 300 volts, connecting the voltmeter 100: divider probe to the generator output, and setting the Voltmeter to read 3 volts.

*lo

*.2

*.2 2

Set line voltage to 115 volts.

Calibrate the High-Voltage Vacuum-Tube Volt-

4 mv red

2 mv brown

mv grav

figure

5-2 for location of adjustments.

Color

violet

Adjust-

ment

R472 R45 R433 R486 R486

1

high-voltage

1

c.

Connect Model 175A to power source through Variable Transformer and volts. Make the following settings on thepanel of the Model 175A:

POWER

HORIZONTAL DISPLAY

EXTERNAL VERNIER

TRIGGER SOURCE

TRIGGER SLOPE

TRIGGER LEVEL

SWEEP MODE

SWEEP TIME

Sweep VERNIER 5-33. LOW-VOLTAGE POWER SUPPLIES.

5-34. Refer to figure 5-3 for location of adjustments.

a. Set line voltage to 115 volts (230voltsif the 115-

230 volt switch

b.

Measure output of each supply connecting the

DC Voltmeter to the terminals on the printed circuit board mounted adjacent and at right angles to the supply fuses (see figure 5-3).

c.

The voltages

given

in

the adjustments in the order given in table 5-3. 01526-1

..................

is

in 230-volt position).

table 5-3. If adjustment

will

set

line voltage to 115 (230)

. .

1

VOLT/CM AC

.........

...........

............

.............

...........

.........

.............

normally be within the limits

is

PRESET

lMSEC/CM

required, make

ON

CAL

INT

(+)

CAL

0

c.

Set Voltmeter range to 30 volts and measure the voltage T401 (see figure 5-3).

*loo

ing of -2700 volts.

-2700 volt supply output should remain within *25 volts of the reading obtained in step d or

5-38. ASTIGMATISM.

tain the smallest round and sharply focused spot. 5-39. PATTERN.

INPUT.

at

pin 1 of the low-voltage power transformer

d. The measured voltage should be -2790 volts

volts.

e.

Adjust

f.

Vary line voltage from 102 to 128 volts. The

a.

Center a low intensity spot on the crt.

b. Adjust FOCUS and Astigmatism Adj R340 to ob-

a. Connect the Time-Mark Generator to vertical

b.

Set:

HORIZONTAL DISPLAY

HV

Adj R328,

if

necessary, for a read-

e.

.........

X1

5-5

Section Figure

V

5-2

Model 175A

@

6CW5

DELAY LINE

a

TRANSFORMER

I

,=

I

?

I

HORIZ. BLU.

GRN. VERT.

122 MID FREQ. RESPONSI

-

cC36 SCAN, RESPONSE

LOW

:35

FREQ. RESPONSE

VERTICAL AMPLIFIER

-

V11 6DJ8

-

5

-6

+

R375 CAL. VOLT ADJ.

Q301

Q302

1

Figure 5-2. Adjustment and Component bcations,

Top

View

01526-1

Model

175A

LOW VOLTAGE POWER SUPPLY

0

OQ433

OQ444

Q462

Q421

Section

Figure

7

-2700V

PIN #1

POWER TRANSFORMER

V

5-3

3AM COVER

UTPUT LEAD

MP. CONNEl

ED SWEEP

TO HORIZ

CTS

HERE

R433 t370V ADJ.

OQ424 OW64

0

~425

~463

I_.

(2x3

-

’

f

t

R472 -1OOV ADJ.

0

~484

@z8tv

ADJ.

::‘

EC

RED t370V--o

PINK

BROWN

VIOLET

+

llOVd*

t6.3V-•

-100V-•

GRAY,,

-6.3V

I

IO

lo

I

0

421

SAMP

441

LAMP

481 ,AMP I-EL0

461

LAMP

-

v

0

I

i

I

‘z

In

I\

c

01526-1

Figure

5-3.

Adjustment and Component Locations, Bottom View

5-7

Section Paragraphs 5-40 to 5-42

V

Model 175A

c.

Set Time-Mark Generator output to 5 mc and adjust vertical SENSITIVITY and VERTICAL POSITION for a 6-cm display coinciding with top and bottom lines of graticule.

d. Set HORIZONTAL POSITION to align left side

of display with left graticule edge.

e.

Adjust Pattern Adj R345 for minimum barreling or pin-cushioning around top, bottom, and sides of display

f.

Adjust HORIZONTAL POSITION to align right

side of display with right graticule edge.

g. Trim Pattern Adj R345,

e

for squarest overall pattern.

and

h. Disconnect Time-Mark Generator.

5-40. HORIZONTAL AMPLIFIER. 5-41. Refer to figure 5-3 for location of adjustments.

(see

figure 5-4).

if

necessary, for min-

Repeat steps d imum barreling or pin-cushioning.

left

5-42. SWEEP GAIN.

a.

Locate foam-covered wire which connects sweep generator output to horizontal amplifier input (see figure 5-3).

b.

Disconnect wire from sweep generator printed

circuit board.

c.

Set:

HORIZONTAL DISPLAY

d. Connect the Calibration Generator to the foam-

covered wire and

e. Center display and adjust X1 Gain Adj R225 for

5.5 cm of horizontal deflection.

f.

Set:

HORIZONTAL DISPLAY

g. Set Calibration Generator output to 5 volts peak-

to-peak.

set

output to 50 voltspeak-to-peak.

.

. . . . . .

.

. . . . .

.

XI0

X1

--

i-r

1

,;it

i-

BARRELING

*-

t

.

_-

PIN-CUSHIONING

WF-S-388

5-8

Figure 5-4. Pattern Adjustment

01526-1

Model 175A

Paragraphs 5-43 to 5-46

Section V

h. Center display and adjust X10 Gain Adj R227 for

5.5 cm of horizontal deflection.

i.

Disconnect Calibration Generator from foam-

covered wire. 5-43. INTERNAL BALANCE.

a.

Set: HORIZONTAL DISPLAY

SWEEP MODE

b.

Center the spot on

SITION control.

c.

Set: HORIZONTAL DISPLAY

d. Adjust Magnifier Centering R230 to center spot.

e.

Repeat steps a through d until spot does not

move when switching HORIZONTAL DISPLAY from

x1

to x10.

5-44. EXTERNAL BALANCE.

a.

Set: HORIZONTAL DISPLAY 0.1 VOLT/CM DC

EXTERNAL VERNIER fully counterclockwise

....

.........

just out of PRESET

crt

with HORIZONTAL PO-

.........

XI0

X1

d. Set:

Vertical SENSITIVITY Vertical Sensitivity VERNIER Vertical AC-DC.

HORIZONTAL DISPLAY

TRIGGER SOURCE

SWEEP MODE. SWEEP TIME

e.

Set 600-ohm and 75-ohm Square-Wave Gener-

ator outputs to maximum and frequency to 4 kc.

f.

Center display and adjust TRIGGER LEVEL,

necessary, for a stable

...........

.........

....

.............

lOVOLTS/CM

.....

CAL

AC

.........

display (see figure 5-5).

0.1

MSEC/CM

EXT AC

PRESET

X1

if

b.

Center the spot on

SITION control.

c.

Set: EXTERNAL VERNIER

d. Adjust External Balance R212 to center spot.

e.

Repeat steps a through d until spot does not

move when EXTERNAL VERNIER 5-45. EXTERNAL GAIN.

a.

Connect Calibration Generator to HORIZ INPUT.

b.

Set: HORIZONTAL DISPLAY

c.

Set Calibration Generator output to 1 volt peak-

to-peak.

d. Adjust Gain Adj R213 for 10 cm of horizontal

deflection.

e.

Disconnect Calibration Generator.

5-46. FREQUENCY COMPENSATION.

a.

Connect Square Wave Generator 600-ohm output

to foam-covered wire disconnected in paragraph 5-42.

b.

Connect 75-ohm output to TRIG INPUT.

c.

Connect, with a jumper, the vertical

the point (sweep output) on sweep-generator printed-

circuit board from which the foam-covered

disconnected

.

crt

with HORIZONTAL PO-

..........

is

rotated.

0.1 VOLT/CM DC

.

INPUT

wire

CAL

to

was

Figure 5-5. Frequency Compensation

g. Adjust Input Attenuator Compensation C211 for

best

square wave.

h. Set:

HORIZONTAL DISPLAY.

i.

Adjust 600-ohm Square Wave Generator output

for

8

cm of deflection. Trim C211,

for

best

square wave with HORIZONTAL DISPLAY in

X1 and X10 positions.

j.

Set: HORIZONTAL DISPLAY.

SWEEP TIME

k. Set 600-ohm Square Wave Generator output to

maximum and frequency to 40 kc.

m. Adjust X1 Gain Compensation C213 for

square wave.

n. Set:

HORIZONTAL DISPLAY

p. Set 600-ohm Square Wave Generator output for

8

cm of deflection.

q. Adjust X10 Gain Compensation C212 for best

square wave.

r.

Set:

HORIZONTAL DISPLAY.

.........

........

if

necessary,

.........

10 gSEC/CM

.........

1

VOLT/CM DC

..

XI0

X1

best

XI0

01526-1

5-9

Section Paragraphs 5-47

V

to

5-50

Model 175A

5-50. TRIGGER SENSITIVITY AND SYMMETRY.

a.

Set: SWEEP MODE

TRIGGER SLOPE TRIGGER SOURCE HORIZONTAL DISPLAY SWEEP TIME. Vertical SENSITIVITY. Vertical AC-DC

b.

Connect Model 10003A (AC-21M) Probe from vertical INPUT to case of tunnel diode CR102 on sweep-generator circuit board (see figure 5-3). CAUTION:

+110

...........

.............

.........

..

0.05 VOLT/CM

.............

VOLTS present at this point.

PRESET

(-)

EXT AC

X1

lMSEC/CM

AC

Figure 5-6. Attenuator Compensation

(Top: undercompensated, Middle: compensated,

Bottom: overcompensated)

s.

Disconnect 600-ohm Square- Wave Generator output from foam-covered wire and connect Generator to HORIZ INPUT. Adjust output amplitude for 8 cm deflection and frequency to

t.

Adjust Attenuator Compensation C203 for round dots with no tails (see figure 5-6).

u. Disconnect Square- Wave Generator and jumper from vertical INPUT and sweep-generator printedcircuit board. Connect foam-covered wire to sweepgenerator printed-circuit board.

5-47. SWEEP GENERATOR. 5-48. Refer to figure 5-3 for location of adjustments.

5-49. PRESET.

a.

Set: HORIZONTAL DISPLAY

SWEEP TIME

b.

Connect DC Voltmeter to pin 3 of V109. This

voltage will be approximately -40 volts.

c.

Rotate SWEEP MODE slowly clockwise while

watching Voltmeter.

sweep generator free runs.

d. Note voltage at which sweep generator free runs (maximum negative reading obtained on Voltmeter).

e.

Set: SWEEP MODE.

f.

Adjust Preset Adj R170 for meter reading of

2.5 volts less negative than voltage noted in step d.

g. Disconnect Voltmeter.

4

kc.

.........

Meter pointer

will

...........

X1

10 pSEC/CM

jump when

PRESET

c. Connect Calibration Generator to TRIG INPUT

and adjust output for 0.05 volt rms.

d. Mechanically center Trigger Symmetry R116,

and turn Trigger Sensitivity R120 fully clockwise.

e. Rotate TRIGGER LEVEL to obtain a free running display approximately 0.5 volt in amplitude (see figure 5-7).

Figure 5-7. Trigger Sensitivity

(Top: Synchronized, Bottom: Free Running)

f.

Using TRIGGER LEVEL to maintain a presen-

tation adjust Trigger Sensitivity R120 counterclock-

wise until a stable, synchronized, symmetrical square wave approximately 0.35 volt in amplitude obtained (see figure 5-7).

g. Set Calibration Generator output to 0.03 volt rms.

h. The trigger circuit should not trigger solidly. Counterclockwise adjustment of Trigger Sensitivity

R1-20 may be necessary to prevent solid triggering. Rotate TRIGGER LEVEL when checking for solid

triggering.

i.

Set Calibration Generator output to 0.05 volt rms.

j.

The trigger circuit should again trigger solidly.

Adjust TRIGGER LEVEL

f,

g, h, and i until circuit triggers solidly with a

0.05-volt rms input and does not trigger solidly with a 0.03-volt rms input.

if

necessary. Repeat steps

<L

is

5-10

01526-1

Model 175A

Section V

Paragraphs 5-51 to 5-56

.k. Set:

TRIGGER SLOPE

m. Ground green/orange wire which

to TRIGGER SLOPE switch.

n. Adjust Trigger Symmetry R116 for

rical square wave display.

p. Unground greedorange

from CR102 and vertical INPUT. Disconnect Cali-

bration Generator.

5-51. SWEEP LENGTH.

a.

Connect Square-Wave Generator 75-ohm output

to vertical INPUT, and set frequency to

b. Set:

HORIZONTAL DISPLAY. TRIGGER SOURCE.. TRIGGER LEVEL SWEEP MODE

SWEEP

c.

Set Square Wave Generator output and vertical

SENSITIVITY for approximately 3 cm of deflection.

d. Adjust Sweep Length R161 for

TIME.

...........

.........

wire.

........

..........

.............

is

connected

a

symmet-

Disconnect probe

1

mc.

X1

INT

PRESET

1

MSEC/CM

11

cm of sweep.

0

5-53. 5-54. Refer to figure 5-2 for locationof adjustments.

5-55. GAIN.

a. Install Vertical Test Adapter in vertical plug-in

connector

b.

Generator to Test Adapter and adjust position con-

trol on adapter for on-scale trace.

c. Adjust Gain R45 for 5 cm deflection.

d.

in unit. 5-56. SCAN RESPONSE.

a. Connect Square-Wave Generator 75-ohm output

to vertical INPUT and set frequency to 50 kc.

b.

vertical SENSITIVITY for 6 cm of deflection.

c. Trigger Test Oscilloscope with 600-ohm output

of Square- Wave Generator.

d.

and install Test Plug described in paragraph 5-28.

51

in place of vertical plug-in unit.

Connect 1.0 volt peak-to-peak from Calibration

Remove Test Adapter and install vertical plug-

Set Square-Wave Generator 75-ohm output and

Remove horizontal plug-inunit from Model 175A

e.

Disconnect Square-Wave Generator.

5-52. SWEEP TIME.

a. Connect Time-Mark Generator to vertical

INPUT.

b.

Set: HORIZONTAL DISPLAY

SWEEP MODE TRIGGER SOURCE

c. Set vertical SENSITIVITY andTRIGGER LEVEL

for

a

suitable display, and set SWEEP TIME and marker interval as shown in table 5-4. corresponding adjustment for the indicated markers

per centimeter

d. Disconnect Time-Mark Generator.

Table 5-4. Sweep Time

SWEEP TIME

.I

~SEC/CM

.2

FSEC/CM

.5

USEC/CM

1

~SEC/CM

io

~SEC/CM

.I

MSEC/CM

1

MSEC/CM

io

MSEC/CM

.I

SEC/CM

...........

if

necessary.

Markers

10 mc

5 mc

1

psec

1

psec

10 psec

100 psec

1

msec

10 msec

100 msec

..........

PRESET

...........

Make

1

Adjust

C125 C1016 C1014 C1012

ClOlO R1005 R1004

R1003 R1002

Set for

1

cycle/cm

1

cycle/cm

1

marker/2 cm

1

marker/cm

1

marker/cm

1

marker/cm

1

marker/cm

1

marker/cm

1

marker/cm

X1

INT

the

e.

Observe signal on pin 15 of horizontal plug-in

Use

connector 5105. minimize loading.

f.

Adjust Scan Response C36 for best square wave

as

viewed on Test Oscilloscope.

g. Observe signal on pin 13 of horizontal plug-in

connector 5105.

h. Adjust Scan Response C37 for best square wave

as viewed on Test Oscilloscope.

i.

Set frequency of Square-Wave Generator to 1 mc.

j.

Observe signal on pin 10 of Test Plug.

k. Adjust Scan Balance C33 for best balance as

viewed on Test Oscilloscope (see figure 5-8).

Figure 5-8. Scan Balance (Top: Unbalanced

Middle: Balanced, Bottom: Unbalanced)

probe on Test Oscilloscope to

01526-1

5-11

Section Paragraphs 5-57 to 5-60

Generator.

in

5-57. PULSE RESPONSE.

Plug-In Unit.

5 cm

just

of pulse about 0.2 cm (see figure 5-9).

v

m.

Disconnect Test Oscilloscope and Square-Wave

n. Remove Test Plug and install horizontal plug-

unit.

a.

Remove vertical plug-in unit and install Test

b.

Set Test Plug-In in

amplitude.

c.

Set: SWEEP TIME.

TRIGGER SOURCE TRIGGER SLOPE

SWEEP MODE HORIZONTAL DISPLAY

d. Set TRIGGER LEVEL for stable displayandad-

Mid Freq. Response C22 to drop leading corner

Unit

for a positive pulse output

........

-

*

0.5 pSEC/CM

* * *

............

* * - * * * * *

*

-

*

PRESET

*

- -

*

INT

(+)

X1

Model 175A

b. Set:

HORIZONTAL DISPLAY. SWEEP TIME TRIGGER SOURCE TRIGGER LEVEL SWEEP MODE. Vertical SENSITIVITY

c.

Set vertical sensitivity VERNIER for exactly

6 cm of deflection.

d. Disconnect Calibration Generator and connect

vertical INPUT to CALIBRATOR 10 VOLT output.

e. Adjust Cal Volt Adj R375 for exactly 6 cm of

deflection.

f.

Disconnect CALIBRATOR from vertical INPUT.

.........

...........

.........

0.5 MSEC/CM

...........

X1

INT

.............

PRESET

.....

1

VOLT/CM

0

Figure 5-9. Mid-Frequency Response

Preliminary Adjustment

e.

Adjust Low Freq Response C35 for

flat

top.

f.

Readjust Mid Freq Response C22 for bestpulse

response

g.

h. Adjust

high frequency corner (see figure 5-11).

i.

5-58. CALIBRATOR.

a.

and

(see

figure 5-10).

Set: SWEEP TIME

Hi

Remove Test Plug-In and install vertical plug-in.

Connect Calibration Generator to verticalINPUT

set

output to 10 volts peak-to-peak.

.........

Freq Response L7 and L8 for best

0.1

best

pulse

pSEC/CM

Figure 5-10. Mid-Frequency Response

Final Adjustment

Figure 5-11. High-Frequency Response

5-59.

5-60. The Model 175A uses edge-on connectors for

most connections to the boards. The assembly may be removed in a few moments for access to otherwise hidden components. When removing or replacing edge-on connectors be careful to align the connector

properly with

connector improperly aligned may spring the contacts and result in a poor connection.

REPAIRS.

its

guide slot. Applying force with the

5-12

01526-1

Model 175A

Section V

Paragraphs 5-61 to 5-73

5-61. EQUIPMENT REQUIRED.

5-62. In general, miniaturized equipment miniature tools. The following important:

a.

Low-heat soldering iron (25 to 50 watts). Idling

temperature must

b.

Small soldering iron tip (1/16 to 3/32 inch).

c.

Small-diameter rosin-core solder.

d. Wooden toothpick.

5-63. The low-heat iron

tect

solid-state devices from too high a temperature, and to avoid causing conductors to circuit boards. The small tip to the component, yet will be adequate to melt the solder. Small-diameter solder melts more quickly, reducing the length of time The toothpick holes after removing a component. repairs on the Model 175Aunless the above equipment

is

on hand.

5-64. PROCEDURE. 5-65. The Model 175A

boards. Each component mounting hole through in order to provide electrical conduction from one side of the board to the other and to provide

better solder bond between the circuit and the component. The plating

the hole with leads into the hole. The use for cleaning out solder, and ordinary care in replacing the component, will result in a satisfactory job.

5-66. REPLACINGTRANSISTORS. Solid-state diodes

and

transistors require special handling, in

are

sensitive to both heat and electrical overload.

Use

long-nose pliers between the iron and the device

as

a

heat sink. Hold the pliers for a moment

the iron

there leakage can damage transistors.

5-67.

5-68. ISOLATING TROUBLES TO A MAJOR

5-69. The following check may be performed whenever instrument malfunction

plug-in

is

removed

is

no electrical leakage from iron to work. Such

TROUBLESHOOTING.

SECTION.

a.

Set:

HORIZONTAL DISPLAY EXTERNAL VERNIER Vertical SENSITIVITY

Vertical

b.

Depending on the model number of the horizontal

unit,

be

no more than

is

required in order to pro-

that

is

essential for cleaning out mounting

has

is

easily damaged by reaming

a

metal tool, or by forcing component

to

allow the joint to cool. Be sure

is

Sensitivity VERNIER.

set

controls

as

follows:

are

800°F.

lift

from the printed

will

transfer less heat

heat mustbe applied.

plated-through circuit

of

the wooden toothpick

suspected.

,

.

1

..........

...

calls

for

particularly

Do

not attempt

is

plated

that

they

after

VOLT/CM AC 2 VOLTS/CM

.....

CAL CAL

Model 1780A:

SWEEP OCCURRENCE

Model 1781A/B:

SWEEP SELECTOR.

Model 1782A:

FUNCTION.

Model 1783A:

MARKER

c.

Depress BEAM FINDER.

d.

A

defocused spot should appear on the crt.

e.

If

proper display the power supplies are operating properly. If no spot appears, troubleshoot

5-70 and 5-77) and the amplifiers (paragraphs 5-81 and 5-93).

f.

Connect CALIBRATOR

tical INPUT and HORIZ INPUT,

A

tilted straight line pattern with a 10-cm hori-

g.

zontal deflection and 5-cm vertical deflection should

be obtained.

h.

If

the horizontal amplifier, vertical amplifier, and calibrator are operating properly.

a

should be obtained.

the sweep generator

5-70. LOW-VOLTAGE POWER SUPPLIES. 5-71. The transistors used in the power supply are

located on the power-supply printed-circuit board and

fan-shroud assembly. The series-regulator tran-

sistors are power transistors mounted on heat sinks on the fan-shroud assembly. The amplifier and other

transistors are mounted on the printed circuit board

(figure 5-33). 5-72.

required, ment by removing the mounting screws on rear gusset. However, power supply malfunctions can generally quickly circuit board or on the fan-shroud assembly, thus eliminating unnecessary removal of the fan-shroud ass e mbly

5-73. Nominal voltages are given on the Low-Voltage Power-Supply schematic

diagram, figure 5-34.

proper display

i.

Set: HORIZONTAL DISPLAY.

SWEEP MODE SWEEP TIME

Sweep VERNIER TRIGGER LEVEL TRIGGER SOURCE

j.

A

synchronized square wave pattern 5 cm high

k.

If

proper display

If

maintenance on the fan-shroud assembly

it

may easily be removed from the instru-

be

isolated to components either on the printed

.

...........

............

is

obtained,

the

power supplies (paragraphs

10

is

obtained,

...........

..........

............

.............

...........

is

obtained,

is

operating properly.

at

key points in the supply

...

NORMAL

.

MAIN

SWEEP

OFF

it

is

likely

that

VOLT output to ver-

it

is

likely that

.........

1

MSEC/CM

it

is

likely

X1

PRESET

CAL

INT

that

-

is

0

01526-

1

5-13

Section V

Paragraphs 5-74 to 5-76

Model 175A

5-74. The cause of excesr-re output ripple on any of the supplies can Measure the ripple at the output of the rectifiers of the supply in question. Compare the measurement with the value given on the schematic diagram, fig- supply outputs and ground ure 5-34. If the ripple filter capacitors and bleeder resistors. If the input

ripple

is

normal, the cause

&-amplifier transistors.

supply

-loov

be

isolated in the following manner.

Symptom

High output

Low output

is

excessive, check

is

most likelylow gain in anced output voltage can usually be traced to an open

Table 5-5.

Disconnect base lead of Q461 from

printed circuit board. yellow lead which connects to rear

edge of board adjacent to fan motor.

Reconnect yellow

circuit board and short collector of Q464 to emitter.

~ ~~ ~~~ ~~~

Short collector of Q462 to emitter I Output remains low I Q461 open

Remove short from Q462 and meas-

ure voltage across CR465

the

input load. The load

Troubleshooting the Low-Voltage Supply Procedure

This

wire

to printed

5-75. T cating causes of loss of regulation in each supply.

5-76. The balance between the +6.3 volt and -6.3volt

tube

or shorted tube heater or a wrong type

is

the

ble 5-5 gives troublesh

is

a series-parallel arrangement of

heaters, diagrammed in figure 5-35. An unbal-

Effect Trouble Output remains high Q461 shorted Voltage drops Q461 good

Output remains high Q462 shorted Voltage drops Q464 open

I

Voltage rises 0

volt

6 volts

oting

aids

for lo-

is

determinedby the supply

I

Q461 good CR465 shorted

CR465 good

tube.

I

+llOV

High output

Low output

Measure voltage across R470

Measure voltage from collector of

Q464 to emitter

Check -100 volt supply output

Disconnect base lead of Q442 from

printed circuit board. This white lead which connects to rear edge of board adjacent to fan motor.

Reconnect white lead and measure

voltage from collector of Q443 to emitter

Measure voltage from collector of

Q444 to emitter

Check -100 volt supply output

is

the

Within 10 volts of

output

Less than output

0

volt

approx 10 volts Q464 good

Normal Trouble in +llOV

0

volt Q443 shorted

Greater than

0

volt Q444 shorted

Greater than Normal Trouble in

2

volts

2

volts

Q463 open or C466

shorted

Q463 and C466

good

Q464 shorted

Q441 and Q442 good

Q443 good

Q444 good

+llOV

Trouble in -1lOV

5-14

__~~~

Short collector of Q443 to emiiter

~

~~ ~

Output remains low Voltage rises

Q441 or Q442 open Q441 and Q442 good

01

5

26-

1

Model

+

llOV

cont'd

+

370V

175A

~~

Symptom

Low output

High output

Table

5-5.

Troubleshooting the

Procedure Effect

Remove short from

collector of

Remove short from

ure voltage

Check

-100

+

Q444

at

base

volt supply output

~~~~ ~

110

volt supply output

Low

Q443

and short No change

to emitter

Q444

and meas-

of

Q444

-Voltage Supply (Cont'd)

Voltage rises

Positive

Normal

Abnormal

Table

5-5

I

Trouble

Q443

open

Q444

open

C445

shorted or

leaky

~~ ~~ ~

Trouble in

+

370V

Trouble in

supply

Trouble in

+

supply

-lOOV

+

Section

(cont'd)

llOV

370V

V

or

Low output

Disconnect base lead of

printed circuit board. This

orange lead which connects

rear

edge of board adjacent to

fan motor.

Reconnect orange lead and meas-

ure voltage from collector

Q424

to emitter

Measure voltage from collector

of

Q425

to emitter

-100

Check

Short collector of

Remove short from

ure voltage across

volt supply output Normal

+

110

volt supply output

Q424

CR425

Q423

from

is

to emitter

and

meas-

below

+

370

0

volt Greater than 0

volt Greater than

Normal Abnormal

Output remains low

~~

Output

rises

I

0

volt

6

volts

2

volts

2

volts

Q423

good

Q424

shorted

Q424

good

Q425

shorted

-25

good

Trouble in

supply

Trouble in

supply

Q421, Q422,

9423

open

Q421, Q422,

I

a23

good

CR425 CR425

shorted good

+

110

+

370V

+

llOV

or

*6.3V

01526-1

High output (Voltmeter from

+

6.3V

to

-6.3V

output)

Short collector of

Check

Disconnect base lead of

-100

printed circuit board. This blue lead which connects edge of board adjacent to the

5651

reference tube.

Q425

to

volt supply output

Q482

emitter

from

is

to

front

V461,

Output remains low Output rises

Normal

Abnormal Trouble in

the

Output drops

Q424

open

Q425

open

Trouble in

supply

shorted

+6.3V

-1OOV

5-15

Section Paragraphs 5-77 to 5-85

V

Model 175A

supply *6.3V

cont’d

Symptom

Low output

(Voltmeter from +6.3V to -6.3V output)

ble 5-5.

T

Reconnect blue

voltage from collector of Q483 to emitter

Short collector of Q484 to emitter

Check -100 volt supply output

Short collector of Q483 to emitter

Remove short from Q483 and meas-

ure voltage from collector of Q483 to emitter

Measure voltage from collector of

Q484 to emitter

Measure voltage across CR483

Troubleshooting the Low-Voltage Supply (Cont’d)

Procedure Effect

wire

and measure

Trouble

0

volt

Greater than

Output drops

Normal

Abnormal Trouble in

Output remains low Q481 or Q482 open Output

Greater than 10 volts Q483 open Approx 2.5 volts Q483 good

0

volt Q484 shorted

Greater than

0

volt CR483 shorted

6 volts CR483 good

rises

2

volts

2

volts

Q483 shorted Q483 good Q484 open Trouble in *6.3V

supply

-1OOV

supply

Q481 and Q482 good

Q484 good

5-77. HIGH-VOLTAGE POWER SUPPLIES. 5-78. Waveforms and dc voltages are given

troubleshooting aid on the high-voltage power-supply

schematic diagram, figure 5-32.

5-79. The cause of an output voltage whichis too high or too low can best be isolated by measuring dc voltages. Start with the resistor divider string composed of resistors R328 through R337. Then checkvoltages on regulator tube V306 and

5-80. The cause of loss of regulation can also best

be

isolated by ode voltage in the positive direction should be sensed by V306 and appear grid, pin 9, of V301. Theplatevoltage of V301 should then increase accordingly. Likewise, change in crt cathode voltage should cause the plate voltage of V301 to decrease.

5-81. VERTICAL AMPLIFIER. 5-82.

As

and signal waveforms are given amplifier schematic diagram, figure 5-19.

5-83. UNBALANCE. Unbalance differential amplifier Vl-V4 and V7-V9 can be isolated

by

measuring the dc voltages on the various tube elements. unbalance in the vertical plug-inunit, short pins 7 of

V1

ential amplifier has equal voltages on each side of the amplifier, another method may be used to isolate an unbalanced stage. Proceed

this

method. A changein the crt cath-

as

a troubleshooting aid, nominal dc voltages

In

order to eliminate the effect of any

together. Since a properly operating differ-

rf

oscillator tube V301.

apositive change

on

in

as

outlined in table 5-6.

at

the vertical-

direct-coupled

as

the screen

a

negative

2

and

5-84. IMPROPER GAIN. Insure that the vertical

a

plug-in unit gain amplifier cannot be

Control R45. If not, mechanically center R45, and set up the conditions of waveform measurements given in the vertical-amplifier schematic diagram notes, figure 5-19. To isolate the cause of abnormal gain, check the gain of each stage of the amplifier against the waveforms given from the input.

5-85. COMPRESSION. The compression of the ver-

tical amplifier can be checked in the following manner:

a.

Connect a 1-kc sine wave signal to vertical

INPUT.

b. Connect from ground to the vertical crt deflection plates, D3 and D4. CAUTION: +300 VOLTS present on both terminals.

c. Vertically center the

just the sine wave amplitude andvertical SENSITIVITY

for

a

reading of 1.0 volt on voltmeter. d. Position the trace to the top of graticule. e. The voltmeter reading should be 1.0 volt *0.05

volt.

f.

Position the trace to the bottom of graticule.

g. The voltmeter reading should be 1.0 volt

volt.

is

correct and that the gain of the

set

properly by adjusting Gain

in

figure 5-19 starting

a

high-impedance ac voltmeter isolated

trace

on the crt, and ad-

*0.05

5-16

01526-1

Model

Short

175A

to

V

5-92

Section

Paragraphs

High-

6

of

V8

and pin 6 of

V9

together

Trace does not center Trace centers Before

or

power supply, or crt

crt

5-86

low-voltage

Remove short from

3

and 8 of

Remove short from pins

pins

Remove short from

V4

of

Remove short from

of

V3

Remove short from

of

V2

Remove short from

V1

of

5-86.

If

sion,

the cause can be isolated by moving the voltmeter to the grids of the preceding stage and repeating steps c through g. Move the voltmeter from the deflection plates to pin

2

and 7 of

a

correct compression reading

is

located between

and

the

5-87.

SWEEP GENERATOR.

5-88.

Nominal dc voltages and waveforms are given

as

a

troubleshooting

matic diagram,

If

5-89.

the SWEEP MODE control TRIGGER associated with

5-90.

If

erly with the SWEEP MODE control in FREE RUN, ensure

amplifier by checking the horizontal amplifier for proper operations.

5-91.

If

most likely associated with

VlO9.

lem can most easily

generator to remain in one of

state

is

this

state

normally present sweep voltage. The other

known

remains at the starting level sweep Voltage.

V7

2

and

7

together

the amplifier exhibits excessive compres-

V7;

preceding one.

the sweep generator operates properly when

or

PRESET, the problem

the

sweep generator does not operate prop-

that

the problem

the

problem

Since this circuit utilizes feedback, the prob-

known

the output remains at the peak level of the

as

the

reset

V8

and

V9

and short pins

together

3

of

V7

together

V2

then to pins 2 and 7 of

that

aid

figure

V101,

CR102,

is

be

as

the sweep completed state. In

state.

and 8 and short

V7

and short pins 2 and

V4

and short pins 2 and

V3

and short pins 2 and

2

of

V8

and

V9;

then to pins

V4,

is

obtained, the trouble

particular measurement point

on the sweep-generator sche-

5-23.

is

in FREE RUN but not in

is

most likely

Q103,

or

R170.

is

not in the horizontal

in the sweep generator,

V103

through

isolated by forcing the sweep

its

two states. One

In this

of

state,

the normally present

7

etc. When

it

is

V107

or

state

is

the output

Trace does not center Trace approx centers

Trace does not center Trace approx centers Before

Trace does not center Trace approx centers Vertical plug-in unit

5-92.

To troubleshoot the sweep generator, put the sweep generator in each of these states as explained in table

values given in table

from the values given can be expected; however, larger variations indicate

Test Point

V103 V103 V103 V103 V104 V104 V104 V104 V104 V106 V106 V107 V107

V105 Pin

V105 V109 V109

*

**

5-7

and check the dc voltages against the

Table

5-7.

roubleshooting Guidf

Sweep Completed*

7

6

3

2

3

1

7

8

9

6

2

3 7

8

3

Sweep Completed: Remove Reset: Remove

pin 7 of

~~ ~~~~

V103

V8, V9, V10

Before

V8

and

v7

V7

v4

Y4

v3

V3

v2

V2

v1

5-7. A 10%

a

source of trouble.

SweeD Generator

-

100

+110

+52

-16

-17

-6

-52

+80

-6.4 +310 +81

+E1

-6.7

-1.1

-100

-

100

V109

from socket and ground

V9

or

15%

variation

Reset**

0

+6.5

-

24

-

20

-52

-2.1

-3.8

-51

-

50

-4.4 +70

-56

-

50

-

74

-65

0

from socket.

01526-1

5-17

Section V Paragraphs 5-93 to 5-98

Model 175A

Table 5-

Procedure Effect

Connect DC Voltmeter to pin 2 of V204.

0

Adjust HORIZONTAL POSITION for

reading of

Measure voltages

1

Measure voltages at pins 3 and

0

of V205

volt.

‘V

J

at

pin 1 of V204 and

j.7

I

8

of V208

Correct reading Voltages unequal

Voltages approx equal Voltages unequal

Voltages approx equal

5-93. HORIZONTAL AMPLIFIER. 5-94. Signal waveforms and their associated dc levels

are given

as

a

troubleshooting aid on the horizontal-

amplifier schematic diagram, figure 5-29. 5-95. If the horizontal amplifier appears to operate

properly with the HORIZONTAL DISPLAY in any of the external input positions, but not in internal sweep positions, the trouble

is

most likely in the sweep

generator.

5-96. If the horizontal amplifier appears to operate properly with the HORIZONTAL DISPLAY in the

internal sweep positions, but not in any of the external input positions, the trouble

is

most likely associated

with the horizontal input amplifier.

volt reading impossible

5-97. UNBALANCE. The cause of unbalance in the

horizontal amplifier will most likely be associated with V204, V205, V208, or V209 since these are the only stages connected in the differential configuration.

Measurement of dc voltages on each side of the amplifier

is

the best method to use to isolate the cause of unbalance because of the feedbackused in the amplifier. Proceed as in table 5-8.

5-98. GAIN.

ensure

that

it

Adj R213, X1 Gain Adj R225, or X10 Gain Adj R227.

The waveforms given on the schematic diagram, fig-

ure 5-29, provide information on the gain of each

stage. Start at the input and proceed toward the

deflection plates.

Trouble R262 or V203 Input circuitry good V204 or V205

V204 and V205 good V208 or V209

V208 and V209 good

If

the amplifier has the wrong gain,

cannot be corrected by adjusting Gain

5-18

01526-1

Model

175A

Section

Figure

V

5-12

V305

V304,

T301,

V303,

V302.

V301

\

RIO

BELOW BELOW

R9

\

I

A2

V4 0421 V7

DLI

/

v8

/

v9

/

'

L48

'

v2

A30

V30t

L304

INSIDE

V309

R353

R351,

0

/

-

\

'VI

\VI

\

\JI

'

I

VI2

C48l

-

MP-S-I203

Figure

01526-1 5-19

5-12.

Model

175A

Component Locations,

Top

View

Section

Figure

V

5-13

A1002 R116 R262

\

BEYW

R263

\

Model

175A

\

\-

\

\\

vi01

A201

v103

v109

a101

v105

v104

v107

V

IO6

V461

A401

1481

~

R481

ELC

T4dl CR481 C488 CR482 C401 C402

Figure

5-20 01526-1

5-13.

Model

175A

Component Locations, Bottom View

0423

0461

0442

0441

Model

175A

Figures

Section V

5-14

and

5-15

V309 V306 AI

A201

L481

v4

/

R424 R422 R443 R462

A2 V3

I

DLI

\

Figure

V301 V304 V305 A302 T301 V302 V303 A301 V309

5-14.

Model

175A

Component Locations, Right Side

/

R312

/

C313

View

01526-1

Figure

5-15.

\

T40

Model

I

175A

Component Locations,

AI01

v

Left

Side View

MP-S-1206

5

-2 1/5 -22

Figure

5-16. A1

Vertical-Input Assembly

Component Locations

(Left: Top, Right: Bottom)

5-23

R7a

L

i

I

C25

Figure

5-17.

Section V Figure 5-17

Model

175A

r

R3

R39

L

,A2 Vertical-Output Assembly Component Locations

I

5-24

R48

L24

Q

OQ

R50

rp

-

R64

3

R

69

R71

R

74

1

MP-M-

95

01526-1

Model

175A

LI

2

R26 LIO

R25 L9

LII

~

5

3

C/O

c45

In

0

Q)

a

-A-

I

R19

lv2

I

f

L?

VI

L8

R20

R18

-

VI2

R7

C5

~49

R92

C

52

I

R84

R88

I

R90

I

646

I

c5

L3

(c

d

0

R8C

R93

a

R15

-

R96

I

-

a

M

-

a

t

0-C

e

R9TR[

D-

-

MP-

M-96

01526-1

Model 175A

SCHEMATIC DIAGRAM NOTES

VERTICAL AMPLIFIER

1.

Resistance in ohms, capacitance in picofarads, inductance in microhenries unless otherwise indicated.

2.

All

triodes type 6DJ8.

3.

Signal lines weighted.

4.

Conditions

a.

Disconnect all

b.

Set SWEEP MODE to FREE

c.

Center trace with VERTICAL POSITION.

of

dc voltage measurement:

signal

inputs.

RUN.

5. Conditions of waveform measurement:

a.

Connect 10 VOLTS CALIBRATOR to vertical

b.

Set: VERTICALSENSITMTY

TRIGGER SOURCE.

VERTICAL POSITION

. . . . . . .

. .

.

. . .

.

2VOLTS/CM

. . . . .

. .

to center trace

INPUT.

INT.

01526-1

R321

R234

I

Figure 5-18. Beam-Finder Switch S1,

Mounted Components

MP-S-12141

I

Sectionv

j

Figures 5-20

to

5-22

SWEEP

GENERATOR

WAVEFORMS

Model 175A

SCHEMATIC DIAGRAM NOTES

SWEEP GENERATOR

1.

Resistance

in microhenries unless otherwise

2.

All

triodes

3.

Signal

4.

Conditions of dc voltage measurement:

a.

Disconnect

b.

Set: SWEEP MODE.

TRIGGERSLOPE. TRIGGER LEVEL HORIZONTAL DISPLAY

5.

Conditions of waveform measurement:

a.

Connect a 2-kc 1-volt p-p sine

.

oscillator

b.

Set

SWEEP MODE TRIGGER SLOPE TRIGGER SOURCE. TRIGGER LEVEL..

SWEEP

SWEEP OCCURRENCE.

HORIZONTAL POSITION

in

ohms,

type

lines

weighted. Feedbacklines weighted withdashes.

6DJ8.

all

signal

capacitance

inputs.

..............

...............

..............

............

to

TRIG INPUT.

..............

...............

...........

TIME

...........

............

in

picofarads, inductance

indicated.

wave

from anaudio

.o.i

MSEC~CM

........

......

.NORMAL

to

center trace

PRESET

i

.

X1

PRESET

EXTAC

.,

+

0

+

0

5-26

01526-1

I

'ERTICAL AMPLIFIER

WAVEFORMS

,

PNK-

I

tllO(A)+ btIIOV(A)

t9ov

TO

OUTPUT

CIRCUIT

BOARD

-IOOV FROM

DUTPUT CIRCUIT

BOARD

JI(4)

-IOOV TO VERT PLUG-IN

+

"":

,

I

pUFp5UF

t9ov

AI VERT

175A-65F

INCUT

ASSY

--

SYNC

VII

AMPLIFIER

a

vi2

+IIOVIAI

+

I I

OV(A)

4

--

I

4-

-

-lOoV-b-+

I7SA

165F

rJGOUTPUT ASSY

AI VERT INPUTASSY

--

t21ov

+

-

I

-

AMPLIFIER

FOLLOWER

v3

I

.33

i

I

DLI

It-

'RSI

:e20

R33 330

JLCR3

(-

t187V

I

WF-Y-187

t

IIOV(A)

R26

I50

LI

2

LIO

I

1

+210v

d

s!

0

-

9-

a

Ti-

C125

C127

In

R156

R154

R143

R161

I

b

9

a

>

C128

R163-

VI05

c153

R138

-

d

0

0:

0

Q)

b,

U

L

"

VI09

U

!?

v!2

a

I

c112'

R114

L103

c109

R113

(u

,I

'

--I

I:

I

L

R162

Figure

5-20.

I

C142

I

A101

Sweep-Generator Assembly Component Locations

I

MP-S-1161

R173 R171

R108 R107

R106

Figure

Cl05

5-21. A102

Trigger-Source Switch Assembly,

Mounted Components

Rl72

SI03

Ci40

MP-S-

120i

Figure

Rl09

5-22. A103

R105

C107

Trigger-Level

MP

and

Switch Assembly, Mounted Components

-

S

-

-Slope

120E

c

5

a

4

8

0

V

d

(0

n

W

d

0

2001Y

COOlM

COOlY

0

K

EOOlY

-

0

a

:.

.....

..

...

~

..,

,

...

'1.

,

.:

. ..

0

I

bl

a

I

i

z

6

n

Y

a

x

J

m

z

U

?

r

-

0

'(u

-a*

C2O7

I

R211

R209

v202

R213

Figure

5-27.

A201

Horizontal

Amplifier Assembly Component

UP-s-1164

Locations

Section

Figures

v

5-27

ad

6-28

1.

Rensietance

unless

2.

Signal

3.

C~nditi~~

SCHEMATIC DIAGRAM NOTES

HORIZONTAL AMPLIFIER

in

ohms,

otherwise indicated.

lines

weighted. Feedback

of

sweep-voltage waveform measurements:

capdtance

in

picofarads,

lines

weighted with dashes.

Model 175A

inductance in microhenries

a. Waveforms are ehownforX1 andXl0

b.

Sek

VERTICALSENSITIVITY.

SWEEP "RIGGERgOURCE TRIGGERSLOPE.. TIUGGERLEVEL SWEEP MODE.

HORIZONTAL POSITION

4.

Coldftio~

a.

Connect

b.

Set:

HORIZONTAL DISPLAY. EXTERNAL VERNIER. H0RIZONTALPOSI"ION

TIME

...........

.............

...........

of

HORIZ.

10

VOLTS CALIBRATOR

INPUT

..........

.....

waveform meamrements:

...

....

setting

....

2VOLTS/CM

to center trace

to

HORIZ.

1

VOLT/CM AC

tocentertrace

ofHORIZONTAL DISPLAY.

1

MSEC/CM

INT.

+

.O

PRESET

INPUT.

CAL

5-30

Figure

R201

6-28.

C203

A202 Horizontal Display

Mounted

C201

R202

Component.

C204

Switch

UP-S-IPII

Assembly,

01526-1

0

Y

2

-

Figure

5-30.

A301

High-Voltage

and

Calibrator Assembly Component

Locations

Section V Figures

5-30

and

5-31

1.

Resistance in unless otherwise indicated.

ohms,

SCHEMATIC DIAGRAM NOTES

HIGH-VOLTAGE POWER SUPPLY

capacitance

in

picofarads, inductance

in

microhenries

Model

175A

DC voltage

2.

weighted with

3.

Conditions of dc voltage

a.

Connect

b. Set:

VERTICAL SENSITIVITY.

SWEEP MODE. TRIGGER SOURCE

TRIGGER SLOPE TRIGGER LEVEL. HORIZONTAL POSITION. VERTICALPOSITION

and

dashes.

10

VOLTS CALIBRATOR to vertical INPUT.

calibrator output

and

lines

are

weighted. Feedback lines are

waveform measurements:

.....

2

VOLTS/CM

............

...............

..............

....

.

to

center center

PRESET

INT.

+

0

trace trace

122 C323 L303 L302 L301 R339 R312 C313 C312

c3

b

k

C310 R310 R311 C311

Figure

5-31. A302

I

--.

Y

High-Voltage Deck

Assembly

Component

\

Locations

\\

MP-S-

'\J

1212

I

5-32

01526-1

DDDDDDD

D

>

-

i

I-

I

N

__I

ii

-+

KB

-==

I

R485

I

CR461 CR441 CR421

R486

0483

I

,

*

cb

3

4-L

CR463 CR443

I

CR464

CR444

C4"I

CR423

'z

CR424

*-*-

a

C428

V461

-

0464

R473

0463

-5

R464

$

K

-

h

R472 R451

-

R4

R431

c444

2444

0443s

0425

a-0

a

*

N

*

t

s

t

-a-

YP-

S

-

1163

Figure

5-33.

A401

Low-Voltage

Power

Supply

Component

Locations

Section Figure

V

5-33

Model

175A

'

1.

Resistance

2.

DC

3.

AC

4.

Conditione

a.

b.

in

ohms,

voltage

voltage values

Line voltage 115

Set

lines

are

of

dc

voltage

HORIZONTAL

SCHEMATIC

LOW-VOLTAGE POWER SUPPLY

capacitance

weighted. FeedbecLli;dware weighted

are

rms.

and

volts

ac.

DISPLAY

DIAGRAM

in

picofarode

waveform measurement:

to

1

VOLT/CM AC.

NOTES

unless

otherwise

witb

noted.

dashea

5-34

d

L

DDDPD

4.

a

m

zz

&a

'E

4

30

-

-I

*

bp

..

/---

Figure

5-35.

Heater Circuit

!2

b

a a

0711

c71

I

R717

“2

.-

E

0712

Figure

5-36.

A701

Gate-

Component

-

r-

a

YP

-

S

and

Sweep-Output Assembly

Location8

-1167

p!

b

a

Slectfon Figures

V

5-35

to

5-37

Model

175A

A701

GATE

8

SWEEP

OUTPUT ASSY

175A-65J

R713

4.7K

+6.3V

+

-lFN

R717

56

I

EMITTER-

FOLLOWERS

.OIUF

--

R714

4.7K

-1

El

OUTPUT

J71

I

lT

I

COPYRIGHI

173A

OPTON

R715

-

l9b2

BY HEWlEII-PACKARD COMPANY

OLIIAI

2351

Figure

IK

5-37.

--

-6.3V

Gate

t

GY

and

R716

IK

Sweep

--

Output

-

I

J

5-36

01526-1

r

I

\

~

Model

175A

Section

Figure

V

5-38

HORIZONTAL AUXILIARY JACK VIEWED FROM WIRED SIDE

SWEEP VOLTAGE FROM V108-b

SWEEP VOLTAGE TO S202e

+

370

V+

NORMAL-SWEEP HOLDOFF+

FROM

SI001

SWEEP HOLDOFF FROM V105B-b

SWEEP HOLDOFF TO V10984-(22

SINGLE-SWEEP HOLDOFF+

FROM

V109A ELK-ORN

SINGLE-SWEEP STOP TO V109M24

SWEEP-ARMING SIGNAL4

TO V109A

SWEEP-ARMED SIGNAL FROM+

+6.3V+

V109A WHT-RED

-17

FOAM

COVERED

FOAM

COVERED

-20

WHT-GRN

421

YEL-WHT

WHT-GRN

-(23

YEL-ORN

+27

+29

ERN<

18

(

19

26

28

JlOS

l>v

2>+TO HIGH-VOLTAGE SUPPLY,

3-

4>TlNTENSli: Y::;&;IION TO

4-CRT BLANKING FROM 5302

BLU-WHT

4-UN8~~~~I\YoZ~TE

UNBLANKING GATE

S302

-

'>v

I

0

6>-WENABLE VOLTAGE TO VI01

VIO-WHT

7

*>>pNK

+@+INTERNAL

ID+

"'GY

l3* +VERTICAL SIGNAL

+LINE TRIGGER FROM C224

TRIGGER

4-

+TO

++llOV

FROM

4-

FROM

-IOOV

SI01

vi2

-6.3V

VlOA

VERTICAL AUXILIARY JACK VIEWED FROM WIRED SIDE

VERTICAL SIGNAL TO VIB4-(9

+370V (A) FROM VERTICAL+

ALTERNATE SWITCHING GATE+

CHOPPED BLANKING TO S302+

AMPLl

Fl

ER RED-WHT VIO-WHT AMPLlFl ER

FROM C333 ORN GY

IN HIGH-VOLTAGE SUPPLY

+I

+I2

-14

-45

----(I6

l4*>TWlN LEAD

JI

I>-WVERTICAL

I

"6

R

N

4>-

5>~;~4-+llOV(A) FROM VERTICAL

6>

7+

C-IOOV FROM VERTICAL

SIGNAL

AMPLIFIER

4-

TO

+6.3V

-6.3V

VIA

e+

1

01526-1

Figure

5-38.

Connectors

5

-

3

715

-

38

Model 175A

Paragraphs

Section

6-1

to

VI

6-7

SECTION

REPLACEABLE PARTS

6-1.

INTRODUCTION.

6-2.

This section contains information for ordering replacement parts. Table numerical order of

their indicates the description and part, together

lists

parts in alpha-numerical order of their @ stock

with

any applicable notes. Table numbers and provides

each part:

a.

Description of

the

below).

b. Typical manufacturer of

list

code; see

c.

Manufacturer's stock number.

d.

Total quantity used in the instrument (TQ column).

e.

Recommended spare part quantity for complete

of manufacturers in appendix.

maintenance during one year of isolated service (RS column).

Miscellaneous parts not indexed in table

6-3.

listed

at

the

end of

table

A

=

assembly

*=

motor

B

=

capacitor

C

=

diode

CR

=

delay line

DL DS

=

device signaling (lamp)

=

misc electronic part

E

6-1

lists

parts in alpha-

reference designators and

@

stock number of each

the

following information on

part

(see

list

of abbreviations

the

part in a five-digit

6-2.

F

=

fuse

=

filter

FL

J

=

jack

K

=

relay

=

inductor

L

=

meter

M

=

mechanical part

MP

6-2

6-1

are

REFERENCE DESIGNATORS

VI

6-4.

ORDERING INFORMATION.

6-5.

To order a replacement part, address order or inquiry either to your authorized Hewlett-Packard sales representative or to

CUSTOMER SERVICE

Hewlett-Packard Company

395

Page

Mill

Road

Palo Alto, California

or, in Western Europe, to

Hewlett-Packard S.A. 54-54bis Route des Acacias Geneva, Switzerland

6-6.

Specify the following information for each part:

a. Model and complete serial number of instrument.

b.

Hewlett-Packard stock number.

c.

Circuit reference designator.

d.

Description.

6-7.

To order a part not listed in tables give a complete description of the part and include function and location.

P

Q

R RT

S

T

=

plug

=

transistor

=

resistor

=

thermistor

=

switch

=

transformer

V

W

X

Y

Z

6-1

and

=

vacuum tube, neon bulb, photocell, etc.

=

cable

=

socket

=

crystal

=

network

6-2,

its

A

=

amperes

=

bandpass

BP

BWO = backwardwave

CER CMO COEF= coefficient COM COMB composition

CONN=

CRT DEPC= deposited carbon

EIA

(cI

4

m

,-I

8

ELECT ENCAP

01

oscillator

=

ceramic

=

cabinet mount only

=

common

connection

=

cathode-ray tube

=

Tubes

or

meeting Electronic Industires' Associa-

tion standards will

normally result in

instrument operating within specifications; tubesand transistors selected for performance will be supplied by @stock numbers.

=

electrolytic

=

encapsulated

5

26-

1

transistors

best

if

ordered

F

=farads

FXD

=

fixed

GE

=

germanium

GL =glass

GRD = ground(ed)

A

=

henries

HG = mercury

HR = hour(s)

IMPG=

impregnated

INCD

=

incandescent

INS

=

insulation(ed)

K

=

kilo

=

1000

LIN

=

lineartaper

=

logarithmictaper

LOG

MEG

=

meg M = milu MINAT = minature

METFLM MFR MOM= momentary MTG

MY

IO^

=

metalfilm

=

manufacturer

=

mounting

=mylar

40-3

ABBREVIATIONS

NC

NE

NO NPO

NSR

OBD

OX

P PC PF

PP

PIV POR

pos

POLY= polystyrene POT

RECT= rectifier ROT RMS RMO

=

normally closed

=

neon

=

normallyopen

=

negative positive zero (zero temperature coefficient)

=

not separately replaceable

=

order

by

=

oxide

=peak

=

printed circuit board

=

picofarads

10-l'

=

peak-to-peak

=

peak inversevoltage

=

porcelain

=

position@)

=

ptentiometer

=

rotary

=

root-mean-square

=

rack mount only

description

=

farads

S-B

=

Slow-blow

=

selenium

SE SECT= section(s)

SI

=

silicon

=

silver

SIL

SL

=

slide

SPL = special TA

=

tantalum

TD

=

timedelay

TI

=

titanium dioxide

=

toggle

TOG TOL

=

tolerance TRIM= trimmer TWT

=

traveling wave tube

u

=

micro

VAC = vacuum

VAR

=

variable

W/

=

with

W

=

watts

WW

=

wirewound

W/O

=

without

*

=

optimum value

selected

average value

shown (part may

be omitted)

=10-6

at

factory,

6-

1

Gection Table

Circri

6-1

i

t

VI

Table

6-1.

Index by Reference Designator

Reference @Stock No. Description * Note

Circuit

Reference

~~ ~~~ ~

@I

Stock

No.

Model

Description * Note

175A

A1

175A-65F

A2 175A-65G A3 thru A100

A101 175A-65E A102 175A-19C

A103 175A-19D A104 thru A200 A201 175A-65A A202 175A-196 A203 2100-0345

A204 2100-0414 A205 thru A300 A301 175A-656 A302 175A-46 A303 2100-0349 A304 thru A400

A401 175A-65D A402 2100-0344 A403 thru A700 A701 175A-65J A702 thru

AlOOl

AlOOO

175A-65H A1002 175A-19A A1003 2100-0347 6401 3140-0020

Assembly; Vertical Input

Assembly;

Not

Assembly;

Assembly; Trigger Level

Not

Assembly;

Vertical Output

Assigned

Sweep

Trigger Source switch

Assigned

Horizontal Amplifier

&

Slope switch

Assembly; Horizontal Display switch

R:

var

quad

12K/35K/lOOK/lK

Assembly;

Not

Assembly;

R:

Not

Horizontal Position

Assigned

HV

&

Calib

HV Deck

var

quad 50K/2M/50K/9K

Assigned

Assembly; LV Power Supply

R:

var triple 2.5K/2.5K/12.5K

Assigned

Not

Assembly;

Not

Circuit Board:

Assembly:

R:

Motor:

Gate

Assigned

Sweep

var quad

fan

30W

&

Sweep

Time

4x25K ohms

Output

switch

c21 0150-0052 c22 0130-0001 C23 0150-0052 C24 0150-0052 C25 0150-0052

C26 0150-0052 C27 0150-0012 C28 0150-0012 E29 0150-0070 C30 0150-0070

C31 0150-0052 t32 0150-0012 c33 0130-0001 t34 0140-0039 c35 0130-0019

C36 0132-0004 t37 0132-0004 C38 0150-0052 C39 thru C41 C42 0140-0025

c43 0150-0070 c44 0150-0052 c45 0150-0070

C46 0150-0052

c47 0150-0070

C:

fxd

0.05pf 20% 400

C:

var cer 7-45

C:

fxd 0.05 pf 20% 400

C:

fxd

0.05Pf 20% 400

C:

fxd

0.05pf 20% 400

C:

fxd

0.05pf 20%

C:

fxd cer 0.01 pf 20% 1000

C:

fxd

cer

0.01Vf 20%

C:

fxd

cer 0.02pf 20% 500

C:

txd

cer 0.02pt2~7 500

C:

fxd

0.05pf 2070 400

C:

fxd cer

0.Olpf

C:

var cer 7-45

C:

fxd

mica 47

pf

C:

var cer 4-30

C:

var poly 0.7-3

C:

var poly 0.7-3

C:

fxd

0.05pf 2077 400

Not

Assigned

C:

fxd mica 68

C:

fxd cer 0.02pf 20% 500 vdcw

C:

fxd

C:

fxd

C:

fxd 0.05 pf 2077 400 vdcw

C:

fxd

pf

0.05pf 20% 400 cer 0.02pf 2070500

cer 0.02pf 20"/500

pf

5%

pf

10%

N500

400

20% N500

500

N650

350V 35OV

500

vdcw

1000

vdcw

1000

vdcw

vdcw vdcw

vdcw

c3 0150-0052 c4 c5 0150-0052 C6 0150-0070 c7 0150-0012

C8 0150-0012 c9 0150-0052 c10 0150-0088 c11

0150-0052 C12 thru C15

C16 0150-0052 C17 0150-0029 C18 0150-0029 C19 0150-0012 c20 0150-0012

6-2

C:

fxd

0.05

pf

Not

Assigned

C:

fxd

0.05pf 20% 400

C:

fxd

cer 0.02pf 203 500

C:

fxd

cer

0.01

C:

fxd

cer O.01pf 20%

C:

fxd

0.05 pf 20% 400

C:

fxd

cer 3.9

C:

fxd

0.05

Vf

Not

Assigned

C:

fxd

0.05

pf

C:

fxd

ti

lpf

10t

C:

fxd

ti

lpf

10%

C:

fxd

cer

0.01pf 20%

C:

fxd

cer

0.01pf

2070 400

pf

203

pf

/

0.25

20% 400

2070 400

500 500

20%

vdcw

C48 Not Assigned c49 0150-0070

vdcw

1000

vdcw

pf

500

vdcw

C50 0150-0052 C5

1

C5 2

C53 thru C104 Not Assigned C105 0150-0014 Cl06 C107

b108

vdcw

1000

vdcw

C109 0150-0070 Ell0 0150-0070 Clll C112 0150-0023 C113 0150-0023

#See introduction to this section

0150-0070 0140-0041

0150-0069

0170-0022

C:

fxd

cer 0.02pf 20% 500

C:

fxd

0.05pf 2070 400

C:

fxd

cer 0.02pf 2070500

C:

fxd

mica

100

C:

fxd

cer 500

Not

Assigned

C:

fxd

cer

.001 p f

Not

Assigned

C:

fxd

cer 0.02pf 20% 500

C:

fxd

cer

0.02

C:

fxd

my

0.M

C:

fxd

cer 2000

C:

fxd

cer

2000

vdcw

pf

5%

500

vdcw

pf

min 500

vdcw

-t10070-20% 500

pf

2070 500

20% 600 vdcw

pf

20%

1000

pf

20%

1000

vdcw

vdcw vdcw

01526-1

1

Model

li5A

~~~ ~

Circuit

Refrrrtiw @Siock No. Description

Table

3

6-1.

Index by Reference Designator

Circuit

Note

Reference

@Stock

No.

Description

*

NoLr

Section

Table

VI

6-1

C114 0150-0070 C115 0140-0092 C116

thru

C119

C120

0150-0064

C121 0140-0054

C122 0150-0081 C123 0140-0031 C124 0140-0107 C125 0130-0006 C126 0150-0081

c127 0150-0069 C128 0140-0002 C129 0140-0039 C130

thru

C139

C140 0150-0069

C141 0150-0081 C142 0140-0016 C143 0150-0069 C144 0140-0041 C145

thru

C148

C:

fxd cer

0.02pf

C:

fxd mica

240

Not Assigned

C:

fxd cer

15

pf

C:

fxd mica

100

C:

fxd cer

0.01

C:

fxd mica

220

C:

fxd mica

507

C:

var cer

5-20

C:

fxd cer

0.01pf

C:

fxd cer .001pf

C:

fxd mica

10

C:

fxd mica

47

Not

Assigned

C:

fxd cer

.001

C:

fxd cer

0.01

C:

fxd mica

390

C:

fxd cer

,001

C:

fxd mica

100

Not

Assigned

20% 500

pf

5% 500

5%

npo

500

pf

10%

500

Pf

-20"/&30% 500

pf

10%

500

pf

2"h

500

pf

N300

-20%+80"b500

t100"/-2070 500

pf

10%

vdcw

pf

5% 300

vdcw

pf

t100~0-20"/~ 500

pf

-2Wbt8Wb 500

pf

5%

500

pf

t1005b-209b 500

pf

5%

500

vdcw

C216 0140-0201 C217 C218

014U-02Ul

thru

C22U

C221 0150-0070 C222 0150-0070

C223 0150-0070 C224 0150-0086 C225 0150-0070 C226

thru

C309 Not

C310 0150-0085

C311 0150-0014

C312 0150-0036 C313 0160-0108

C314 0160-0151

C315

C316 0160-0151 C317

thru

C319

C320

C321

C322

0170-0065 0160-0151 0170-0022

C:

fxd mira

I2

C:

fxd mica

I2

Not Assigned

C:

fxd cer

0.02

C:

fxd cer

0.02pf

C:

fxd cer 0.02pf

C:

fxd cer

4700

C:

fxd cer

0.02pf

Assigned

C:

fxd cer

2200

C:

fxd cer

5000

C:

fxd cer

470

C:

fxd paper

C:

Not Assigned

C:

fxd cer

Not Assigned

C: C:

C:

fxd

fxd cer

fxd

my

fxd cer

my

470

4700

0.047pf

4700

O.lpf

pf

5%

500

vdcw

it

S':

5UU

vdcw

pf

20"h 500

20% 500

pf

20% 500

pf

20% 500

pf min

pf

20%

pf

t80-20~04000

pf

t80-20"b 4000

pf

t80-20"/04000

20%

vdcw

500

vdcw

6kv

20% 10000

10%

140

vdcw

600

vdcw

C149 0150-0070

e150

0150-0081

C151 0150-0081

C152

0150-0081

C153 0150-0081

C154

C155

0150-0081

thru

C200

C201 0170-0022 C202 0140-0004 C203 0130-0008

C204 0140-0055 C205 C206 0150-0086 C207 0150-0070

I

C208

thru

C210

~

i

'

V211

C212 C213 C214 k215

0130-0006 0131-0004 0130-0003 0140-0006 0150-0088

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd cer

Not

Assigned

C:

fxd

my

C:

fxd mica

C:

var cer

C:

fxd mica

Not

Assigned

C:

fxd cer

C:

fxd cer

Not

Assigned

C:

var cer

C:

var mica

C:

var

C

C:

fxd mica

C:fxd cer

0.02pf

0.01

O.lpf

15

pf

8-50

150

4700

0.02pf

5-20

16-150

1.5-7 82

pf

3.9

pf

20% 500

p

f

-20"/0t80% 500

pf-2W/&O%

p

f

-20%+80% 500

pf

-20%t80% 500

p

f

-2O%t80% 500

20% 600

10%

pf

500

N75b

10%

500

20% 500

vdcw

20% 500

pf

N300

pf

175

pf

500

vdcw

10%

500

vdcw

i

0.25

pf

500

vdcw

500

vdcw

vdcw vdcw

vdcw

C323 C324 C325 C325 C326

C327

C328

0170-0022 0150-0081 0160-0151 0160-0151 0150-0081

0150-0081 0150-0081

C329 c330 C331

C332 c333 C334

thru

C339

0160-0151 0160-0151

0160-0151 0140-0034

C340 0150-0052 C341 0170-0027

C342 0180-0058 C343 0170-0027 C344

thru

C400 C401 0150-0052 C402 0150-0052

C:

fxd

my

O.lPf

C:

fxd cer

0.01p

C:

fxd cer

4700

C:

fxd cer

470

C:

fxd cer

0.01

C:

fxd cer

0.01

C:

fxd cer

0.01

Not

Assigned

C:

fxd cer

4700

C:

fxd cer

4700

C:

fxd cer

4700

C:

fxd mica

22

Not

Assigned

C:

fxd

0.05pf 20"b

C:

fxd

my

0.02pf

C:

fxd elect

50pf

C:

fxd

my

0.02pf

Not Assigned

C:

fxd

0.05pf

C:

fxd

0.05pf

20% 600

f

pf

I-1

f

pf

Pf

pf pf

pf

5%

-lO~otlO~/o

2070

20% 400

vdcw

-20"/&30% 500 t80-20% 4000

80

20%

4000

vdcw

-2W/0t8V/0 500

-20%t8V/0 500

-2Wbt8Pb 500

t80-20% 4000

t80-20%4000

t80-2V/0

400

5% 200

400

500

vdcw

vdcw vdcw

4000

vdcw

25

vdcw

vdcw vdcw

vdcw

vdcw vdcw

vdcw

I

1

01526-1

~

#See introduction to this section

6-3

Section

Table

~~~

Rt.ferc.ncc

VI

G-1

Circiiil

@Stock

Table

No. Description

*

6-1.

Index

Note

by

Reference Designator

Circuit

Reference

@Stock

No.

Description

*

Model

Note

175A

C403 thru C420 Not Assigned C421

C422 0180-0024 C: fxd elect C423 C424

C425 thru C427 Not Assigned C428 C429 thru C440 Not Assigned C441

C442

C443

b444

C445 C446 thru C447

C448

C449 thru C460 Not Assigned

b461

C462

C463

C464

0180-0133

0180-0032

0160-0013

0150-0024

0180-0131

0180-0132

0150-0084

0180-0089

0150-0024

0180-0131

0180-0131 0180-0132 0150-0052

C: fxd elect 135pf

40

C: fxd elect C: fxd

C: fxd cer 0.02~f

C: fxd elect

C:

C: fxd elect 60Pf -lOtlO~/o

C: fxd

C:

Not Assigned C: fxd cer 0.02Pf

C: fxd elect C: fxd elect C: fxd elect 60Pf -lOtlOO'/o C: fxd 0.05pf 20%

10

my

O.lpf 10%

150

fxd elect

150

000

pf

fxd elect lOPf

150

-10t50'/0

pf

450

vdcw

pf

10

vdcw

400

t80'/0-20~0

pf -10t50% pf -1Ot50%

i

300

pf

200

-lO%-tlOW/o

t80~0-20gb

pf

-lot502

pf -10+50%

400

vdcw

400

vdcw

600

200

vdcw

150

600

200

vdcw

vdcw vdcw

vdcw

vdcw vdcw vdcw

C1009 ClOlO ClOll C1012 C1013

C1014 C1015 C1016 CR1

CR2

CR3 CR4 CR5 thru CRlOl Not Assigned CR102

CR103

CR104

CR105

CR106

CR107 thru CR300 Not Assigned

CR301

0140-0018

0130-0001

0140-0006

0130-0001

0140-0082

0130-0001

0140-0034

0130-0001

1910-0016 1910-0016

1910-0016

1912-0006

1901-0034

1902-0034

1901-0044

1902-0009

C: fxd mica

C: var cer C: fxd mica C: var cer C: fxd mica

C: var cer C: fxd mica

C: var cer

Semicon device diode germanium Semicon device diode germanium

Semicon device diode ger tunnel

Diode: silicon 5MA piv

Semicon device diode Semicon device diode silicon

Semicon device diode 1N755 250MW

1000

7-45

82

7-45

68

7-45

22

7-45

pf

5%

pf N500

pf

10%

500

pf N500

pf

5%

500

pf N500

pf

5%

500

pf N500

120

npo

vdcw

500

vdcw

cap-3 pf

C465

b466

C467

C468

C469 thru C480 Not Assigned

C481 b482

C483

C484 thru C487 Not Assigned

C488

C489 thru C710 Not Assigned C711 C712 thru ClOOl Not Assigned

C1002 C1003

C1004 C1005 C1006 C1007 C1008

0150-0084

0180-0059

0150-0024

0180-0134

0180-0059

0150-0052

0150-0081

0160-0015

0160-0005

0160-0010

0140-0085

0170-0018

0170-0019

0170-0017

C: fxd

000

pf C: fxd elect lOPf -1O%tlOO% Not Assiqned C: fxd cer

C: fxd elect

C: fxd elect 10Pf -lO%-tlO~o

C: fxd elect lOpf -1O%t1OoX

C: fxd 0.05~f 20%

C: fxd cer 0.01Pf -2~/0t80%500 vdcw

C: fxd paper

C: fxd

C: fxd C: fxd mica C: fxd C: fxd C: fxd my O.01pf 5%

0.02

7000

0.4M

my

0.047pf 10%

my

4700

470

my

lpf 5%

my

O.lpf 5%

i

300

pf

200

Pf t80%-20%

f -lOtlOO~o

400

vdcw

10%

200

600

pf

10%

600

pf

5%

500

vdcw

200

vdcw

200

vdcw

400

vdcw

25

600

25

vdcw vdcw

vdcw

CR302

CR303 thru CR420 Not Assigned

CR421 CR422 CR422

CR423

CR424 CR425

CR426 thru CR440 Not Assigned CR441

CR442

kR443

CR444

bR445 thru CR460 Not Assigned

bR461

CR462

CR463

CR464

CR465 kR466 thru CR480 Not Assigned

1901-0033

1901-0051 1901-0051 1901-0051

1901-0051

1902-0034

1901-0051

1901-do51

1902-0034

Semicon device diode 1N485B

Semicon device: diode spllN1566A Semicon device: diode spllN1566A Semicon device: diode spllN1566A

Semicon device: diode spllN1566A Semicon device: diode spllN1566A

Semicon device: diode

Semicon device: diode spllN1566A

Semicon device: diode spllN1566A Semicon device: diode spllN1566A Semicon device: diode spllN1566A

Semicon device: diode spllN1566A

Semicon device: diode spllN1566A Semicon device: diode spllN1566A Semicon device: diode

6-4

#See introduction

to

this section

01526-1

I

Model 175A

Table 6-1. Index by Reference Designator

1

CiI.c:uil

1

Refereiice

CR481 1901-0032 Semicon device: diode lN3209Junction CR482 1901-0032 Semicon device: diode lN3209Junrtion CR483 1902-0034 Semicon device: diode

DL1

DS401 1450-0048 Lamp:

F401

F402

thru F421 2110-0012 Fuse: Cartridge 1/2a 250v F422 thru

i

F441

F442 thru F460 Not Assigned

F461

F462 thru

F481

J1

@J

Stock No. Description

8120-0092 Cable: Delay

pilot

NE2H power

2110-0023 Fuse: Cartridge 6.25a 250v slow blow

F420

F440

2110-0033 Fuse 0.75a 250v

F480

2110-0035

1251-0007 Connector: Female 16-pin

Not Assigned

Not Assigned Fuse: Cartridge 8a slow blow

$t

on

indicator

Note

Circuit

Reference @Stock No. Descriptioii

L16

117

L18

L19

L21

L22

L23

L24

L25 thru

L31

L32

L33

L34

L35

9140-0080

9140-0024

thru L20 Not Assigned

9140-0024 Coil fxd rf:

9140-0024

9140-0024 Coil fxd rf:

9140-0088 9140-0088

L30

9140-0018

9140-0088

thru L102 Not Assigned

Coil fxd rf: Coil fxd rf: Coil fxd rf:

Coil fxd rf:

Coil fxd rf: Coil fxd rf:

Not Assigned

Coil fxd rf: 1 uhy Coil fxd rf: 1 uhy Coil fxd rf:

Coil fxd rf:

0.18

0.68

0.33

uhy uhy uhy

uhy

uhy uhy uhy uhy

uhy uhy

Section

VI

Table 6-1

f

No~r

J2 thru JlOO Not Assigned

1

JlOl 1250-0118 Connector: BNC

,

J102

thru

J104

i

J105 1251-0137 Receptacle 32 contact

~

J106

thru J200 Not Assigned

J201 1250-0083 Connector: BNC

J202 thru 5300 Not Assigned

J301

J302 G-1OD Binding post red lv calibr-ator

J303

1

J";:s"

1

J401

~

J402

'

J711

L8

I

L10

1250-0083 Connector: BNC

G-1OC Binding post: black

thru J4;:OD

1251-0148 Connector: power

thru

J710

1250-0083 Connector: BNC

1250-0083 Connector: BNC 175A-60F Coil: re,var. HI freq response 175A-60F Coil: re,var.

9140-0018

Not Assigned

Binding post red

Not Assigned

HI

freq response

Coil fxd rf: 1 uhy

1Ov

calib-rator

L103

1104

L105

L106

L201

L202

L203 L204

L205 L301

L302 9140-0072 Coil fxd rf:

L303

L304 L305

L481

P401-P402 Q103

(1104

Q301 1850-0062 Transistor germanium

Q302 1850-0062 Transistor germanium

9140-0074

9140-0121 Coil fxd1.8 uhy 9140-0121 Coil fxd

thru L200 Not Assigned

9140-0118

9140-01'18

9140-0047 9140-0047

thru

L300

9140-0075

9140-0072

G-60B Coil: alignment, pattern rotating coil

thru

L480

9110-0050

1850-0091

thru

4300

Coil fxd

rf:

10

uhy

1.8

uhy

Coil fxd

500

uhy

Coil fxd

500

uhy Coil fxd rf: 20 uhy Coil fxd rf: Not Assigned Coil fxd rf: 270 uhy

Coil fxd rf:

Not Assigned Inductor A.F.

Not separately replaceable part of W401 Transistor germanium 2N2048 PNP

Not Assigned

20

uhy

5000

uhy uhy

'

L11

I

L12

'

L13

~

L14

L15 9140-0080 Coil fxd rf:

I

01526-1

9140-0080

9140-0080 Coil fxd rf: 9140-0088 Coil fxd rf:

9140-0094

Coil fxd rf:

0.18

0.33

0.68

0.18

uhy

uhy uhy uhy iihy

#See introduction to this section

Q303 thru 4420 Q421 1850-0098 Transistor germanium PNP selected

Q422

Q423 1850-0098 Q424

1850-0098

1851-0017

Not Assigned

Transistor germanium PNP selected Transistor germanium PNP selected Transistor german tran 2N1304 NPN

6-5

Section

Table

Ci

rcu

VI

6-1

i

I

Reference

@Stock

No.

Table

Description

4t

6-1.

Index by Reference Designator

Circiii

Note

Reference

t

@Stock

No.

Descriptioti

*

Model

Note

175A

Q425 1850-0062 Q426

thru

Q440 Q441 1850-0098 11442 1850-0098 Q443 1851-0017

Q444 1850-0062 9445

thru

Q460 9461 1850-0098 Q462 1850-0062 Q463 1850-0062

9464 1850-0062 4465

thru

4480 0481 1850-0021 Q482 1850-0098 h483 1850-0062

Q484 1850-0062 Q485

thru

Q710 9711 1851-0017 (1712 1851-0017 R5 0690-1001

R6 0689-6215 R7 0687-1001 R8 0687-3331 R9 0815-0022 R10 0815-0011

Transistor germanium

Not Assigned

Transistor germanium PNP selected Transistor germanium pnp selected Transistor german tran

Transistor germanium Not Assigned Transistor germanium pnp selected Transistor germanium Transistor germanium

Transistor germanium

Not Assigned Transistor germanium Transistor germanium pnp selected Transistor germanium

Transistor germanium Not Assigned Transistor: Transistor:

R:

fxd comp

fxd comp fxd comp fxd comp

fxd

WW

1600

fxd

WW

630

2N1304 2N1304

10

620

10

33K

ohms

2N1304

2N441

10%

1W

5%

1W

10%

1/2W

10%

1/2W

5%

1OW

5%

1OW

npn

pnp

R26 0686-1515

thru

R29

R27 R30 R31

k32

R33 k34 R35 R36 R37

k38 R39 R40 R41 R42

R43 k44

R45 k46 R47

R48 k49

R50

R51 R52

0767-0020 0684-8211

0684-8211

0683-3315 0683-3315 0727-0110 0727-0110 0727-0110

0727-0110 0687-6521 0687-5621 0761-0010 0761-0010

0767-0005 0767-0005

2100-0151 0686-6215 0683-2715

0683-2715 0687-4721

0687-4721

0727-0110 0727-0110

R:

fxd comp

Not Assigned

R:

fxd met flm

R:

fxd comp

R:

fxd comp

820

R:

fxd comp

330

R:

fxd comp

330

R:

fxd depc

1.5K

R:

fxd depc

1.5K

R:

fxd depc

1.5K

R:

fxd depc

1.5K

R:

fxd comp

5600

R:

fxd comp

5600

R:

fxd met flm

R:

fxd met flm

R:

fxd met Ifm

R:

fxd

5600

R:

var

500

ohms

R:

fxd comp

620

R:

fxd comp

270

R:

fxd comp

270

R:

fxd comp

4700

R:

fxd comp

4700

R:

fxd depc

1.5K

R:

fxd depc

1.5K

150

ohms

2200

820

ohms ohms

ohms

ohms ohms

1800 1800

5600

ohms

5%

20% 2/10W

ohms

5%

ohms

10%

5%

1% 1%

1%

10%

ohms ohms

ohms

3W

5%

logb

10%

1% 1%

1/2W

5% 3W

1/4W

1/4W 1/4W

1/2W 1/2W 1/2W

1/2W

1/2W 1/2W

5%

1W

5%

3W

lin

1/2W 1/4W

1/4W

1/2W

1/2W 1/2W 1/2W

R11

0687-2201

k12 0767-0021 R13 0684-1051 R14 0684-1051 R15 0727-0110

R16 0727-0110 k17 0727-0110 R18 0727-0110 R19 0683-6805’

R20 0683-6805

R21 0767-0006

R22 0767-0006 R23 0683-3915

R24 0683-3915 R25 0686-1515

6-6

R:

fxd comp

R:

fxd met flm

R:

fxd comp

R:

fxd comp

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd comp

R:

fxd comp

R:

fxd met flrn

R:

fxd met flrn

R:

fxd comp

R:

fxd comp

F:

fxd comp

22

ohms

2700

1M

1.5K

1.5K 68

ohms

68

ohms

6500 6500

390

390 150

10%

1/2W

ohms

5%

3W

ohms

10%

1/4W

ohms

10% 1/4W

ohms

1%

1/2W

ohms

1%

1/2W

ohms

1%

1/2W

ohms

1%

1/2W

5% 1/4W

5%

1/4W

ohms

5% 3W

ohms

3W

ohms

5%

1/4W

ohms

5%

1/4W

ohms

5% 1/2W

#See introduction to this section

R53

R54

R55 k56

thru

R58

0727-0110 0727-0110

0764-0017

R59 0767-0021

R60 0767-0021

thru

k61

R62

R63 0773-0020

R

64

077?-0020

R65

R66 0683-2205 R67 0683-4305 R68 0684-2221 k69 0683-1515 R70 0683-1515

R:

fxd depc

1.5K

R:

fxd depc

1.5K

R:

fxd met ffm

Not Assigned

R:

fxd met flrn

R:

fxd met flm

Not Assigned

R:

fxd met flm

R:

fxd met flm

Not

Assigned

F:

fxd comp

22

R:

fxd comp

43

R:

fxd comp

2200

R:

fxd comp

150

R:

fxd comp

150

ohms ohms

1600

2700

2700 2700

ohms ohms

ohms cjhms ohms

1%

1/2W

1%

1/2W

ohms

5% 2W

ohms

5% 3W

ohms

5%

ohms

5%

ohms

5%

1/4W

5% 1/4W

10%

5%

1/4W

5%

1/4W

3W

5W 5W

1/4W

01526-1

Model

175A

Table

6-1.

Index

by

Reference Designator

Section VI

6-1

Table

R71 0727-0333

R72 0727-0216 R73 0727-0216 R74 0727-0333 R75

thru

R76

R77 0764-0001

R78 0764-0001

thru

R81

R79 R82 0683-1255 R83 0767-0006

R84 0687-2701

R85 0687-1051

R86

R87 0687-1511

R88 0687-5611

R89 0687-2701

R

90 0687-1051 R91 R92 0687-1511

R93 0686-7515

R:

fxd depc

402K

R:

fxd depc

136.

R:

fxd depc

136.7K

R:

fxd depc

402K

Not Assigned

R:

fxd met flm

R1

fxd met flm

Not Assigned

R:

fxd comp

1.2M

R:

fxd met flm

R:

fxd comp

27

R:

fxd comp

IM

Not Assigned

R:

fxd comp

150

R:

fxd comp

560

R:

fxd comp

27

R:

fxd comp

IM

Not Assigned

R:

fxd comp

150

R:

fxd comp

750

ohms

7K

ohms

6.2K

ohms

6500

ohms

1%

oliins

ohms

1%

ohms ohms

57 1/4W

ohms

10%

107,

10%

5%

1W

1%

1/2W

1W

5%

2W

5% 2W

5%

3W

1/2W

R120 2100-0388 R121 0686-4735 R122 0686-6825 R123 0687-5601 R124 0686-5115

thru

R125 R129 R130 R131 R132

R133 k134 R135 R136 R137

R138 R139 R140 R141

R142

R128

0727-0224 0687-5601 0773-0005 0773-0006

0727-0208

0764-0019 0764-0020 0767-0004

0687-5601

0687-8231

0693-1231

0727-0307 0727-0243

R:

var

ww

20

ohms

R:

fxd comp

47K

R:

fxd comp

6800

R:

fxd comp

56

R:

fxd comp

510

Not Assigned

R:

fxd depc

249K

R:

fxd comp

56

R:

fxd met flm

R:

fxd met flm

R:

fxd depc

lOOK

R:

fxd met flm

R:

fxd met flm

R:

rxd met flm

R:

fxd comp

56

R:

fxd comp

56

R:

fxd comp

82K

R:

fxd comp

12K

R:

fxd dep c cer

R:

fxd depc

499K

ohms

12K 15K

ohms

3900 5600 5000

ohms

1.65K

ohms

203

lin

5%

10%

5%

1%

10%

ohms ohms

5q',

1%

ohms

10%

10% 2 W

ohms

1%

2W

1/2W

1/2W 1/2W 1/2W

1/2W

5%

5W

1/2W

5%

5% 5%

1/2W

2W 2W 3W

1%

1/2W

R

94 0687-2701

R95 0684-1051 R96 0767-0006 R97 0684-4711

thru

R98

R105 RlO6 R107

R104

0687-4741 0687-1051 0686-1245

R108 R109

RllO

Rlll

R112 k113

k114

R115

,

k116

~

R117

1

k118

'

R119

0686-8225

0687-2211 0687-2211 0693-1231 0687-5601 0687-5601

0764-0021 2100-0234

0686-2205

0687-5601

R:

fxd comp

27

ohms

10%

1/2W

F:

fxd comp

1M

ohms

1Pb

1/4W

R:

fxd met flm

R:

fxd comp

Not Assigned

R:

fxd comp

R:

fxd comp

R:

fxd comp

Not separately replaceable part of

R:

fxd comp

R:

fxd

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd met flm

R:

var comp

Not Assigned

R:

fxd comp

R:

fxd

220

comp

6500

470

470K

1M

120K

8200

ohms

220 12K 56

ohms

56

ohms

9100

10K

22

ohms

56

ohms

10%

ohms ohms

ohms

5%

10%

1/4W

10%

1/2W

5%

1/2W

5%

1/2W

10%

1/2W

10%

2W

10%

1/2W

10%

1/2W

5% 2W

20%

lin

5% 1/2W

10%

1/2W

3W

1/2W

2W

S102

R143 R144 R145

0727-0243 0687-5601

thru

R150 R151 0693-4731 R152 0690-1831

R153 0687-5611 R154 0687-5601 R155 0687-5601 R156 0686-1555 R157 0687-4741

R158 0687-1051 R159 0686-2035 Rl6O 0686-1535 R161 2100-0093 R162 0693-1231

R163 0687-5601

thru

k164

R169 R170 2100-0094 R171 0686-4735

R172 2100-0348

R:

fxd depc

499K

R:

fxd comp

56

Not Assigned

R:

fxd comp

47K

R:

fxd comp

18K

R:

fxd comp

560

R:

fxd comp

56

R:

fxd comp

56

R:

fxd comp

1.5M

R:

fxd comp

470K

R:

fxd comp

1M

R:

fxd comp

20K

R:

fxd comp

15K

R:

var

20K

ohms

R:

fxd comp

R:

fxd comp

Not Assigned

R: R:

fxd comp

R:

var comp

12K

56

50K

47K

50K

1%

ohms

ohms ohms

ohms

ohms ohms

20%

ohms

ohms ohms

ohms

1/2W

1o"b

1Pb

10%

Yb

10%

5%

Iin

10%

30%

5%

20%

1/2W

2W

1W

1/2W 1/2W 1/2W

1/2W

1/2W 1/2W

1/5W

2W

1/2W

lin

1/2W

lin

1/5W

1W

01526-1

#See introduction to this section

6-7

hlodcl

175.4

Ci

IIII

i

I

Refereric.r

@Stock

R173 0686-2035 R174 0687-1841 R175 0687-5601 k176 0730-0041 R177 0727-0208

R178 0687-5601 R179 0687-2261 R180 0687-1021 R181 0724-0038 R182 0730-0153

R183

thru

R189 R190 0687-5601 R191 0687-5601 R192 0687-1011 R193 0687-5601

fxd comp

fxd comp fxd depc fxd depc

fxd comp fxd comp fxd comp

fxd depc

fxd comp fxd comp fxd comp fxd comp

Description

20K

180K

56

25.2K

lOOK

56 22M

1000

71.5K

17.4K

56

100

56

No.

R: R:

R:

Not Assigned

k:

R:

R: R:

ohms

ohms ohms

ohms

Table

10%

1%

10%

1%

10%

6-1.

$#

1/2W

1W

1/2W

1/4W

1W

1/2W 1/2W

1/2W

Index by Reference Designator

Ci

rci

I

i

Note

Reference @Stock

R228 0687-5601 R229 0727-0217 R230 R231 0687-1831 R232 0687-5601

R233 0690-2731 R234 0687-3931 R235 0767-0022 R236 0727-0233

thru

R237

R240

R241 0776-0007 R242 0687-5601 R243 0687-5601 R244 0687-5601 R245 0776-0007

No.

R:

Not separately replaceable part of

R: R:

R:

R: R:

R:

Not Assigned

R: R: R: R: R:

Descripticm

fxd comp fxd depc

fxd depc

56

140K

fxd comp

18K

fxd comp

56

fxd comp

27K

fxd comp

39K

fxd met flm

333K

fxd met flm fxd comp

56

fxd comp

56

fxd comp

56

fxd met flm

ohms

ohms ohms

4500

ohms

16K

ohms ohms ohms ohms

16K

ohms

3

10%

1%

10%

ohms

1%

5% 10% 10%

10%

5%

1/2W

5%

1/2W 1/2W 1/2W

Xoiv

A203

1/2W

1W

1/2W

3W

1/2W

7W

R194 0687-1011

thru

R195

R200 R201 0727-0261 R202 0727-0212

thru

R203

R205

R206 0687-1051 R207 0687-1031 R208 0687-2211 R209 0690-1031 R210 0687-5631

R211 0687-5601 R212 R213 2100-0154 R214 2100-0346 R215 0689-2035

R216 0689-2035 R217 0687-3341

thru

R218

R220 R221 0727-0281 R222 0687-2211

R:

fxd comp

100

ohms

10%

1/2W

Not Assigned

R:

fxd depc

900K

ohms

1%

1/2W

R:

fxd depc

lllK

ohms

1%

1/2W

Not Assigned

R:

fxd comp

1M

ohms

10%

1/2W

R:

fxd comp

10K

ohms

10% 1/2W

R:

fxd

220

ohms

10%

1/2W

R:

fxd comp

10K

ohms

10%

1W

R:

fxd comp

56K

ohms

10%

1/2W

R:

fxd comp

56

ohms

10%

1/2W

Not separately replaceable part of

R

comp

1000

ohms

30%

tin

3/10W

R:

var comp

10K

ohms

203

Iin

R:

fxd comp

20K

ohms

5%

1W

R:

fxd comp

20K

ohms

5%

1W

R:

fxd comp

330K

ohms

10%

1/2W

Not Assigned

R:

fxd depc

1.39M

ohms

1%

1/2W

R:

fxd comp

220

ohms

10%

1/2W

A203

1W

R246 0687-1011 R247 0687-1011 R248 0687-5601 R24.9 0727-0124 R250 0727-0124

R251 0687-5601

R252 0730-0069 R253 0730-0069 R254

thru

R255

R256 0687-5601

R257 0687-5601 R258 0687-5601 R259 0727-0287 R260 0687-1041 k261 0687-2251

R262 R263 R264

thru

R309 R310 0687-1011 R311 0687-1041

R:

fxd comp

100

ohms

10%

1/2W

R:

fxd comp

100

ohms

10%

1/2W

R:

fxd comp

56

ohms

10% 1/2W

R:

fxd carbon

R:

fxd carbon

R:

fxd comp

R:

fxd depc

R:

fxd depc

Not Assigned

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd depc

R:

fxd comp

R:

fxd comp

Not separately replaceable part of Not separately replaceable part of Not Assigned

R:

fxd comp

R:

fxd comp

3000

ohms

3000

ohms

56

ohms

lOOK

ohms

lOOK

ohms

56

ohms

56

ohms

56

ohms

2M

ohms

lOOK

ohms

2.2M

ohms

100

ohms

lOOK

ohms

1%

10%

1/2W

1% 1%

10%

1%

1/2W

10%

1/2W 1/2W

1W

1/2W

1/2W 1/2W

1/2W

A203 A203

R223 0693-1831 R224 0727-0218

R225 R226 0727-0149 R227

6-8

R:

fxd comp

18K

ohms

10%

2W

R:

fxd depc

180K

ohms

1%

1/2W

Not separately replaceable part of

R:

fxd depc

7.96K

ohms

1%

1/2W

Not separately replaceable part of

#See introduction to this section

A203

R312 0687-4741 R313 0836-0005 R314 0687-2731 R315

thru

R316 R317 0687-5631

R:

fxd comp

470K

R:

fxd depc

33M

R:

fxd comp

27K

Not Assigned

R:

fxd comp

56K

ohms

ohms ohms

ohms

10%

1/2W

1W

1/2w

1/2W

01626-1

Model

175A

Section

Table

VI

6-1

CirviiiI

i<rirrt*tll'r

@

St(JCl\

R318 0836-0006 R319 2100-0218 R320 0689-6235 R321 0690-1531

R322

thru

R324

R325 R326 R327

0692-6235 0687-5601

0690-1241 R328 k329

R330 R331 R332 R333 R334

0693-3351

0687-5601

0693-3351 0693-3351 0693-3351 2100-0112

Table

6-1.

NO.

R:

fxd depc

R:

var comp

R:

fxd comp

R:

fxd comp

Not Assigned

R:

fxd comp

R:

fxd comp

R:

fxd comp

Not separately replaceable part of

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

var comp

Ikscription

20M

ohms

10%

1.2M

ohms

20%

62K

ohms

5%

15K

ohms

10%

62K

ohms

Yb

56

ohms

120K

ohms

10%

3.3M

ohms

10%

56

ohms

10%

3.3M

ohms

10%

3.3M

ohms

10% 2W

3.3M

ohms

10% 2W

5M

ohms

30% 1/2W

$t

1W

lin

1W

2W

1/2W

1W

2W

1/2W

2W

Index by Reference Designator

Circuit

Note

Reference

R370 0686-1525

2W

R371 0686-6235 R372 0686-2735 R373 0686-4335 R374 0686-1035

R375 R376 0727-0394 R377 0727-0393

A303

R378 0689-1335 R379

thru

R400

R401 0687-3331 R402 0693-1201 R403

thru

R420 R421 0693-1041 R422 0816-0015

@Stock

No.

R:

R: R:

R:

Not separately replaceable part of

R: R:

R:

Not Assigned

R:

Not Assigned

R:

Descriptioti

fxd comp fxd comp fxd comp fxd conip fxd comp

fxd dep c fxd dep c fxd

13K

ohms

fxd comp fxd comp

fxd comp fxd

ww

50

1500

ohms

62K

ohms

27K

ohms

43K

ohms

10K

ohms

499

ohms

4.491K

t5%

33K

ohms

12

ohms

lOOK

ohms

10%

#+

5%

1/2W

5% 1/2W

5%

1/2W

570

1/2W

5%1/2W

1/2f

ohms

1/22

1W

10%

1/2W

10%

2W

10%

1OW

1/2W

2W

NoIv

A303

1/2W

R335 R336

R337 R338 R339

k340

R341 R342 R343

R344 R345

R346 R347 R348

R349 1350

1351 ?352 1353

thru

R359

0687-5611 0693-3351 0693-3351 0687-2731 0687-1021

2100-0349

0687-6831 0687-2241 0686-5135

0686-3335

0686-4335 0689-1135 0693-2231

0687-2251 2100-0060 0693-1031 0693-1031

R:

fxd comp

560

ohms

10%

1/2W

R:

fxd comp

3.3M

ohms

10%

2W

R:

fxd comp

3.3M

ohms

10%

2W

R:

fxd comp

27K

ohms

10%

1/2W

R:

fxd comp

1000

ohms

10%

1/2W

R:

var comp

50K-2M-50K-9K

Not separately replaceable part of

R:

fxd comp

68K

ohms

10%

1/2W

R:

fxd comp

220K

ohms

10%

1/2W

R:

fxd comp

51K

ohms

5% 1/2W

R:

fxd comp

33K

ohms

5%

1/2W

Not separately replaceable part of

R:

fxd comp

43K

ohms

5%

1/2W

R:

fxd comp

11K

ohms

5%

1W

R:fxd comp

R: R:

R:

Not Assigned

22K

fxd comp

var

20K

fxd comp fxd comp

ohms

2.2M

ohms

10K 10K

10%

ohms

20% 2W

ohms

10%

ohms

10%

lin

2W

1/2W

2W 2W

ohms

A303

30%

Iin

R423 0813-0011 R424 0813-0011 R425 0813-0011 R426 0727-0004 R427 0693-5631

R428 0687-1011

l/4

R429 0687-3311 R430 0687-8231 R431 0687-3311

R432 0730-0064

k433 2100-0344

R434 0730-0058 R435

thru

R441 0693-3331

R442 0816-0010

R443 0816-0020 R444 0816-0020 R445 0690-1831 k446 0687-1011

R440

R:

fxd

ww

330

ohms

5% 5W

R:

fxd

ww

330

ohms

5%

5W

R:

fxd

ww

330

ohms

5%

5W

R:

fxd met flm

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd depc

R:

var comp dual

Not separately replaceable part of

R:

fxd depc

Not Assigned

R:

fxd comp

R:

fxd

R:

fxd

R:

fxd

R:

fxd comp

R:

fxd comp

ww ww

ww

5000

56K

ohms

100

ohms

330

ohms

82K

ohms

330

90.

ohms

2500-12.5K

75K

ohms

33K

12

ohms

110

ohms

110

ohms

18K

ohms

100

ohms

1%

ohms

10%

5%

10%

1W

1%

1W

10%

1OW

1OW 1OW

10%

2W

1/2W 1/2W 1/2W 1/2W

2W

1W

1/2W

3W

A402

t360 0687-1551 t361 0687-2231 t362 0687-2831 t363 0687-1041

01526-1

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

1.5M

ohms

22K

ohms

27K

ohms

lOOK

ohms

10%

1/2W

10% 1/2W

1/2W

10%

1/2W

R447 0687-4711 R448 0687-8231 R449 0687-3311 R450 0767-0024 R451

#See introduction to this section

R:

fxd comp

470

ohms

10%

1/2W

R:

fxd comp

82K

ohms

10%

1/2W

R:

fxd comp

330

ohms

10%

1/2W

R:

fxd met flm

Not separately replaceable part of

13K

ohms

5%

3W

A402

6-9

Section Table

VI

6-1

Model

175A

~~

Ci

r(w

i

I

I1rfrrrnc.r

@Stock

R452 0767-0009 R453

thru

R460 R461 0693-3331 R462 0816-0010 k463 0818-0033

R464 0693-1801 R465 0690-1831 R466 0727-0137

R467 0687-2711 R468 0693-1821

R469 0687-4721 R470 0687-3331

R471 0727-0095

R472 R473 0767-0008

Table

6-1.

No.

R:

Not Assigned

R:

R: R:

R:

R: R:

Not separately replaceable part of

R:

Description

fxd met flm

fxd comp

33K

fxd ww

12

fxd ww

250

fxd comp

18

fxd comp

18K

fxd depc

5.18K

fxd comp

fxd comp fxd comp fxd depc

fxd met flm

fxd comp

270 1800

4700 33K

900

ohms

10K

107"

10%

5% 20W

10%

ohms

10%

ohms

10%

1%

ohms

*

2W

1OW

2W

1W

1%

1/2W

10%

2W

10%

1/2W

5%

3W

Index by Reference Designator

Circuit

Note

Reference

R1009 2100-0107

RlOlO

RlOll

0687-1831

0733-0009 R1012 0730-0138 R1013 0730-0138

R1014 0730-0162 R1015 0727-0391 R1016 0727-0261 R1017 0727-0392 R1018 0727-0218

R1019 0727-0204 R102O 0686-6815

A402

s1

S2

thru

SlOO

3100-0048

SlOl

@Stock

No.

R:

R: R:

R:

switch:push-button, beam finder

Not Assigned Not recommended for field replacement part of

Descriptiori

var comp

50K

fxd comp

18K

fxd depc

36M

fxd depc

9M

fxd depc

9M

fxd depc

4.54M

fxd dep c fxd depc fxd depc fxd depc

fxd depc fxd comp

1.81M

900K

450K

180K

90K

680

ohms

ohms ohms ohms

ohms

ohms ohms ohms

ohms

f

30% 1/3W

10%

1/2W

1%

2W

1%

1W

1%

1W

1%

1W

1%

1/2W

1%

1/2W

1%

1/2W

1%

1/2W

5%

1/2W

Note

1/2W

A102

R474

thru

R480 R481 0693-3311 R482 0818-0034 R483 0687-1221

R484 0690-2231

R485 0687-1511 R486 2100-0108 R487 0687-1511

thru

R488

R710

R711 0686-6835

R712 0686-6835

R713 0686-4725 R714 0686-4725 R715 0687-1021 R716 0687-1021

R717 0687-5601 R718

thru

RlOOO

RlOOl

0686-3645 R1002 k1003

R1004

kl005

R1006 0686-1245 k1007 0686-9135 kl008 0686-6835

Not Assigned

R:

fxd comp

330

ohms

10%

2W

R:

fxd ww

2.3

ohms

5%

45W

R:

fxd comp

1200

ohms

10%

1/2W

R:

fxd comp

22K

ohms

10%

1W

R:

fxd comp

150

ohms

10% 1/2W

R:

var comp

100

ohms

30%

lin

R:

fxd comp

150

ohms

10%

1/2W

Not Assigned

R:

fxd comp

68K

ohms

YYo

1/2W

R:

vxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

Not Assigned

R:

fxd comp Not separately replaceable part of Not separately replaceable part of

Not separately replaceable part of Not separately replaceable part of

R:

fxd comp

R:

fxd comp

R:

fxd

camp

68K 4700 4700 1000

1000

56

ohms

360K

120K 91K

ohms

68K

ohms

ohms ohms

ohms

10%

ohms

5%

10% 10%

5%

1/2W

1/2W 1/2W

1/2W

1/2W 1/2W 1/2W

1/3W

A1003

A1003 A1003

S102 3100-0345 5103

5104

thru

S200

s201

s202

s203 $301 S302 3101-0011

thru

S303

S400

S401 3101-0050

S402 3101-0033 S403

thru

SlOOO

SlOOl

s1002 T103 175A-60A

T104

thru

T300

T301 175A-llA T302

thru

T400

T401

v1

v2 1932-0022

v3 1932-0022 v4 1932-0022 V5

v7 1932-0022

thru

9100-0162

1932-0022

V6

switch: rotary 1 sect 2 pos

Not separately replaceable part

Not Assigned

Not separately replaceable part of Not recommended for field replacement part

Not Assigned

Switch: slide

Not Assigned

Switch: toggle-power

Switch: slide Not Assigned Not recommended for field replacement part of Not separately replaceable part of Transformer: pulse

Not Assigned Transformer: hv Not Assigned

T

power

Electron tube: dual triode

Electron tube: dual triode Electron tube: dual triode Electron tube: dual triode Not Assigned

Electron tube: dual triode

0.5 a 125

115-230v

vdc

os

R172

R214

R1009

of

A202

A1002

6-10

-+See introduction to

this

section

01526-1

1

Model

175A

Section

Table

VI

6-1

Circiiil

Rrft.rrric*r

V8 1932-0022 Electron tube: dual triode

v9

VI0 1932-0022 Electron tube: dual triode

'

v11

v12 1932-0022 Electron tube: dual triode

V13 2140-0008 Lamp glow NE-2 neon V14 2140-0008 Lamp glow NE-2 neon V15 thru VlOO Not Assigned VlOl 1932-0022 Electron tube: dual triode V102

V103 1932-0022 Electron tube: dual triode V104 1932-0022 Electron tube: dual triode V105 1932-0022 Electron tube: dual triode V106 1932-0030 Electron tube: 6CL6 nova1 pentode V107 1932-0022 Electron tube: dual triode

1

V108 2140-0008 Lamp glow NE-2 neon V109 1932-0022 Electron tube: dual triode VllO thru V200 Not Assigned V201 1932-0022 Electron tube: dual triode

@Stock

1932-0022 Electron tube: dual triode

2140-0008

No.

Lamp glow NE-2 neon

Description

*

Note

Circuit

Reference

xv1

xv2 1200-0058 Socket: 9-pin miniature tube

xv3

xv4

XV5 thru XV6

xv7

XV8 1200-0058 Socket: 9-in miniature tube XV9 1200-0058 Socket: 9-pin miniature tube

kvl0

XVll 1200-0058 Socket: 9-pin miniature tube

XV12 1200-0058 Socket: 9-pin miniature tube XV13 thru XVlOO Not Assigned XVlOl 1200-0048 Socket: tube 9-pin miniature xv102 Not Assigned XV103 1200-0048 Socket: tube 9-pin miniature

XV104 1200-0048 Socket: tube 9-pin miniature XVl05 XV106 1200-0048 Socket: tube 9-pin miniature XV107 1200-0048 Socket: tube 9-pin miniature XV108 Not Assigned

@Stock

1200-0058 Socket: 9-pin miniature tube

1200-0058 Socket: 9-pin miniature tube 1200-0058 Socket: 9-pin miniature tube

1200-0058 Socket: 9-pin miniature tube

1200-0048

No.

Not Assigned

Socket: tube +pin miniature

Description

*

No[?

V208 1932-0022 Electron tube: dual triode V209 1932-0022 Electron tube: dual triode V210 thru V300 Not Assigned

'

V301 1932-0044 Electron tube: 6CW5 (EL

~

V302 1920-0004 Electron tube: 1X2B diode

1

V303 1920-0004 Electron tube: 1X2B diode

1

V304 1920-0004 Electron tube: 1X2B diode V305 1920-0004 Electron tube: 1X2B diode V306 1932-0029 Electron tube: 12AU7 dual triode V307 2140-0008 Lamp glow NE-2 neon

1

V3O8 2140-0008 Lamp glow NE-2 neon

i

V309 G-205E-2 Crt: P31 aluminized internal graticule

~

V310 thru V460 V461

iw401

1940-0001

8120-0078 Cable power svt-18-3

Not Assigned Electron tube:

5651

86)

pentode

voltage reference

7.5

ft.

XV109 1200-0048 Socket: tube 9-pin miniature XVllO thru XV200 Not Assigned XV201 1200-0062 Socket: tube 9-pin miniature xv202 Not Assigned XV203 1200-0062

XV204 1200-0062 Socket: tube 9-pin miniature XV205 1200-0062 Socket: Tube XV206 thru XV207 Not Assigned XV208 1200-0062 Socket: tube 9-pin miniature XV209 1200-0062 Socket: tube 9-pin miniature

XV210 thru XV300 Not Assigned XV301 XV302 thru XV305 Not Assigned XV306 1200-0048 Socket: tube 9-pin miniature XV307 thru XV308 Not Assigned

HV309 kV310 thru XV460 Not Assigned kV461 1200-0053 Socket: 7-pin tube

21

22

1200-0008

1200-0037

175A-60G Coil and resistor network 175A-60G Coil and resistor network

Socket: tube 9-pin miniature

9

pin miniature

Socket: tube 9-pin

Socket: crt tube

~

01526-1

#See introduction to this section

6-1

1

Section

Table

VI

6-1

Table

6-1.

Index

by

Reference Designator

Model

175A

23 24

25

27

Z8

Z9

thru

211

212

213

214

thru

26

Z10

175A-60D 175A-60D

175A-60E 175A-60E

175A-60 175A-60 E 175A-60E 175A-60 E

E

Coil and resistor network

Coil: rf

Not

Assigned Coil: rf Coil: rf

Not Assigned

Coil:

rf

Coil: rf

Coil:

rf

Coil: rf

6-12

#See introduction to this section

01526-1

Model

175A

@I

Stock

No.

175A-4B

175A-11A

175A- 19A

175A-19B

175A-

19

C

175A- 19D

175A-60A 175A-60D 175A-60E

175A-60F

175A-6 OG

175A-65A 175A-65B

175A-65D 175A-65E

Table

6-2.

Description#

Assembly; HV Deck

Transformer: HV Assembly; Sweep Time switch

Assembly; Horizontal Display switch

Assembly; Trigger Source switch

Assembly; Trigger Level Transformer: pulse

Coil and resistor network

Coil: rf

Coil: re, var. hi freq response

Coil and resistor network

Assembly; Horizontal Amplifier Assembly; HV Assembly; LV Power Supply Assembly; Sweep

&

Calib

&

Slope switch

Replaceable

Parts

Mfr. Mfr.

28480

28480 28480

28480

8

28480 17560F

28480

Part

175AllA

175A6OA 175A60D 175A60E

175A60G

No.

TQ

1

1 1 2

5

3

2

1

Section

Table

6-2

RS

1

1 1 1

1

1 1

1

1 1

1

VI

175A-65F 175A-65G 175A-65H

175A-65J

0130-0001

0130-0003

0130-0006 0130-0008

0130-0019 0131-0004

0132-0004

0140-0002

0140-0004

0140-0006

0140-0016 0140-0018

0140-0025 0140-0031

0140-0034

0

140-0

039

Assembly; Vertical Input Assembly; Vertical Output Circuit Board; Sweep Time switch Assembly; Gate

C: var cer

C: var C

C: var cer C: var cer

C: var cer C: var mica

C: var poly C: fxd mica

C: fxd mica

C: fxd mica C: fxd mica

C: fxd mica C: fxd mica C: fxd mica C: fxd mica C: fxd mica

7-45

1.5-7 5-20

8-50

4-30

16-150

0.7-3

10

15

82

390

100 68

220

22

47

&

Sweep Output

pf

N500

pf

500

vdcw

pf N300

pf N750, pf N650

pf

175

pf 350V

pf 10% vdcw

pf 10%

pf 5% pf 5%

500

pf

570 500

pf 5% npo

500

pf 10%

500

vdcw

vdcw vdcw

500

vdcw

vdcw vdcw vdcw

vdcw

72982 72982

72982 28480

72982

28480 72982

00853 00853

28480

7

64

33 00853 76433

14655

503-OOOCOPO-l OR

503-000-B2P028R

0130-0008

Style 503-015-N650

0131

0004

5 35

-0 0

9-4R

Type KR B char. Type DR DR1415 B10

Type DR DR1482 B10 Type KR KR1339

0140

0018

RC M15 B68OK Type

K

K1322 B10 RCM15E220J CM15 E470

E5

J

1

6

1

2

1

1 1

2

1

2

1

2 1

1

1 1 1

2

1

1 1

1

1 1

1

1 1

1

0140-0039 0140-0041

0140-0054

0140-0055

0140-0082

01526-1

C: fxd mica C: fxd mica

C: fxd mica

47

100 100

150

68

pf 5%

pf 5% pf 10%

pf 10%

pf

570

300

vdcw

500

vdcw

500

vdcw

500

vdcw

500

vdcw

#See introduction to this section

76433

00853 00853

76433

00853

Type DR DR1310E5

Type K K1310 B10 RCM20B151K

Type DR DR1468 E5

1

1 2

1

6-13

Section

Table

@j3

0140-0085 0140-0092 0140-0092

0140-0107 0140-0201

0150-0012 0150-0014

0150-0023

0150-0024

0150-0029

0150-0036 0150-0052 0150-0064

0150-0069 0150-0070

VI

6-2

StockNo. Description#

C:

fxd mica

C:

fxd mica

C:

fxd mica

C:

fxd mica

C:

fxd mica

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd

C:

fxd cer

C:

fxd

C:

fxd cer

C:

fxd cer

C:

fxd cer

470

pf

240

pf

240

pf

507

pf

12

pf

O.01pf 500

pf min

200

pf

0.02pf

ti

lpf

10% 500

470

pf

0.05pf 2070 15

pf

5%

.001pf

0.02

pf

5% 500 5% 500 5% 500

2% 500

5% 500

20% 1000

+80%-20”/0 600

20% 6KV

406

NPO

+100%-20% 500

20% 500

Table

vdcw

500

vdcw

500

6-2.

Replaceable Parts (Cont’d)

vdcw vdcw vdcw

vdcw

.?9Ti

vdcw

Mfr. Mfr.

00853 00853 00853

14655 04062

56289

04222 91418

71590

78488

Type Type Type

CM15E5070G DM15C120J

H

1038

D1

Type

#6KV470 2070 05729 72982 72982 72982

2Ox503MC4

301 011 COG0 150J

#801 010X5G0102Z

821 OllX5U0203M

Part

No.

KR

KR1347 E5

DR

DR1324 E5

DR

DR1324E5

4

JF .002 20%

DD

DD203

GA

1.OPF 10%

TQ

20

17

Model

1

2 7

2 2

3

2

1

4

175A

RS

1

2

1 1

1

1 1

4

1

4

0150-0081 0150-0084

0150-0085 0150-0086

0150-0088

0160-0005

0160-0010

0

160-0

0

13

0160-0015

0

160-0 108

0160-0151

0170-0017 0170-0018 0170-0019 0170-0022

01 70-0027 0170-0065 0180-0024 0180-0032 0180-0058

0180-0059 0180-0089 0180-0131 0180-0132 0180-0133

C:

fxd cer

C:

fxd

C:

fxd cer

C:

fxd cer

C:

fxd cer

C:

fxd my

C:

fxd my

C:

fxd my

C:

fxd paper

C:

fxd paper

C:

fxd cer

C:

fxd my

C:

fxd my

C:

fxd my

C:

fxd my

C:

fxd my

C:

fxd

C:

fxd elect

C:

fxd elect

C:

fxd elect

C:

fxd elect

C:

fxd elect

C:

fxd elect

C:

fxd elect

C:

fxd elect

0.

Olpf

-2O%+8O% 500

000

pf

*300

pf

2200

pf

20% 500

4700

pf

20% 500

3.9

pf+

0.25

0.047pf 10% 4700

pf

10% 600

0.1

pf

10% 400

0.47pf 10% 200 470

pf

20% 10000

4700

pf

+

80 - 2070 4000

0.01

pf

570 400

1pf

5% 200

0.1

pf

596 200

0.1

pf

20% 600

0.02pf 570 200

my

0.047pf 10% 140 40pf

450

lOpf

10

vdcw

50pf

-lO”/+lOO~o

lOpf

-lO%+lOO%

lOFd

-lO%+lOO%

150pf

-10+50% 200

60pf

-lO+lOO”/o

135pf -10+50% 400

200

pf

500

600

vdcw

vdcw vdcw

vdcw

200

vdcw

25

25 150

vdcw

vdcw vdcw

5628

96296 56289

56289 72982

56289

56289 56289

56289

71590

84411 84411 28480 09134

84411 56289 56289 56289 56289

56289 56289 00853 00853 00853

CK63AW103X DD310E202SDl

CK2AX222M

C

K

2 AW4 7 2

M

CC20CH3R9C

160P47396 160P47296

160P104 94 109P47492

184P4710100

DA172 097CB

Type

HEW

620S/

4

.Ol

0170 0019

Type

27

Type

600

UE

20352 158P47391R4 D32441 30D147A1

Type

30D186A1

30D182A1

30D218A1

PLI PLI PLI

13

2

1

2 2

1 1

1

7

1

1 1

4

2

1 1 1 1

3

1

4 2

1

3

1

1 1

1

2

1 1

1

1 1

1

1 1 1

1

6-14

#See introduction to this section

01526-1

Model 175A

Section

Table

VI

6-2

~ ~~

@

Stock

No.

0

180-0 134

0683-1 255 0683-1515 0683-2205

0683-2715

0683-3315

0683-3915 0683-4305 0683-6805 0684-1051

0684-2221 0684-4711 10684-8211 0686-1035 0686-1245

0686-1515 0686-1525 0686-1535 0686-1555 0686-2035

C:

fxd

elect

700pf

R:

fxd comp

R:

fxd cornp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp 1M ohms

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd cornp

R:

fxd cornp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

F:

fxd

cornp

1.2M 150 22 270

330

390 43 68

2200

470

820 10K 120K

150 1500 15K

1.5M 20K

Table 6-2. Replaceable

Description#

-10+100~0 25

ohms

5% 1/4W

ohms

5% 1/4W

ohms

5% 1/4W

ohms

5% 1/4W

ohms

5% 1/4W

ohms

5% l/4W

ohms

570 1/4W

ohms

5% 1/4W

1070 1/4W

ohms

10% 1/4W

ohms

10% 1/4W

ohms

10% 1/4W

ohms

5% 1/2W

ohms

5% li2W

ohms

5% 1/2W

ohms

570 1/2W

ohms

5% 1/2W

ohms

570 1/2W

ohms

5% 1/2W

vdcw

Parts

(Cont’d)

Mfr.

56289 36D3070T

01121 CB 1255 01121 CB 1515 01121 CB 2205

01121 CB 2715 01121 CB 3315

CB

01121

3915 01121 CB 4305 01121 CB 6805

01121 CB 1051

01121 CB 2221 01121 CB4711

01121 CB 8211 01121 EB-1035

01121 EB-1245

01121 EB-1515 01121 EB-1525 01121 EB-1535 01121 EB-1555 01121 EB-2035

Part

No.

TQ

RS

11

21

11

21

21 11

21

31

11 11

21

11

21

11

11 21

0686-2205

0686-2735 0686-3335 0686-3645

D

68 6-4 335

D

68 6-4 7 25

0

68 6-4 735

0686-5115 0686-5135

0686-6215

0686-6235

b686-6815

b686-6825

b686-6835

b686-7515

0

686-8225 0686-9135 10687-1001

0687-101 0687-1021

1

R:

fxd

R:

fxd comp

R:

fxd comp

R:

fxd cornp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd cornp

R:

fxd comp

R:

fxd

R:

fxd cornp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

cornp

comp

22

ohms

27K 33K 360K 43K

4700

47K 510 51K 620

62K

680 6800 68K 750

8200 91K 10

ohms

100 1000

ohms ohms

ohms

ohms ohms ohms ohms ohms

ohms

ohms ohms

ohms

570 1/2W

5% 1/2W

570 1/2W

5% 1/2W 570 1/2W 5% 1/’2W 5% 1/2W 570 1/2W

5% 1/2W

570 1/2W

5% 1/2W

570 1/2W 5% 1/2W

10%

1/2W

10% 1/2W

01121 EB-2205 01121 EB-2735

01121 EB-3335

01121 EB-3645 01121

EB-4335

01121 EB-4725 01121

E

B-4 7 35 01121 EB-5115 01121

EB-5135

01121 EB-6215

01121 EB-6235

01121 EB-6815 01121 EB-6825 01121 EB-6835 01121 EB-7515

01121 EB-8225 01121 EB-9135 01121 EB-1001 01121 EB-1011 01121 EB-1021

11

21

21 21 11

11

11 11

31

11

11 11

11

72 41

b1526-1

#See introduction to this section

6-15

Section

Table

@?J

StockNo.

6-2

VI

Table

6-2.

Replaceable Parts (Cont’d)

Description# Mfr. Mfr. Part

No.

Model

TQ RS

175A

0687-1031

0687-1041

0687-1051 0687-1221

0687-1511

0687-1551 0687-1831 0687-1841 0687-2201

0687-2211

0687-2231

0687-2241 0687-2251 0687-2261 0687-2701

0687-271 0687-2731 0687-3311

0687-3331

0687-3341

1

R:

R: R: R:

R:

R: R:

R:

R: R:

R:

fxd fxd

fxd fxd fxd

fxd fxd fxd fxd

fxd

fxd fxd fxd fxd fxd

comp comp

comp comp comp

comp comp comp comp

comp

comp cornp

comp comp comp

comp comp comp cornp comp

10K

lOOK

1M

ohms

1200

150

1.5M 18K 180K 22

ohms

220

22K 220K

2.2M 22M 27

ohms

270 27K

330

33K

330K

ohms

10% 1/2W

ohms

10% 1/2W

ohms

10% 1/2W

ohms ohms

ohms

10% 1/2W

10% 1/’2

10% 1/2W

10% 1/2W 10% 1/2W

10% 1/2W

10% 1/2W 10% 1/2W 10% 1/2W 10% 1/2W

10% 1/2W

W

01121

01121 01121

01121 01121 01121 01121

01121

01121 01121 01121 01121 01121

EB-1031

EB-1041

EB-1051 EB-1221

EB-1511

EB-1551 EB-1831 EB-1841 EB-2201

EB-2211

EB-2231 EB-2241 EB-2251 EB-2261 EB-2701

EB-2711 EB-2731 EB-3311 EB-3331 EB-3341

3

4

3

3 3

1

5

1

2

1

3

1

1 1

1

2

1 1 1

1

1 1 1

1

1 1

1

1 1

0687-3931 0

68 7-4 7

0

68 7-4 7 2

0

68 7 -4 74

1

0687-5601

0687-5611 0687-5621

0

68 7-5631 0687-6831 0687-8231

0689-1135 0

689-1 335 0689-2035 0689-6215 0689-6235

0690-1001 0690-1031 0690-1241 0690-1531

0690-1831

1

1 1

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd comp

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

R:

fxd

comp comp

comp

comp comp

cornp

comp comp comp

comp

13K

cornp comp comp

comp comp cornp comp

comp

39K 470

4700

470K 56

ohms

560

5600 56K 68K

82K

11K

ohms

20K 620 62K

10

ohms

10K

120K

15K

18K

ohms ohms

ohms

10% 1/2W

ohms

ohms ohms ohms

ohms

+

570

ohms

10%

ohms

10% 1/2W 10% 1/2W

10% 1/’2

10% 1/2W

10% 1/2W 10% 1/2W 10% 1/2W

10% 1/2W

570

1W

5%

1W

570

1W

5%

1W

10%

1W

10%

1W

10%

1W

10%

1W

W

01121 01121

01121

01121 01121

01121 01121 01121

01121 01121

01121 01121 01121 01121 01121

01121 01121 01121 01121

01121

EB-3931 EB-4711

EB-4 72

EB-4741

EB-5 60

EB-5611 EB-5621 EB-5631 EB-6831 EB-8231

GB-1135 GB-1335 GB-2035 GB-6215 GB-6235

GB-1001 GB-1031 GB-1241 GB-1531 GB-1831

1

3

1

3

1

30

1

3

1

2

1 1

1

3

3 2 2

6

1 1

1

1 1

1

1 1

1

6-16

#See introduction to this section

01526-1

Motlel

175A

Q$

Stock

No.

0690-2231

0690-2731 0692-6235 0693-1031 0693-1041

0693-1201

0693-1231

0693-1801 13693-1821

0693-1831

0693-2231 0693-331 0693-3331

0

693-335

0693-4731

1

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

R:

fxd comp

Description#

22K

ohms

10%

27K

ohms

10%

62K

ohms

5% 2W

10K

ohms

10% 2W

lOOK

ohms

12

ohms

10% 2W

12K

ohms

10% 2W

18

ohms

10% 2W

1800

ohms

18K

ohms

10% 2W

22K

ohms

10% 2W

330

ohms

10% 2W

33K

ohms

10% 2W

3.3M

ohms

47K

ohms

10% 2W

Table 6-2. Replaceable Parts (Cont’d)

Mfr.

1W 1W

10%

10% 2W

10%

2W

01121

01121 01121 01121 01121

01121 01121 01121 01121 01121

GB-2231

GB-2731 HB-6235 HB-1031 HB-1041

HB-1201

HB-1231 HB-1801 HB-1821 HB-1831

HB-2231

HB-3311 HB-3331 HB-3351 HB-4731

Mfr.

Part

No.

TQ

1

2

1

3

1

1 1

1

2 6

1

Section

Table

6-2

RS

1

1 1

1

2

1

VI

0693-5631

0724-0038 0727-0095 0727-0110

0727-0124

0727-0137 0727-0149 0727-0204 0727-0208

0727-021 2

0727-0216 0727-0217 0727-0218 0727-0224

0727-0233

0727-0243 0727-0261

0727-0281 0727-0287 0727-0307

0727-0333 0727-0391

0727-0392 0727-0393

0727-0394

R:

fxd comp

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd carbon

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc cer

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

56K

71.5K

900

ohms

1.5K 3000

5.18K

7.96K

90K

ohms

lOOK

lllK

136.7K

140K 180K 249K 333K

499K 900K

1.39M 2M

ohms

1.65K

402K

1.81M

450K

ohms

4.491K 499

ohms

10% 2W

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

1%

ohms

170

ohms

1%

ohms

1%

ohms

1%

ohms

11.2% 1/’2W

1%

1/4W

1/2W

170

1/2W

1%

1/2W

170

l/2W

1/2W

1%

1/2W 11’2W 1/2W 1/2W

1/2W

1/2W 1/2W

1%

1/2W

1%

1/2W

1W

1%

1/2W

1/2% 1/2W

01121 1901 19701 19701

19701

19701 19701 19701

19701

19701 19701 19701

19701

19701 19701

19701 19701 19701

19701 19701

HB-5631 CF-lj4 DC-1/2 CR5 DC-1/2 CR5

DC-1/2 CR5

DC-1/2 CR5 DC-1j2 CR5

CF-1/2

DC-1/2 CR5

DC-1/2 R5 DC-1/2 BR5 DC-l/2 CR5 CF-1/2

DC-1/2 AR5

CF-1/2 DC-1/2 CR5 DC-1/2 AR5 DC-1/2 CR5

CF-1/2

CF-1/2 CF-1/2 CF-1/2

CF-l/’2

1 1

1

12

2

1

2

1

2

1

2

1

2

1

2

1

3

1

1 1

1

1 1

1

01526-1

#See introduction to this section

6-17

Section

Table

6-2

VI

Table

6-2.

Replaceable Parts (Cont’cl)

Model

175.4

~~

@

Stock

No.

0730-0041 0730-0058 0730-0064 0730-0069 0730-0138

0730-0153 0730-0162 0733-0009

0761-0010

0

764-0001

0764-0017

0

164-0019 0764 -0020 0764-0021 0767 -0004

0767-0005

0767-0006

076 7-0008 0767-0009

0767-0020

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd depc

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

R:

fxd met flrn

Description#

25.2K 75K

90.

lOOK

9M

17.4K

4.54M 36M

ohms

1800

6.2K

1600 3900

5600

9100

5000

5600

6500

10K

2200

ohms

1%

ohms

1%

ohms

ohms ohms ohms

ohms ohms

ohms

1%

1W

1%

1W

1%

2W 596

570 2W

570 2W 570 2W 570 2W

5% 2W

5% 3W 570 3W

5% 3W

1W

~ ~

Mfr.

19701 19701 19701 19701 19701

19701 19701 19701

07115

07115 07115

07115

07115 07115

07115

Mfr.

DC-1

R5

DC-1

R5

DC-1

R5

DC-1

R5

DC-1

R5

DC-1

R5

DC-1

R5 DC-2 R5 C-32 C-4

2

C-42s C-4 2

c-4

2

c-4

2

LPI-3 LPI-3

LPI-3 LPI-3 LPI-3 LPI-3

Part

No.

TQ

1

1 1 1

2

4

1 1 1

2

1

2 2

2

~

RZ

1

1 1 1 1

1 1

.1

1

1 1

1 1 1 1

1

0767-0021 0767-0022 0767-0024 0773-0005 0773-0006

07

13-0020

0776-0007 0813-0011 0815-001 0815-0022

0816-0010 0816-0015 0816-0020 0818-0033 0818-0034

0836-0005 0836-0006 1200-0008

1200-0037 1200-0048

R:

1

R: R:

R:

F:

R:

R: R:

Socket: tube

Socket: crt tube

Socket: tube

fxd met flrn fxd met flrn fxd met flrn fxd met flrn fxd met flrn

fxd met flrn fxd met flrn fxd

ww

330

fxd ww fxd

fxd fxd fxd fxd fxd

fxd depc fxd depc

ww

ww ww

ww

ww ww

630 1600

12 50 110 250

2.3

33M

20M

9-pin

9

2700

ohms

4500

ohms

13K

ohms

570 3W

12K

ohms

570 5W

15K

ohms

5% 5W

2700

ohms

16K

ohms

570

ohms

570

5W

ohms

5%

1OW

ohms

5%

1OW

ohms

10%

1OW

ohms

1070

1OW

ohms

10%

1OW

ohms

570 20W

ohms

59645W

ohms

10%

ohms

10%

pin miniature

5%

3W

570 3W

5% 5W

7W

1W 1W

07115 07115 07115 07115 07115

07115 07115

354 34

94310

35434 35434 35434 94311

35434

77764 77764 91662 72825 91662

-3

LPI

LPI-3 LPI-3 LPI-5 LP 1-5

LPI-5 LPI-7 c-5

RW29V631 FRlO

Type

GClO

50 c10 110 FR20

0

ROE45 2.3T5

BAKW BAKW

377PHSPTD. 125-3905 97094 390824

12A

2

1 1

1 1 1 1

8

3

1

1 1

2 2

3

1 1

2

1

1 1 1

1

1 1 1 1

1 1

1

1 1 1 1

2

6-18

#See introduction to this section

01526-1

Model

@

Stock

175A

No.

Table

Description#

6-2.

Replaceable Parts (Cont'd)

Mfr.

Part

No.

TQ

Section

Table

6-2

RS

VI

1200-0053 1200-0058 1200-0062 1250-0083 1250-0118

1251-0007

1251-0137

1251-0148

0-0

145

048

1850-0021

1850-0062 1850-0091

1850-0098 1851-0017

1901-0032

1901-0033 1901-0034 i901-0044 1901 -0051

1902-0009

1902-0034

!L910-0016

1912-0006 1920-0004 1921-0018

Socket: 7-pin tube

Socket: 9-pin miniature tube

9

Socket: tube Connector: bnc Connector: bnc

Connector: female 16-pin Receptacle

Connector: power

Lamp: pilot

Transistor germanium

Trans istor germanium Transistor germanium Transistor germanium pnp selected Transistor german tran

Semicon device diode

Diode: silicon Semicon device diode silicon Semicon device: diode spl Semicon device diode

Semicon device diode

Semicon device diode germanium

Semicon device diode ger tunnel

Electron tube: Electron tube: triode

pin miniature

32

contact

NE2H

power on indicator

2N441

2N2048

lN3209junction

1N485B

5MA

piv

IN755 250MW

1X2B

diode

6CM4

pnp

2N1304

120

cap-3pf

in1566A

pnp

npn

71785 91662 71785

91737

02660 02660

08717 16758

28480 87216 28480 01295

04713

07910 28480 28480 28480 01281

28480

93332

28480 86684 73445

1115111069

3901PHSPTO 1215111060 UG-l094/U 8427

264 200-1 6s 26420032s

858R

2N441

1850-0062 2N2048 1850-0098 2N1304

1

N3209

1N485B 1901-0034 1901-0044 1901-0051

1

N755

1902-0034

D2361

191 2-0006 1X2B 6C M4/E C86

11

10

2

62 41

11

11 11

11

11 11

99 11 77

44 22

11

22

11

12

11

44

11

44

22

;L

923-0030 1923-0044 1932-0022

1932-0029

1940-0001

eioo-0060 !2100-0093 2100-0094 2100-0107 2100-0108

2100-0112 eioo-0151 21 00-0154

P100-0218

21

0

0-0

234

01526-1

Electron tube: Electron tube: Electron tube: dual triode Electron tube: Electron Tube:

20K

R: var

R:

var

20K

R:

var comp

R: var comp

R:

var comp

R:

var comp

R:

var

500

R: comp

R:

var comp

R:

var comp

ohms

50K

100

5M

ohms

1000

1.2M 10K

6CL6

nova1 pentode

6CW5

(el

12AU7

5651

voltage reference

20% 2W

2096

ohms ohms ohms

ohms

30% 1/2W

2070 2/10W

ohms

3070

ohms

dual triode

lin

30% 30% 1/3W 3OYO

2070

86684

86)

pentode

73445

12859

86684

lin

1/5W

Iin

1/5W

28480 28480

28480

lin

1/3W

28480

Iin

lin

3/10W

20%

Iin

2W

Iin

2W

#See introduction to this section

28480

28480 28480 28480

6CL6 EL-86/6CW5 6DJ8/ECC 88

12AU 7

5651

2100-0060 2100-0093

00-00

21

94 21 00-01 07 2100-0108

2100-01 12 2100-0151 2100-0154 2100-0218

00-0

21

234

11

20 20

11 11

11

11 11 11

11 11

11

6-19

Section

T:ihle

($3

VI

6-2

Stock

No.

2100-0344 2100-0345

21 00-0346 21 00-0347

2 10 0-034 8

R:

var triple

R:

var quad

R:

vap comp

R:

var

R:

var comp

Description#

2.5R/2.5R/12.5K

12K/35K/lOOK/lK

10K

ohms

4x25K

ohms

50K

ohms

Table

20%

30%

2056

tin

6-2.

Iin

1W

1/4W

Iin

1W

Replaceable

Parts

(Cont’d)

Mfr.

28480 28480

28480

Mfr.

Part

2100-0346 2100-0347

2100-0348

No.

TQ

1

3

1

RS

1

2100-0349

2100-0388

2100-0414 211 0-001 2 2110-0023

2110-0033 2110-0035

2140-0008

3100-0048 3100-0345

3101-0011 3101-0033 3101-0050 3140-0020

12

0

-0 0

8

78

8120-0092 9100-01 62 911 0-0050 9140-001 8 914 0-0024

R:

var quad

R:

var

Assembly: Horizontal Position Fuse: cartridge Fuse: cartridge

Fuse: Fuse: cartridge

Lamp glow

Switch: push-button, beam finder Switch: rotary

Switch: slide

Switch: toqqle-power Motor: fan Cable: Dower

Cable: delay

T

power

Inductor A.

Coil fxd rf 1 uhv Coil fxd rf

50K-2M-50K-9K

WW-

20

ohms

1/2AMP 250V

6.25

0.75

amps

8

NE-2

1

sect 2 pos

0.5 115-230V

30

watts

SVT-18-3 7.5

F.

0.68

uhv

20%

lin

2W

amp

250V

250

volts

amp slow blow

neon

amp

125

vdc

ft.

,

slow blow

28480

75915 71400

24455

28480

42190

82821 70903

28480 28480 28480

28480

2100-0349

2100-0388

312.500 MDF 6.25

F02GR750A

MDL

8

NE2

3100-0345

4603

1032453 KH4147

9100-0162 9110-0050 91 40-00 18 9140-0024

1 1

1

1 1

1

4 4

2

9

1

10 10

20 10

9

1 1

1

1 1 1 1

9140-0047 9140-0072 9140-0074 9140-0075 9140-0080

9140-0088 9140-0094 9140-0118 9140-0121

6-20

Coil fxd Coil fxd rf: Coil fxd rf: Coil fxd Coil fxd rf:

Coil fxd rf: Coil fxd rf: Coil fxd

Coil fxd

rf

rf:

500

1.8

20

5000 10 270

0.18

0.33

0.68

uhv

uhy

uhv

uhy uhv

#See introduction to this section

28480 28480 28480 28480 28480

28480 99800 28480 28480

9140-0047 9140-0072 9140-0074 9140-0075 9140-0080

9140-0088 1537 -08 9140-0118 9140-0121

2 2

1 1

4

5

1

2

1

1 1

1

1 1 1

01526-1

Mndrl

9

Stock

175,A

No.

Table 6-2. Replaceable Parts (Cont’d)

Description#

MI

S

CELL

EN

EO

U

Mfr.

S

Mfr.

Part

No.

TQ

Section

Table 6-2

RS

VI

AC-21M C145B-73C

C14

5H-02A

C145H-03A C145H-20

C145H-44G

G-1OC

G-1

OD

G-60B G-74AT G-74AU

G-74BE

G-74D

G-74DJ

G-

74DK

G-74Q

G-205E-2 120A-20A 175A-1

G

175A-2C 175A-44A

Probe Cover: side

Assy:

handle, side

Retainer: handle

Assy:

full

module foot

Kit: rack mount

Binding post: black

1

Binding post red

Coil:

aliqnrnent, pattern rotating coil

Knob: triqqer slope

Knob: horiz. position fine

Knob: sweep time vernier

Knob: external vernier

Knob: triqqer level horiz. position

Knob: intensity, focus

Knob: triqqer source Knob: sweep mode Knob: sweep-time horizonal display.

Crt:

P31

aluminized internal qraticule Bezel Cover: delay line Panel: rear Too

cover

volt calibr-ator

adjust

28480 28480 28480

28480 28480

28480

28480 28480

28480 28480 28480

28480

28480 28480 28480

28480 28480 28480 28480 28480

AC21M C145B73C C145H02A

C145H93A

C145H20 C145H44G GlOC GlOD

G60B G74AT G74AU

G74AU

G74BE

G74D

G74DJ

G74DK

G74Q

G-205E-2

120A20A

175A1

G

175A2C 175A44A

11 11

11

21

11 11

31

11

11 11 11

11

175A-44B

14

90-0030

3150-0023

6960-0001

6980-0006

01526-1

Bottom cover Stand:

tilt

Filter: air Button: pluq Strip: trim

28480

Wee introduction to this section

175A44B

11

6-21

Appendix

Model

APPENDIX

LIST

OF

CODE

MANUFACTURERS

The following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4-1 (Name to Code) and H4-2 (Code to Name) and their latest supplements. The date of revision and the date of the supplements used appear at the bottom of each page. Alphabetical codes have been arbitrarily assigned to suppliers not appearing in the H4 handbooks.

(Sheet

1

of

21

175A

i-0

CODE

MANUFACTURER ADDRESS

NO.

McCoy Electronics Mount Holly Springs, Pa.

00136

Humidial Co. Colton. Calif.

00334

Westrer Corp. New York, N.Y.

00335

Garlock Packing Co

00373 00656

00779 00781

00815 00853 00866

00891

01121

01255 01281

01295 01349

01561

01589 01930

01961

02114

02286

02660

02735

02771

02777

03508

03705

03797

03877

03888

03954

04009

04062

04222

04298 04404 04651 04713 04732 04773

04796 04870

05006

05277

05347

05593 05624

05729 05783

06004 06136 06175

06555 06751 06812

Electronic Product;' Div. Camden. N.J.

Aerovor Cow. Amp, Inc. Harrisburg. Pa. Aircraft Radio CorP. Boonton. N.J.

Northern Engineering Laboratories. Inc.

Sangamo Electric Company.

Ordill Division (Capacitors) Marion, Goe Engineering Co. Los Anqeles. Calif. Carl E.

Holmes

Allen Bradley Co. Milwaukee, Wis. Litton Industries, Inc. Beverly Pacific Semiconductors, Inc.

Teras Instruments Inc.

Transistor Prodbcts Div. Dallas. Texas

The

Alliance Mfg. Co. Alliance. Ohio

Chassi-Trak Corp. Indianapolis,

Pacific

Amerock Corp. Rockford.

Pulse Engineering co. Santa Clara. Ferroxrube Corp.

Cole Mfg. Co.

Amphenol-Borg Electronics Corp. Radio Corp.

Semiconductor and Materials Div. Vocaline Co.

Hopkins Engineering Co. G.E. Semiconductor Products Dept.

Apex Machine

Eldema Corp. El Monte, Calif.

Transitron Electronic Corp. Wakefield, Mass.

Pyrofilm Resistor Co. Morristown. N.J. Air Marina Motors, Inc. Lor Angeles, Calif. Arrow, Hart and Hegeman Elect. Co.

Elmenco Products Co. New York. N.Y. Hi-Q Division

Elqin National Watch Co..

Electronics Division Burbank. Calif.

Dymec Division

Hewlett-Packard co. Palo Alto, Calif.

Sylvania Electric Prods Inc.

Electronic Tube Div." Mountain View. Calif.

Motorola. Inc.. Semiconductor

Prod. Div. Phoenix,

Filtron Co..

Western Division Culver Citv. Calif.

Automatic Electric Co. Northlake,

Sa

uoia

Zompany Redwood City, Calif.

P.

M.

Twentieth Century Westinghouse Electric Corp..

Semi-Conductor Dept. Youngwood, Pa.

Ultronix. Inc. lllumitronic Engineering Co.

Barber Colman Metropolitan Telecommunications Corp.,

Metro Cap. Div. Brooklyn, N.Y.

Stewart Engineering Co. Santa Cruz. Calif.

The Bassick Co. Bridgeport. Conn.

Ward Leonard Electric Lor Angeles, Calif.

Bausch and Lomb Optical Co. Beede Electrical Instrument Co., Inc. U.S. Semcor Div.

Torrington Mfg. Co., West Div.

Corp. Los Angeles. Calif.

Relays,

Inc. Van Nuys. Calif.

of

America

of

America

of

America Inc.

6

Tool Co. Dayton. Ohio

of

Aerovor Myrtle Beach, S.C.

of

In?.

Wire 6 Cable

Motor Co. Chicago

PldStiCS.

a.

of

Nuclear Corp.

New Bedford. Mass

Burlington, Wis.

111.

Hills,

Calif.

Culver City, Calif.

Ind.

Ill.

Galif.

Saugerties. N.Y.

Palo

Alto, Calif.

Chicago,

111.

Somerville, N.J.

Old Saybrook, Conn.

San

Fernando, Calif.

Syracuse. N.Y.

Hartford, Conn.

Arizona

Inc.

Lor Anqeles. Calif.

San

44,

Mateo, Calif.

Sunnyvale. Calif.

Rockford,

Rochester. N.Y.

Penacook. N.H.

of

Am.

Phoenix,

Ariz.

Van NUyS, Calif.

00015-29 Revised: 20 December 1962

CODE CODE

NO.

MANUFACTURER ADDRESS

Corning Glass Works

Ill.

111.

Ill.

07115

07126 07137

07138 07261

07263

07910 07933

07966 07980

08145 08358

00717 08718

08792

08994 09026 091 34 09250 09569

10214 10411

10646 11236 11237

11312 11534

11711

11717 11870 12697

12859

14298

14655 15909

16688

16758

18873

19315

19500

19701

20183

21226

21520

21 335

21964

24446

24455 24655

26462 26992

28480 33173 35434 37942 39543

Electronic Components Dept.

Digitran

Co.

Transistor Electronics Corp. Westinghouse Electric Corp.

Electronic Tube Div. Elmira, N.Y.

Avnet Corp.

Fairchild Semiconductor Corp. Continental Device Corp. Hawthorne. Calif.

Rheem Semiconductor Corp.

Shockley Semi-Conductor

Laboratories Palo Alto, Calif. Boonton Radio Corp. Boonton, N.J. U.S. Engineering Co.

Burgess Battery Co.

Sloan

Cannon Electric Co.

Phoenix Div. Phoenix, CBS Electronics Semiconductor

Operations, Div. of C.B.S. Inc. Mal-Rain Indianapolis. Ind.

Babcock Relays. Inc.

Texas Capacitor Co. Houston, Texas

Electro Assemblies, Inc. Chicago. Mallory Batter Co

Canada, Ltd. 'Toronto. Ontario. Canada

General Transistor Western Corp.

Ti-Tal, Inc. Berkeley, Calif. Carborundum Co. Niagara Falls, N.Y. CTS

Chicago Telephone Microwave Electronics Corp. Duncan Electronics. Inc. Santa Ana, Calif.

General Instrument Corporation

Semiconductor Division Newark. N.J.

Imperial Electronics, Inc. Buena Park, Calif. Melabs. Inc. Palo Alto, Calif. Clarostat Mfg. Co. Dover, N.H.

Nippon Electric Co.. Ltd. Tokyo. Japan

American Compon*nts. Inc. Conshocken.

Cornell Dubilier Elec. Corp. The Daven Co. Livingston. N.J.

De Jur-Amsco Corporation

Delco Radio Div.

E.

Eclipse Pioneer, Div.

Bendix Aviation Corp. Teterboro, N.J.

Thomas

Div. of McGraw-Edison Co.

Electra Manufacturing Co.

Electronic Tube Corp. Philadelphia, Pa.

Executive. Inc. New York. N.Y.

Fansteel Metallurgical Corp.

The Fafnir Bearing Co.

Fed. Telephone and Radio Corp.

General Electric Co. Schenectady. N.Y.

G.E., Lamp Division

General Radio Co. West Concord, Mass.

Grobet File Co. Hamilton Watch Co. Lancaster. Pa.

Hewlett-Packard Co. Palo Alto, Calif.

G.E. Receiving Tube Dept. Owensboro. Ky.

Lectrohm Inc. Chicago,

P.

Mechanical Industries Prod. Co.

Niagara Falls, Ontario. Canada

Company Burbank. Calif.

of

Berm, Inc. Beme. Ind.

1.

DuPont and Co.. Inc.

A.

R.

Mallory 6 Co., Inc. Indianapolis. Ind.

of

Edison Industries.

Nela Park, Cleveland. Ohio

of

America. Inc.

Bradford, Pa.

Pasadena. Calif.

Minneapolis, Minn.

Los Angeles, Calif.

Mountain View. calif.

Mountain View. Calif.

Los Angeles. Calif.

Ariz.

Lowell,

Mass.

Costa Mesa. Calif.

Los Angeles. Calif.

California, Inc.

So.

Pasadena. Calif.

Palo Alto, Calif.

So.

Plainfield. N.J.

Lona Island Citv 1. N.Y.

6.

M.

of

From:

..

Corp.

Kokomo. Ind.

Wilminqton. Del.

West Orange, N.J.

Kansas City.

No. Chicago.

New Britain. Conn.

Carlstadt, N.J.

Mo.

Clifton, N.J.

Akron, Ohio

F.S.C.

Handbook

H4-1

Dated: December

H4-2

Dated:

111.

Pa.

NO.

MANUFACTURER ADDRESS

4

0 9 2

0

Miniature Precision Beai

0

Muter Co.

4 2 1 9

4

3

9 9 0 C.

44655 Ohmih Mfg. Co. 4 7 9 4 8 6 2

4 9 9 5 6 Raytheon Company 5 4 2 9 4 Shallcross Mfg. Co. 5 5

5

5 9 55938 56137 56289 59446

61775

62119 64959

65092 66295

66346

70276 70309 70485

70563 70903 70998 71002

71041

71218

71286

71313 71400 71450

71468 71471

71482 71528

71590 71700

71744 71753 71785

71984 72136

72354 72619 72656

72758

72765

Ill.

72825

72928

72964

72982

73061

73138

73293

73445

73506

Ill.

73559

73682

April

A.

0

4 Polaroid Corp.

0

Precision Thermometer

Inst. Co.

0

2 6 Simpson Electric Co.

3

Sonotone Cow. Sorenson Spaulding Fibre Co., lnc. Tonawanda. N.Y. Sprague Electric Co. North Adams,

Telex.

Union Switch and Signal. Div.

Westinghouse Air Brake Co. Swissvale. Pa. Universal Electric Co. Owosso. Mich. Western Electric Co., Inc. New York, N.Y. Weston Inst. Div. of Daystrom. Inc.

Wittek Manufacturing Co. Chicago 23, Wollensak Optical Co. Rochester, N.Y. Allen Mfg. Co. Hartford, Conn. Allied Control Co., Inc. New York. N.Y.

Atlantic India Rubber Works, Inc. Amprite Co., Inc. New York, N.Y.

Belden Mfg. Co. Chicago, Bird Electronic Corp. Cleveland, Ohio Birnbach Radio Co. New York. N.Y.

Boston Gear Works Div.

Murray Co. Bud Radio Inc. Cleveland, Ohio Camloc Fastener Corp. Paramus, N.J. Allen D. Cardwell Electronic

Prod. Corp. Plainville, Conn. Bussmann Fuse Div.

Edison Co. St. Louis, CTS Corp. Cannon Electric Co. Cinema Engineering Co. Burbank. Calif. C.

P.

Standard-Thomson Corp..

Clifford Mfg. Co. Div. Centralab Div.

The Cornish Wire Co. Chicago Miniature Lamp Works

A.

0.

Cinch

Dow Corning Corp. Midland, Mich. Electro Motive Mfg. Co.. Inc.

John E. Fast Dialight Corp. Brooklyn. N.Y. General Ceramics Corp. Girard-Hopkins Oakland, Calif.

Drake Mfq. Hugh Gudeman Co. Chicago,

Robert

Erie Resistor Corp. Erie. Pa.

Hansen Mfg. Co., Inc. Princeton. Ind.

Helipot Div.

Instruments. Inc. Fullerton, Calif.

Hughes Products Division of

Hughes Aircraft Co. Newport Beach. Calif.

Amperex Electronic Co.. Div.

North American Phillips Co. Inc

Bradley Semiconductor Corp. Hamden. Conn. Carling Electric, Inc. Hartford, Conn.

George

Supplements

1962

rings. Inc. Keene. N.H.

Chicago.

Norgren Co.

6

Co., Inc.

Inc.

of

Clare 6 Co. Chicago,

of

Smith Corp., Crowley Div.

Mfg.

Corp. Chicago.

6

Co. Chicago,

Co.

H.

Eby Inc. Philadelphia. Pa.

M.

Hadley Co.

of

K.

Garrett Co., Inc.

Englewood. Colo.

Skokie.

Cambridge.

and

Philadelphia, Pa.

Lexingfon.

Selma. N.C.

Chicago,

Elmsford. N.Y.

So.

Norwalk. Conn.

St.

Paul,

of

Newark, N.J.

Chicago.

of

Texas Quincy,

of

McGraw-

Elkhart. Ind.

Lor

Angeles. Calif.

Globe Union Inc.

Bcckman

Waltham, Milwaukee. Wis.

New York. N.Y.

Chicago,

West Orange, N.J.

Willimantic. Conn.

Keasbey, N.J.

Chicago.

Lor

Angeles, Calif.

of

hickkille, N.Y.

Philadelphia, Pa.

01526-1

111.

Mass.

Ill.

Mass.

Minn.

111.

Mass.

Mo.

Ill.

Mass.

Ill.

111.

Ill.

111.

Model

175A

CODE

APPENDIX

LIST

OF MANUFACTURERS

(Sheet 2 of

Appendix

2)

CODE

NO.

MANUFACTURER

Federal Screw Products Co. Chicago,

73734

Fischer Special Mfq. Co. Cincinnati, Ohio

73743

The General Industries Co. Elyria. Ohio

73793

Jennings Radio Mfq. Co.

73905

J.

H.

74455 74861 74868

74970 75042 75173

75378 75382 75818 75915 76005 7621 76433

76487 76493 76530 76545 76854 77068

77221 77252 77342 77630

77638 77764

78 189

7 8 2 7 8 4 7 7 8 4 7 8 5 5 7 8 7 9 7 8 9 4 7 7 9 1 4 2 7 9 2 5 1 7 9 7 2 7

7 9 9 6

8

0

8

0

1

8

0 1 3

8

0

1

8

0

2 0 7

8

0

2 4

8

0

2 9 4

8

0

4

8

0

4 8 6

8

0

5

8

0

6 4

8

1

0

8

1 0 7

8

1

3

8

14

8

1 4 5

8

1

4

8

1 8 6

8

2

0

8

2 1 4 2

8

2 1 7

8

2 2 0 9

8

2 2 1 9

8

2 3 7 6

8

2

3

Winns, and Sons Winchester, Mass.

Industrial Condenser Corp. Chicago.

R.F.

Products Division of Amphenol-

eorq Electronics Corp. Danbury. Conn. E. F. Johnson Co. Waseca. International Resistance Co. Philadelphia. Pa.

Jones, Howard

of

Cinch Mfg. Corp.

James Knights Co. Sandwich,

Kulka Electric Corporation Mt. Vernon, N.Y. Lenz Electric Mfg. Co. Chicago. Littelfuse Lord Mfg. Co. Erie, Pa. C. W. Marwedel

0

Micamold Electronic Mfg. Corp.

James

J. W. Miller Co. Lor Angeles. Calif. Monadnock Mills San Laandro. Calif. Mueller Electric Co. Cleveland, Ohio

Oak Manufacturing Co. Crystal Lake, Bendlx Pacific Division of

Bendix Corp. No. Hollywood. Calif.

Phaostron Instrument and

Electronic Co. South Pasadena, Calif.

Philadelphia Steal and Wire Corp. Potter and Brumfleld. Div. of American

Machine and Foundry Princeton, Ind. Radio Condenser Co. Camden. N.J. Radio Receptor Co.. Inc. Brooklyn. N.Y. Resistance Products Co. Harrisburg. Pa.

Shakeproof DKsion of Illinois

Tool Works Signal Indicator Corp. New York. N.Y.

8

3

Tilley Mfq. Co. San Francisco. Calif.

1

Stackpole Carbon Co. St. Marys, Pa.

8

3

Tinnerman Products. Inc. Cleveland, Ohio

0

Transformer Engineers Pasadena, Calif.

Ucinite Co. Newtonville. Mass. Veedcr Root, Inc. Hartford, Conn. Wenco Continental-Wirt Electronics Cow.

Zierlck Mfg. Corp. New Rochelle. N.Y.

3

1

Mepco Division of

Sessions Clock Co. Morristown.

2

0

Schniher Alloy Products Elizabeth, N.J.

Times Facsimile Corp. New York. N.Y.

0

3

1

Electronic Industries Association

Any brand tube meeting EIA

standards Washington, D.C.

Unimax Switch, Div. of

W. L. Maxron Corn Wallingford. Conn.

8

Oxford Electric Corp. Chicago.

Bourns Laboratories, Inc. Riverside. Calif.

1

'4cro Dlv. of Robertshaw

Fulton Controls Co. Columbus

All Star Products Inc. Defiance. Ohio

Hammerlund Co.. Inc. New York, N.Y.

8 3

Stevens. Arnold, Co.. Inc. Boston, Mass.

0

3

0

International Instruments. Inc.

3

Grayhill

1

2

Winchester Electronics Co., Inc.

1

5

Wilkor Products, Inc. Cleveland, Ohio

3

Raytheon Mfg. Co.. Industrial

Components Div., Industr.

Tube Operations Newton. Mass.

8

3

International Rectifier Corp.

0

Barry Controls, Inc. Watertown. Mass.

4 2

Carter Parts Co. Skokie.

Jeffers Electronics Division of

Speer Carbon Co.

Allen

0

Maguiry Industries, Inc. Greenwich, Conn.

Sylvania Electric Prod. Inc.,

Electronic Tube

Astron Co. East Newark. N.J.

8

9

Switchcraft, Inc. Chicago,

B..

Division

Inc.

Millen

Mfg. Co., Inc. Malden, Mass.

Clfq.

Co. Chicago,

Co.

B.

DuMont Labs., Inc. Clifton, N.J.

Div.

ADDRESS

San

Jose, Calif.

Chicago.

Des

Plainer,

San

Francisco. Calif.

Brooklyn, N.Y.

Philadelphia. Pa.

Elgin,

Philadelphia, Pa.

16,

New Haven, Conn.

LaGrange.

Norwalk. Conn.

El Segundo. Calif.

Du

Bois,

Emporium, Pa.

111.

Ill.

Minn.

111.

Ill.

111.

N.J.

Ill.

Ohio

Pa.

111.

Ill.

111.

CODE

NO.

MANUFACTURER

8

2 6 4 7

Metals and Controls, Inc.. Div. of

Texas Instruments. Inc..

8 8 2 8

8 2 8

8 8 8

8 8 3 1 4 8 8 3 1

8

83

8 8

8

8 3 8

8

84396

8 8

8

8 8

8

8 8

8

9

9 0 9 7

9 1 2 6 9

9 1 4

9 1 5 0 6

9 1 6 3 7

9

9 1 7 3 7

9

9 1 9 2

9

9 3 4

9 3 9 9 4 1 4 4

9 4 1 4 5

94148

94154 94197

94310 94682

94928 95236

95238

95263 95264

Spencer Prods. Attleboro, Mass.

2

8

6

Research Products Corp. Madison. Wis.

7 7

Rotron

Manufacturing Co.. Inc.

9

3

Vector Electronic Co. Glendale. Calif.

3

0 5 3

Western Washer Mfr. Co. Los Angeles. Calif.

3

0

5

8

Carr Fastener Co. Cambridge, Mass.

3 0 8

6

New Hampshire Ball Bearing. Inc.

3

1

2 5

Pyramid Electric Co. Darlington, S.C. Electro Cords Co.

8

6

Victory Engineering Corp. Union, N.J.

Bendix Corp.. Red Bank Div. Red Bank, N.J.

3

2 9

8

330

Smith, Herman Gavitt Wire and Cable Co.,

3

5

0

1

Div. of Amerace Corp. Brookfield. Mass.

Burroughs Corp.,

3

5 9 4

Electronic Tube Div. Plainfield, N.J.

3

7 7 7

Model Eng. and Mfq., Inc.

2

1

Loyd Scruggs Co. Festus. Arc0 Electronics. Inc. New York. N.Y.

4 1 7

1

A.

3.

4 4 1 1

Good All Electric Mfg. Co.

4

9

7

0

Sarkes Tanian. Inc. Bloomington. Ind.

5

4 5 4

Boonton Molding Company Boonton, N.J.

5 4 7

1

A.

5 4 7 4 5 6 6

5 9 6 1 9 7

6 6 8 4 7 2 1 6 7 4 7

9 4 7 9 6 3 6 9 6 6 5

0

1 3 4 5

1

2 1 9 6

3 3 3

B.

R.

M.

0

Koiled Kords. Inc. Seamless Rubber Co.

1 1

Clifton Precision Products Radio Corp. of America. RCA

Electron Tube Div. Harrison, N.J.

Philco Corp. (Lansdale Division)

3

Western Fibrous Glass Products Co.

1

4

0

Cutler-Hammer. Inc. Lincoln,

2 2

0

Gould-National Batteries. Inc.

3

General Electric Distributing Corp. Carter Parts Div. of Economy Baler United Transformer Co. Chicago.

US. Rubber Co., Mechanlcal

1

7 9

Goods Div. Passaic. N.J.

Bearing Engineering Co. San Francisco, Calif.

0

Connor Spring Mfg. Co. San Francisco. Calif.

0

Miller Dial h Nameplate Co.

1

8

Radio Materials Co. Chicago,

Augat Brothers.'lnc. Attleboro, Mass.

Dale Electronics. Inc. Columbus, Nebr.

6 6 2

Elco Corp. Philadelphia. Pa. Gremar Mfg. CO.. Inc.

K

F Development Co.

8

2 7

Minneapolis-Honewell Regulator Co..

1

Micro-Switch Division Freeport,

Universal Metal Products, Inc.

3 3

2

Sylvania Electric Prod. Inc.,

Semiconductor Div. Woburn, Mass.

6 9

Robbins and Myers. Inc. New York. N.Y.

1

0

Stevens Mfq. Co.. Inc. Insuline-Van Norman Ind.. Inc.

8

3

Electronic Division Manchester, N.H.

Raytheon Mfq. Co., Industrial Components

Div.,

Raytheon Mfq. Co.. Semiconductor Div..

California Street Plant Newton. Mass.

Scientific Radio Products, Inc.

Tung-Sol Qctric, Inc. Newark, N.J. Curtiss-Wrig-p.,

Electronics

Tru Ohm Prod. Div. of Model

Engineering and Mfg. Co. Chicago,

Worcester Pressed Aluminum Corp. Telefunken Berlin,

Allies Products Corp. Miami, Fla.

Continental Connector Corp. Woodside. N.Y.

Leecraft Mfg. Co., Inc. New York. N.Y. Lerco Electronics, Inc. Burbank, Calif.

H.,

Inc. Brooklyn, N.Y.

Glesener

Co..

Inc.

Boyd Co. San Francisco. Calif. Bracamonte h Co.

Receiving Tube Operation

Div.

ADDRESS

Woodstock. N.Y.

Peterborough. N.H.

Los Angeles, Calif.

Huntington. Ind.

5.311 Francisco. Calif. Ogallala. Neb.

San Francisco, Calif.

New Haven. Conn.

Clifton Heights, Pa.

San Francisco, Calif.

Schenectadv. N.Y.

El Monte. Calif.

Wakefield. Mass.

Redwood City, Calif.

Bassett Puente. Calif.

Mansfield, Ohio

Loveland. Colo.

East Paterson. N.J.

Worcester, Mass.

Chicago,

Lansdale. Pa.

St.

Paul, Minn.

do.

Chicago,

_.

Quincy, Mass.

w.

Germany

Mo.

IU.

Ill.

111.

Ill.

111.

CODE

NO.

MANUFACTURER

952 65

National Coil Co. Sherldan. Wyo.

9

5 2 7 5

Vitramon, Inc. Bridgeport. Conn.

9 5 3 5

4

Methodc Mfg. Ce. Chicago.

9 5 9 8 7

Wrckesser Co. Chicago,

9 6 0 6 7

Hugqins Laboratories Sunnyvale. Calif.

9 6 0 9 5

Hi-Q

9 6 2 5 6 9 6 2 9 6

9

6

3

9

6

3

9 6 5 0 1 9 7 4 6 4 9 7 5 3 9

9 7 9 6 6 9 7 9 7 9

9 8 1 9 8 2 2 9 8 2 7 9

8

2

9 8 4 0 5

9

8

7 3 4

9

8

II

98925 98978 99109

99313 9951

99707 99800

99848 99934 99942

99957

THE FOLLOWING H-P VENDORS HAVE NO NUM-

BER

THE

H

AN DEOO

0

0 0 F

0

0 0 0

0

0 0

0

0 0 0

o

o o o

0

0 0

0

0 0 0

0

0 0

0

0 0 A A British Radio Electronics Ltd.

0 0 0

0

0 0

0

0 0

0 0 0 G G Goshen

0 0 0 0

0

000

0

0 0 0

0 0

0

0 0 0

0 0

0

0 0 0

0

Division of Aerovor

Thordarson-Meissner Div. of

Maguire Industries. Inc.

Solar Manufacturing Co. Los Angeles. Calif.

3

0

Carlton Screw Co.

4

1

Microwave Associates, Inc. Burlington. Excel Transformer Co. Oakland, Calif.

Industrial Retaining Ring Co. Irvington. N.J.

Automatic and Precision

Mfg. Co.

CBS Electronics,

Div.

of C.B.S., Inc. Danvers. Mass.

Reon

4

Resistor Corp.

1

Axel Brothers Inc.

0

Francis L.

8

9

1

2

1

5

ASSIGNED IN THE LATEST SUPPLEMENT TO

FEDERAL SUPPLY CODE

I

0

M

0

N Nahm-Bros. Spring Co.

P

T

0

U Tower Mfq. Cow. Providence, W Webster Electronics Co. Inc.

X

0

Y

0

2

B

C C Computer Diode Cow. Lodi. N.J.

E E

F F Carmichael Corrugated Specialties

H H

I

K K Amatom New Rochelle. N.Y. L L Avery Label Monrovia,

M

N N A

P

Q

R R

S

TT

W W California Eastern Lab. Burlingame, Calif.

X

Y Y

Mosley

Microdot, Inc.

SedhCtrO Corp.

Carad Corp. Redwood City. Calif. Palo Alto Engineering

Co.. Inc. Palo Alto. Calif.

North

Hills

Clevite Transistor Prod.

International Electronic

Columbia Technical Corp. New York. N.Y. Varian Associates Palo Alto, Calif. Marshall Industries, Electron

Control Switch Division, Controls Co. Delevan Electronics Corp.

Wilc? Corporation

Rcnbrandt, Inc. Boston. Mats. Hoffman Semiconductor Div. of

Technology Instrument Corp.

Mako Tool and

Telefunken (c/o American Western Coil Div. of Automatic

Tv-Car Mfa. Co.. Inc.

as

Soruce Pine Mica Co. Spruce Pine. N.C.

Midland

Willow Leather Products Corp. Newark, N.J.

Precision Instrument Components Co.

A. Williams Manufacturing Co.

Rubbercraft Corp. Torrance. Calif.

Birtcher Corporation. Industrial

Rubber Eng.

Atohm Electronics, Sun Valley. Calif. Cooltron

Radio Industries Control of Elgin Watch Co. Thomas

Methods Electronics, Inc. S.

Electric Co. Mineola. N.Y.

Div. of Clevite Corp. Waltham. Mats.

Research Corm Burbank. Calif.

Products Division of Amwica

Hoffman Electronics Corp. Evanston. Of Cdllf. Newbury Park. Calif.

K.

FOR

Dle

Elite)

Ind., Inc.

Instruments Inc.

Metals and Cohrols Div.

Mtq.

Co. Inc. Kansas City, Kans.

Die

Cutting Service Goshen. Ind.

Division Monterey Park. Calif.

Development Ha'yrard. Calif.

"N"

6

D

Manufacturing Co.

h

Betts

Co.. The Elizabeth

K.

Smith Co. Los Angeles 45,Calif.

ADDRESS

Olean. N.Y.

Mt. Carmel.

Chicago, 111.

Mass.

Yonkers, N.Y.

Jamaica. N.Y.

Pasadena. Calif.

So.

Pasadena, Calif.

Mamaroneck. N.Y.

Pasadena, Calif.

El

Segundo, Calif.

East Aurora. N.Y.

Indianapol~s, Ind.

MANUFACTURERS

Los Angeles. Calif.

New York, N.Y.

Redwood City. Calif.

San Leandro. Calif.

Holliston. Mass.

Versailles, Ky.

R.I.

New York. N.Y.

Washington, D.C.

Van Nuys. Calif,

San Jose. Calif.

Richmond, Calif.

Cdlif.

San Jose

27,

Calif.

Oakland, Calif.

Des

Plaines.

Burbdnk, Calif.

1.

N.J.

31,

Chicago

111.

Ill.

01526-1

0001 5-29

Revised:

20

December

1962

From:

F.S.C.

Handbook Supplements

H4-1

Dated: December

H4-2

Dated:

April

1962

i

-

1/1-2

CATHODE

RAY

TUBE

WARRANTY

I

1

I

The cathode

ray

tubes

date

of sale

not included

Your

local

glad to process your warranty claim for you. Please consult him.

Whenever out

in

rival, since

ray

tube supplied in your Hewlett-Packard Oscilloscope and replacement cathode

purchased from

by

the Hewlett-Packard Company. Broken tubes

in

this

guarantee.

Hewlett-Packard representative maintains a stock of replacement

a

tube

is

returned for a warranty claim, the reverse side

full and returned with the tube. Follow shipping instructions carefullyto insure

no

credit can

1)

Carefully wrap the

padding material.

2)

Wrap

the

3)

Pack in a rigid container which

the

tube in each dimension.

4)

Surround the tube withat

similar shockabsorbing material. tight

all

5)

Tubes

returned from outside the continental United

be packed in

6)

Ship prepaid preferably by We do not recommend parcel post

@

,

are guaranteed

be

allowed on broken

SHIPPING INSTRUCTIONS

tube

in

1/4"

above in heavy kraft

least

around the tube.

a

wooden

box.

AIR

against

tubes.

thick cotton batting

paper.

is

at

four inches ofpackedexcelsior

Be

FREIGHTor

or

electrical failure

or

tubes with burned phosphor are

of

this sheet must be filled

or

other soft

least

4

inches larger

certain that the packing

States

should

RAIL,WAY

air

parcel post shipment.

EXPRESS.

for

one year from the

tubes

and

than

or

is

will

safe

be

ar-

HEW

LETT-PACKARD

CO.

PAGE MILL ROAD, PAL0 ALTO, CALIF. U.S.A.

CRT WARRANTY CLAIM

FROM:

NAME

:

COMPANY:

ADDRESS:

Person NAME

TITLE:

COMPANY:

To process your claim quickly please enter the information indicated below:

1)

2)

3)

4)

5)

6)

7)

8)

to

contact for further information:

:

~~

@INSTRUMENT MODEL

TUBE TYPE SERIAL ORIGINALTUBE REPLACEMENT TUBE YOUR PURCHASE ORDER NO. DATE PURCHASED PURCHASED FROM COMPLAINT (Please describe nature of trouble)

OPERATING CONDITIONS: (Please describe conditions prior

SERIAL

to

and at time of failure

DATE:

I

I I

I

,-

I

SIGNATURE

I

S.A