Heathkit IG-18 User Manual

:IIEAT:IIKIT®

PRICE

$2.00

A.SSElM:BLY"

lM:A.N"t.T.A.L

Copyright Q 1968

Heoth Compony

A/I.,,ff,:.

",,,,,J

SINE-SQUARE

AUDIO

GENERATOR

MODEL

IG·18

595-1179-05

Assembly

and

Operation

of

the

SINE-SQUARE

MODEL

16-18

AUDIO

GENERATOR

BENTON

HEATH

HARBOR,

COMPANY

MICHiGAN

49022

Page

2

TABLE OF CONTENTS

INTRODUC TION. •
UNPACKING

WAVE GENERATOR
Parts

Step-By-Step

Circuit
Circuit

List

••••••••••••

•••••••••

Assembly
Board
Board

Mounting.
Assembly.

• • • • • • • I-••

'"

••••••••••••••

3

4

5

6

7

POWER

Parts

Step-By-Step

SWITCH

SUPPLY

Ltst.

Circuit

PRE

. . . . .

Assembly
Board

WIRING

Parts List. . . . . .

Step-By-Step

Multiplier
Tens
Units
Square
Sine Wave

CHASSIS ASSE MBL Y

Parts

Step-By-Step

TESTS

Tests.

Adjustments.

FINAL ASSEMBLY
OPERATION
APPLICATIONS. • •

IN CASE

List.

Front

Unit
Top
Bottom
120-240
Knob
Test

AND

. . . . . . .

Troubleshooting

Factory

Assembly

SWitch. • • • • • • •

Frequency

Frequency

Wave

. . . . .

And

Assembly.

Chassis

Chassis

Installation.

Lead

ADJUSTMENTS

••••

OF

Amplitude

Amplitude

Assembly

Rear

Wiring.

VAC

Wiring

Assembly

• • • • •

••

DIFFICULTY.

Repair

.........•.......

Mounting And

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

Switch. • • • •

Switch. • • • •

Switch. •

Switch

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

Panel

• • • •

• • •

Wiring.

Alternative.

• • •

••

.......

••••

• •

til

Chart.

Service.

•••••••

Subassemblies.

•••

.

•

• •

Assembly.

••

. ....... .

.

•

..

..

. ....

*'

,.

*'

,.

...

. ...

••

..

11

12

15

'"

•

16
17

18

19

..

37

39

41

45

47

50

57

58
59

SPECIFICA

CIRCUIT DESCRIPTION
Sine

Wave

Square

Power

CIRCUIT BOARD
CHASSIS PHOTOGRAPHS.

REPLACEMENT
SCHE

MA

TIONS. • • •

Generator

Wave

Supply

Generator

•••••••••••••

TIC. • • • • (fold-

••••••••

X-RAY

PARTS

••

VIEWS.

PRICE

out

from

LIST

page).

••

• •

...

60

63

65
65

67

69

71

75

INTRODUCTION

The Heathkit Model IG-18 Sine-Square Audio Generator has
been designed for laboratory use
testing.
kHz. Low distortion (less
available from

.003 volt

make
for gain
harmonic distortion measurements, or

modulator for an

Square wave signals with a rise time of 50 nanoseconds are
available from 5
volts. These clean square wave signals can be used for
checking frequency response in audio equipment, or as a
trigger for testing digital instruments.

Sine wave signals are available between 1

10

Hz

to

100 kHz. The

to

10

volts. These

it

ideal for such applications

and

frequency response,

RF

signal generator.

Hz

to

100 kHz

as

well

as

for service and

than

.1%) sine wave signals are

output

is

stepped from

high

quality sine

as

testing audio amplifiers

as

a signal source for

as

at

output

levels up

Hz

and 100

wave

signals

ap external

to

10

The sine
level
used either simultaneously or independently.

The sine wave
(10
600 ohm loads in ranges up
output
greater.

Other features include: A panel meter for monitoring the sine
wave
switch-selected
circuitry for maximum reliability. All of these features
combine
attractive signal source.
addition

and

square wave frequencies are identical and

of

each is independently adjustable. Both signals may be

output

will operate into high impedance loads

kn

or higher) in all

is

designed

output;

to

repeatable selection of any frequency;

600 ohm internal load;

to

provide you with a versatile, accurate, and

your

laboratory or workbench.

output

ranges, or

to

to

operate into loads of 2000 ohms or

It

will be a valuable and useful

it

will opcrate into

1 volt. The square wave

and

all solid·state

thc

HElATHKIT®

3

UNPACKING

This

kit

is

packed
which
of
have

(Pack
numbered
the
carton

Each
its
At
be
will

package

assembly

contains

loose

parts.

numbers 1 through 3 stamped

#1,

Pack

packages

large

will

carton,

make

assembly

own

Parts

List

the

beginning of

told

which

also

be

directed

#4

that

section.

in a large

smaller

Some of

#2,

Pack

have

the

up

package

section

and

Step-By-Step

each

numbered

to

are

required

packages

remaining

of

the

smaller

#3).

After

been

#4.
the
Parts

package

remove

to

shipping

and a

packages

these

removed

parts

Manual

instructions.

List

to

open. You

the

parts

complete

carton,

number

on

them

three

from

in

the

contains

you will

from

that

To avoid
parts
at

the

Any

wml:.er

tools,

sembly

To order replacement parts,
Price List" and use the Parts Order
kit.

wiring,

procedures.

do

not

directed

the

Parts

in

an

on

it,

it

is

open an;

to do

Sl

Lists
individua
should b

identifiel

th

4

HEATHK

WAVE

GENERATOR

PART

No.

RESISTORS
1/2

Watt

(1)1-54

1-66
1-97
1-98
1-89
1-16
1-20
1-47
1-29

1 Watt

(2)1-56-1

CAPACITORS

(3)20-128

(4)

21-16

(5)25-200

PARTS
Per

Kit

2
2
3
2
2
2
6
1
1

1

1
1
1

PARTS

Open

the following

parentheses

the

from

DESCRIPTION

15 n (brown-green-black)
150 n (brown-green-brown)
1100 n

1600 n
2400 n
4700 n

10

kn

56

kn

220

kn

1200 n

470

pF

.01

fJ.F

.68

fJ. F electrolytic

package

Wave

Page

(brown-brown-red)
(brown-blue-red)
(red-yellow-red)

(yellow-violet-red)

(brown-black-orange)(13)259-1

(green-blue-orange)(14)252-3

(red-red-yellow)

(brown-red-red)

resin
disc

#1 and

Parts

correspond

Generator

5).

LIST

check

List.

Parts

(10)417-154 3 2N2369

(11)250-89
(12)254-1

(15)250-175
(16)254-7
(17)252-51

(18)260-24 1

(19)

each

part

against

The

numbers

to

the

numbers

Pictorial

PART

No.

Diocles-

(9)417

-94

417 -201 2 X29A829

HARDWARE

MISCELLANEOUS

412-66

85-257-2

(fold-out

PARTS DESCRIPTION
Per

Kit

Transistors

3 2N3416

8

7

1

8

1
2

1

1
1 Wave

in

on

(cont'd.l

6-32
#6
#6
6-32
2-56 x 3/81!
#3
2-56

Lamp

Lamp
Solder

X 3/81!

lockwasher
solder

nut

lockwasher

nut

transistor

transistor

transistor

screw

lug

screw

clip

generator

circuit

board

CONTROLS

(6)10-155

10-201

DIODES-TRANSISTORS

(7)

56-26

(8)

56-56
57-65

HEATHKIT®

2
2

2

1 Silicon diode

2 Silicon diode

750 n

10

kn

Crystal

diode

PARTS FROM -PACKAGE

(20)200-516

597-308

597-260
391-34
490-5

1
1
1
1

1

1

#4

Chassis
Kit

Builders

Parts
Identification
Nut

Manual (See
part

Order

starter

number.)

Guide

Form

label

front

cover

for

5

page

5b

WAVE

GENERATOR

®

®

PARTS

PICTORIAL

®

@

® ®

@ ®

®

Page

6

CIRCUIT

( )

NOTE: A
kit.
and
Kit

( )

NOTE: Due
circuit
four
of

each

board
Proceed

BOARD MOUNTING

Position
shown in

plastic

Use

this

2-56

nuts

Builders
Refer

generator

Use

eight

lockwashers,

6-32

nuts.

lug.

board

Pictorials.

Pictorial

to

be

to

the

chassiS

Pictorial

nut

nut

starter

on

screws.

Guide

to

Detail

circuit
6-32 x

one #6

Note

to

its

is

shown

A

shows

assembled.

the

Circuit

STEP-BY·STEP

in

front

1.

starter

Refer

for

further

1A

board

3/8"

the

position

size,
small

the

Board

is

to

hold

and

screws,

solder

only

in

each

drawing

area

Assembly

of you

supplied

and

to

fasten

to

lug, and

one-hali

as

with

start

Page

3 of

information.

the

the

chassis.

seven

of

the

solder

of

of

the

at

the

of

the

circuit

section.

it

is

this

6-32

the

wave

#6

eight

the

next

top

ASSEMBLY

#6

Detail 1 A

0

\~

e

CJ09~

G

~

+

:CJ:

+

iI:B

0$8]

o +

POWER

SUPPLY+

CIRCUiT

BOARD

QD

0

e

6

6

~

I I

DO

0(:>-

80-=-

e

P-E}

.~~OlCt?S~O

",

00

1

1

Q'o

$0

u

e

WAVE

CIRCUIT

aqooo~

GENERATOR

BOARD

OO~

(0

P-

@

I

~

e

0

e

y)

~

PICTORIAL 1

~

Page

7

CIRCUIT

BOARD ASSEMBLY

START

..

FOR

GOOD

CONNECTIONS,
KEEP

IRON

TiP

WIPE
DAMP

SPONGE

1600 n
1200 n
150 n

..

) 10

10

Prepare this combination before in­stalling
(brown-black-orange) silicon diode

(#56-56).

SOLDERED
YOU

THE

IT

CLEAN.,.

OFTEN

Kn
Kn

MUST

SOLDERING

WITH

OR

CLOTH.

(brown-blue-red),

(brown-red-red)

(brown-green-brown),

(brown­(brown-black-orange).

it

on

the

A

black-orange),

circuit board: 10 K

~_'

..-/,

~

~~~,

~

IDENTIFICA

The

steps

area

on

of

this

!

;;

/ I

j

1

watt.I--+~~~"'"

TION DRAWING

this

Page

the

circuit

board

CONTINUE

Q

•

and
lengths,

NOTE:
clip,

bend

the

screw

in

the
breakage
sion.

Mount
hardware,

(brown-

(red-

cut

Before

its

head

clip,

from

the

W 2-56 x 3/8"

yellow-

mounting

sides

to

pass

and

too

lamp

blue-

out

to

prevent

much

clip

red).

red),

by

the

spring

with

SCREW

lead

lamp

permit

ridges

lamp

ten-

the

#2

CD

t;/

~;(/

l'»,f{:)

?~

WRAP

DIODE LEADS-

J~

I J

()

~

CD

)fg

( ) Install this combination

banded end
markings

on

( )

Solder
and
lengths,

all

cut

/

SOLDER

of

the

diode matches the

the circuit board.

the

leads

off

the

~

CUT

DIODE

so

to

excess

EXCESS

LEADS

that

the

lead

the

foil

PICTORIAL

2

/iPl~~i;i:~;

,'::~.:.::',':.:@J.:#

3 L 0 C K

ell

WAS

P

HER

:·.~?\\::::~~}:·~~8~~~~::)~··;:~·:

~#3

LOCKWASHER

®

2-56

NUT

( )

Slide

the

lamp

into

the

lamp

the

3,

clip

leads

each

the

in-

circuit

foil

lead

from

NOTE:
are
other,

( )

( )

Make

not

Insert

dicated

board,

Solder
and

lengths.

PROCEED

one

end

certain

crossed

the

leads

holes

both

cut

off

TO

of

the

clip.

the

or

touching

through

on

the

leads

to

the

excess

PICTORIAL

SWITCH

PREWIRING

PARTS

PICTORIAL

'-

_:

OR

CD

-.,.

..,I

J-

r

'-

~

=CI

~.

OR~

~

GR~

~,

,.

BLK

BRN

(2)

Page

8

( )

MAY

START

..,.

15 Q

(brown-green-black),

15

Q'

(brown-green-black).

10 kQ

(brown-black-orange).

10 kQ

(brown­4700 Q
56 kQ

,68
NOTE:
lead

SIGN

(yellow-violet-red),

(green-blue-orange),

IJ-F

electrolytic

Position

as

shown.

BE

MARKED WITH

(+)

OR

black-orange).

capacitor.

the

positive

POSITIVE

COLOR

DOT

(+)

IDENTIFICATION

PART

NUMBER

The

steps

on
done
cuit

in

board,

this

this

area

DRAWING

page

are

of

the

cir-

CONTINUE

NOTE: When
cathode
shown
cathode
a
or a symbol.

CO

color

LO

R

end

on

end
end,

the

~

COLOR

001

)!fr

)

Silicon

Silicon

150 Q

(brown-green-brownl.

10 kQ

(brown-black-orange),

220 kQ

1100 Q

1100 Q

1100 Q

Solder

and

cut

lengths.

o

installing

must

circuit

is

marked

color

diode
diode

(red-red-yellow).

(brown-brawn-red),

(brown-brown-red).

(brown-brown-red).
all

the

off

be

positioned

board,

dot.

SYM

(CATHO

END~

~

COLO

BAND

~

(#57-65)
(#57-65)

leads

the

excess

diodes,

to

the

as

The

either

band

( )

Solder
foil
lead

all

and

cut

lengths,

the

off

leads

the

to

the

excess

PICTORIAL

3

PROCEED

TO

PICTORIAL

START

Page

9

(

),01

fl F

chassis
capacitor
edge

of

#6

solder

each

lead

cess

leads,

NOTE: When
sure

to
shown.
end.

position

The

;jY

CATHODE

( ) IN191

white-brown)
position

•

disc

capacitor.

over

lead

the

circuit
lug
to

its

installing

cathode

COLOR

END

crystal

of

the

and

closest

(S-I).

foil,

the

cathode

end

diode

at

banded

Turn

connect

to

board

to

Also,

solder

Cut

off

diodes,

end

is

the

banded

(brown-

D3. Note

end.

the
the

the

the

ex-

the

be
as

IDENTIFICA TION DRAWING

The

steps

on

this

this

area

of

the

page

circuit

board,

are

done

in

CONTINUE

NOTE:
low
collector
(E)
transistors,
the
press
tor
board,
transistor

( )

Refer

to

determine

(C),

leads

of

holes

in

down

is

about

Bend

Transistor
at

(:;8,

Transistor
at

Q7.

Transistor

at

Q6,

Q

to

the

HhlstJration

the

lo{:ation

base

(B),

the

2N2369 (#417-154)

Align

the

the

circuit

gently

until

1/4"

from

the

in

leads

place.

2N2369 (#417-154)

2N2369 (#417-154)

2N2369 (#417-154)

leads

board,

the

transis-

the

to hold

circuit

the

( ) IN191

white-brown)

position

Solder

cut

off

crystal

of

the

all

leads

the

excess

diode

at

D4. Note

banded

to

lead

end.

the

(brown-

the

foil

and

len

hs.

PICTORIAL

4

( )

Solder

to

the

lead

lengths,

NOTE:
the
the
dered,

( ) 10 krt

PROCEED

It

control
control

10 krt
Solder

the

foil.

all

the

foil

and

may

be
lugs
in

place

control

control

all

TO

PICTORIAL

transistor

remove

necessary

out

slightly

until

(#10-201).

(#10-201).

the

control

the

it

leads

excess

to

bend

to

hold

is

sol-

lugs

5.

to

POWER

SUPPLY

PART

No.

RESISTORS-CAPACITORS

(1)1-1

1-89

(2)25-126

DIOOES-TRANSISTOR

(3)

56-66
(4)57-65
(5)417-178

HARDWARE

PARTS DESCRIPTION
Per

Kit

1
1

1

1

2

1

47 n

(ye How -

2400 n

(red-yellow-red)
50

VR
Silicon

40389

Open

the

entheses
er

1/2

/-LF

capacitor

43

zener

diode

transistor

package

following

Supply

watt

violet-

1/2

PARTS

correspond

Parts

resistor

black)

watt

diode

#2

and

Parts

Pictorial.

resistor

LIST

check

List.

The

to

the

numbers

70

each

part

numbers

on

PARTS

....

1.....

.

against
in

par-

the

Pow-

PICTORIAL

CD

8r~r.Ui""1

(6)250-89
(7)254-1 8
(8)252-3

MISCELLANEOUS

54-205

85-256-2
344-50
344-52

HEATHKIT

4

6-32 x 3/8"

lockwasher

#6

6-32

Power

Power
Black
Red

wire

nut

8

1
1
1
1

®

screw

transformer

supply

wire

circuit

board

CD

~J'

©

CD

@

11

Page

12

CIRCUIT

( )

Refer

four

ers,

6B.

BOARD

Detail

Detail

circuit

x

four

STEP-BY-STEP

MOUNTING

6A

6A

board

3/8"

screws,

6-32

nuts

AND ASSEMBL Y

and

fasten

to

the

chaSSis. Use

four

#61ockwash-

as

shown

the

in

Detail

power

Detail

ASSEMBLY

6B

CONTINUE

NOTE: When
cathode
shown

thode

color
a

COLOR

on
end
end,

symbol.

end

the

is

color

~

o

installing

must

be

circuit

marked

dot,

(CATHODE

diodes,

positioned

board.

The

with

either

color

band,

SYMBOL

~

the

as

ca-

a

or

Perform

47

r;z

) 2400
)

Install

178

and

either
Line
rect
sistor

)

Solder

and

lengths.

steps

on

Pictorial

START

..

(yellow-violet-black).

(red-Yellow-red).

40389

transistor(#417-

QI0.

The

emitter

side

each

and

ID:tE~

SPAC~

C\~E

all

cut

off

(E)

of

the

lead

position

the

c B

the

the

collector

leads
with

circuit

leads

wide

the

the

to

excess

are

space,

cor-

tran-

board,

the

lead

(C)

on

foil

6.

..

.......

:-:.:

;.;.

....... .

PICTORIAL 6

001

~

Silicon
Silicon

Zener

at

50

)

NOTE:

on

the

(+)

mark

( )

Solder

and

lengths.

This

completes

the

power

cept

for

citors

Proceed

power

diode
diode

diode

D7.

/IF

tubular

Match

the

capacitor

on

the

circuit

all

the

cut

off

the

supply

the

three

which

will

FI N ISH

with

transformer.

the

COLOR

BAND

~

(#57-65)
(#57-65)

VR 43 (#56-66)

capacitor.
positive
with

leads

the

construction

circuit

300
be

mounted

mounting

the

board.

to

excess

board

/IF

60 V

at

at

(+)

mark

positive

the

lead

capa­later.

of

D5,
D6.

foil

of

ex-

the

Page

13

Refer

to
( ) Mount

Connect

power

( )
( )
( ) The

NOTE: When

easier

ahead
wires

be

ends

( )

to

Pictorial

Detail

7 A

the

side

of

ers,

and

the

supply

One

red

Red-yellow

other

to

of

time,

are

used.

Prepare
wire:

of

Remove

each

prepare
listed

7 (fold-out

for

the

following

power

the

four

power

circuit

transformer

chassis

6-32

transformer
board

to U (8-1).

to

V (8-1).

red

to X (S-l).

wiring

the

as

in

in

the

1/4"

wire.

the

following

with

nuts.

this

lengths
the
order

of

from
steps.

to

four

#6

leads

as

follows:

kit,

you

of hookup

following

in which

insulation

lengths

Page

17) and

the

under-

lockwash-

to

may

find

step.

they

from

of hookup

the

it

wire

The

will

the

Detail

7A

OP

OF

CHASS I 5

6"

red

5-1/2"

Twist
twisted

( ) At

( ) At

The
Recheck

prewiring.

the

black

NEG
(S-1)

the

the

1"
3"

the
wave

chassis

black

these

Wire, connect

(S-l)

in

other

generator

your

two

pair

as

end of

black
red

this

and

the

power

end of

wire

wire

subassembly

work;

shown

the

circuit

wires

to hole A POS (S-1) in

thEm

together

in

Detail

twisted

the

black

"red

wire

supply

this

twisted

to

hole C NEG (S-1) and

board.

is

proceed

1"

I

pair

wire

to

circuit

pair,

now

to

to

form

7B.

with

to

hole

connect

complete.

the

2"

I

the

hole Y
Z POS
board.

switch

a

2"

the

~

2"

BlK

~3/4"

RED

3"

I

4"

I

Detail

78

3"

RE

5"

I

D

I

1"-

r-sLK"1

I

6"

I

Page

14

SWITCH

PREWIRING

PART

No.

PARTS
Per

RESISTORS

(1)1-83 1

1-84
1-66
1-94
1-63
1-131

1-96
1-97
1-98
1-89

1/2

Wcrtt.

1 %

(2)2-249

2-248
2-247
2-50
2-97
2-98
2-99
2-11

CAPACITORS

1
1
1
2
1

1

5
5

1

2
2
2
2
2
2
2
2

1

1

Kit

Open
the
theses
Pictorial

DESCRIPTION

n

(green-blue-black)

56
62

n

(blue-red-black)
150 n
390 n
510 n
620 n
750 n

1100
1600 n

2400 n

2500 n (2.5
3300 n (3.3
5000 n

10 kO

25

33.3
50
100

.005

(blue-red-brown)
n

kn

kn

kn

kn

500

pF

p.F

package

following

(brown-green-brown)

(orange-white-brown)

(green-brown-brown)

(violet-green-brown)

(brown­(brown-bIue-red)
(red-yellow-red)

kn)
kn)

(5

kn)

PARTS

#3 and

Parts

correspond

(fold-out

brown-

LIST

check

List.

The

to

the

numbers

from

Page

PART

No.

Capacitors

27-83

(5)27-82 1

27-81

SWITCHES-CONTROL

(6)63-485

red)

(7)63-486
(8)63-487

(9)63-488

(10)252-7 1

WIRE

344-50
344-51
344-53
344-54
344-55
344-56
344-59

each

part

against

numbers

6).

inparen-

on

the

Parts

PARTS DESCRIPTION
Per

Kit

(cont'

d.

1
1

1

1

2

1

1
1
1
1
1
1
1

8-position
control
3-position
control
11-position
4-position
Control

Black
Brown
Orange
Yellow

Green

Blue

White

NUT

wire

wire

wire

wire

wire

nut

wire

wire

rotary
rotary

rotary

rotary

with 5000

with 400

[I

[I

HEATHXJ:T®

15

Page

16

All of
lug

switches

but

the

locations,

not

each

location
numbering
knob end of
designated
for

example,

For

your

wiring

be

temporarily

it

is

prewired.

MUL

TlPLIER

Refer

( )

to

Pictorial 8 for

Refer

to
rotary
Use a control
finger

STEP-BY-STEP

rotary

runs

the

"FIT

is

Detail

switch

tight.

switch

numbered 1 through

all

twelve

will

still
clockwise
switch.

for

lug

mounted

The

front

and

number 2 onthefront

to

SWITCH

8A and mount

(#63-488)

nut.

Turn

wafers

locations

be

numbered.

as

viewed

switch

"R"

for

each

the

chassis

the

following

the

in

chassis

the

nut

have

twelve

12. In
are

from

wafers

rear.

switch

4-position

hole

down only

some

are

will

while

steps.

L.

ASSEMBLY

MULTIPLIER

(63-466)

r!i'b

1

-l/

2"

WHT

PICTORIAL 8

SWITCH

9"

ORG

Connect
plier

NOTE:
may

switch

Either

be

wafer.
( )

Connect a .5

(8-1) to

( )

Connect
to

lug

Detail

the

components

as

directed

end of

connected

lug

R2

a 5

f.LF

Rl

(8-1).

SA

and

in

the

following five

to

either

f.LF

capaCitor

(8-1).

capacitor

wires

the

following

the

from

to

the

capacitors

front

from

lug

Multi-

steps.

or

lug

F1

rear

F2

(8-1)

)

Connect a .05

to

lug

R3 (8-1).

Connect
(8-1)

to

Connect a 500pF

to lug R5
Prepare

1-1/2"

9"

orange

( )

Connect

to

lug

nected

Connect

Fll

lug

nected

This

completes
switch.
inspect
should
will
is

be

be

called

Remove
your

soldered

used

for

a .005

lug

(S-l).

thE~

white

one
F7
later.

one
(8-1);

later.

work.

later.

later.

f.LF

calt:l<lC~1tc,r

f.LF

Call1a(~it()r

from

lug

from

R4 (8-1).

calpac~itc,r

fClllc}wing

end

of

the

end

of

the

other

the

prewiring

the

switch

All

of

except

Set

the

from

lug

lelogths of hookup wire

the

other

the

from

the

lugs

switch

1-1/2"

9"

end

lugs

end

orange

of

the

the

on both

R7

and

white wirl

will

will

chassis

aside

F3

(8-1

lug

F,

F5

(8-1

be

con·

wire

be

con

Multiplie

an

wafer

Rll

whic

until

t

'

Page

17

TENS FREQUENCY SWITCH

Refer
from

( )

NOTE: Use

Center

soldering.
( )

( )

NOTE:
and

the

it

tions

connection.

to

this

Fasten

487) in
turned
on

the

the

switch.

each

Pass
through
beside
the

end to

lead

to

nut.
Connect

F5

(8-1).

Where a wire

then

goes

connection

will

count

(8-2),

the
page)

an

chassis

down

rear

1%

resistor

one

lug

lugs

touch

the

as

one

top view

for

ll-position

wafer

resistors

lead

R5 (N8). Bend
R6

lug

other

to

another

and

two

of

Pictorial 9 (fold-out

the

following

hole

L.

finger

the

entering

tight.

for

proper

in

between

of a 3300 n (3.3 kQ)

(N8)

and

R7 (N8);

R8

(N8).

switch

lead

of

passes

point

comes

wires

in

steps.

rotary

the

through a connection

in

the

and

Use a

Refer

positioning

following

the

wafers

the

lead

Do

spacer

this

resistor

(or

passes

contact

solder

one

switch

then

not allow

(#63-

control

to

the

steps.

before

resistor

so

it

connect

post

or

to

beside
with it),
instruc-

leaving

nut

lugs

of

lies

the

the

lug

the

( )

Connect
Rll

Connect
lug F12 (8-3)

Connect

(8-3)

( )

Connect
lug
lugs

( )

Prepare

wire:

2"
5"
3-1/2"

3"

2-1/2"

Connect

(8-3)

the

(S-1).

a 2500 n (2.5

a 10

to

lug

a 5000 Q

F2

(N8)

at

R2.

the

brown
brown

yellow

yellow

yellow

the

and

R5 (N8).

other

lead

to

lug R12 (8-1).

kn

resistor

R1 (8-1).

to

lug

2"

brown

of

this

kQ)

(5

kQ)

R2 (8-1).

lengths

between

resistor

resistor

from

resistor

80lder

of hookup

to

from

lug

from

lugs

lug

Fl

both

F2

( ) Connect one

rE;ls~stor

through
by R6 (8-3).

Connect

(8-1)

( )

Connect

F8

both

Refer

following

( )

to

Pass
through
beside
nect
Fll

to

lug R6 and

to

lug

a 5000 Q

(8-1)

lugs

the
steps.

one

lug

lugs

the

(8-2).

a 10

to

at

bottom

lead

end

lead

of a 2500 Q (2.5 kQ)

lug

F6

(8-1).

Insert

around

kn

resistor

R7

(8-3).

(5

lug R8 (N8). Be

F8.

view of

of a 3300 Q (3.3 kQ)

Fll

(N8). Bend

F12

(N8)

to lug

F2

the

kQ)

resistor

Pictorial 9 for

and

Fl

(N8).

1"

I

the

Now

the

wire

from

sure

lead

(NS);

other

passing

lug

from

to

solder

resistor

so

it

then

solder

2"

I

lead

F7

lug

the

lies

con-

lug

( )

Connect

lug R5 (8-4),
will

be

NOTE: In
wires

( )

This

quency
the
them

a

wire
and
chassis

the

as

shown

Connect

and

the
Solder
these

completes

switch.

lugs

at

and lug R8 which

attached

soldered

and

one

end

The

connected

next

in

one ,

3"

both

wires

F4

later.

set

will

the

All

to

it

aside

POSitiOIl

Pictorial

wires

be

connected

prewiring

should

have nothing

has

a 5000 n

it.

These

Remove the

until

it

lugs

4"

!

5"

brown

end of

tl1te

9.

to lug RIO (8- 3).

The

of

the

be

soldered

will

switch

is

called

wire

this

three

yellow

the

2-1/2",

free

ends of

later.

Tens

except
connected
resistor

be

wired

from

for

5"

l

to

wire

Fre-

to

and

to

the

later.

6"

I

PICTORIAL

7

TENS

TOPVIEW

FREQUENCY

(63-487)

SWITCH

BOTTOM

PICTORIAL

VIEW

3"

9

Page

18

UNITS FREQUENCY SWITCH

Refer

lowing

( )

NOTE: Use
Center
before

( )'

to

the

top view of

steps.

Fasten

487)

turned

on

this

in

the

rear

switch.

each

an

chassis

down

1%

resistors

resistor

soldering.

Pass

one

lead

lug

R5

(NS). Bend

lugs

R6

(NS)

end

to

lug

R8

Connect
lug

F5

the

(S-l),

Connect a 25

Pictorial10for

ll-position

hole

finger

wafer

for

between

of a 33.3 kQ

the

and

R7

(NS).

other

kQ

lead

resistor

L.

tight.

proper

in

lead

(NS);

to lug R6 (S-3).
Connect

to

Connect a 50

to

Refer

to

following

( )

Pass

lug

side

a 100

lug R7 (8-3).

kQ

lug

R8

(N8).

the

bottom

steps.

one

lead

Fll

(NS). Bend

lugs

F12

kQ

resistor

resistor

Solder

view of

of a 33.3

the

(NS)

and F1

the end to lug F2 (NS). Now

(S-2).

Connect

Rll
Connect

the

(8-1).

a 25 kQ

other

lead

resistor

to lug R12 (8-1).

rotary

switch

Use a control

Refer

to

positioning

the

following

the

switch

resistor

so

it

lies

then

connect

of

this

resistor

from

lug

from

lug

from

lug

both

lugs

Pictorial

kQ

resistor

lead

(NS);

so

then

10

it

solder

of

this

resistor

from

lug F12 (S-3)

the

fol-

(#63-

nut

the

lugs

steps.

wafers

through

beside

the

F6

(S-l)

F7

(8-1)

F8

(8-1)

at

F8,

for

the

through

lies

be­connect
lug

Fll

to

lug

UNITS

TOP

VIEW

of

3-1/2"

BRN

to

( )

Prepare

2"

1-1/2"
3-1/2"
4"
4-1/2"

the

brown

brown
brown

white

white

5" white

Connect

a 2"

(S-3) and

( ) Connect one end of a

to

lug

R5 (S-4).

connected

( )

Connect
to

of
wire,

one end of a

lug R8 (S-3), Remove a

insulation

which will

( ) Connect one end of

the

5" white

(S-3).

will

Solder

be

connected

FREQUENCY

following

brown

R5

(NS).

later.

from

both

(63-487)

The

be

connected

wires

lugs

later.

let1LgtllS

the

free

the

4",

to

both

at

F4.

SWITCH

BOTTOM V lEW

()f

h'oolrup

brown

total

end of

later.

the

4-1/2"

lugs

The

of

free

wire:

wire
3/4"

this

and

at

ends

F2

F4

Connect

)

(S-3)

)

Connect a 50

to

to

a 100

lug

lug

R1

R2

kQ

(S-l),

kQ

(S-l),

resistor

resistor

Solder

from

from

both

lugs

lug

Fl

lug F2

at

R2.

This

completes
quency switch. All
except

the

two

the

prewiring

lugs

lugs

at
no connection. Rem ove
chassis

and

set

it

aside

later,

of

the

should

RIO, which

the

switch

until

it

Units

be

soldered

should

from

is

called

Fre­have

the

for

Page

19

SQUARE WAVE AMPLITUDE SWITCH

Refer

to

Pictorial 11 for the following steps.

( ) Fasten

chassis hole L. Use a control
tight.

NOTE: When you install resistors on the Square
Amplitude switch, position each resistor
Pictorial.

( ) Connect a

lug 6

(

->

Connect a 510
lug 5

( ) Connect a 62 Q (blue-red-black) resistor from

(S-3)

( ) Connect a 56

(S-2)

( ) Prepare

the

3-position

510

n.

(NS)

to

lug 5 (NS).

n.

(NS)

to

lug 4 (NS).

to

control lug 1 (NS).

n.

(green-blue-black) resistor from

to

lug 2 (NS).

the

following lengths

rotary

(green-brown-brown) resistor from

(green-brown-brown) resistor

switch

nut

turned down finger

as

of

hookup wire:

(#63486)

shown

Wave

in

in

the

SQUARE

-

WAVE

AMPLITUDE

(63-486)

PICTORIAL

SWITCH

BLK

11

2"

green

2"

black
3-1/2" green
2-1/2" black
4-1/2" black

( ) Connect a

2 (S-l).

( ) Connect a

1 (S-2).

NOTE: Only
switch
connected later.

in

one

each

2"

green wire from 6

2"

black wire

end

of

a wire

of

the

next

three

1"

I

Connect a 3-1/2" green wire

Connect a 2-1/2" black wire

Connect a 4-1/2" black wire

2

completes the prewiring
switch. All switch lugs and control lugs 1 and 2 should have
soldered connections. Control lug 3 should have no

the

called for later.

4"

I

2"

I

connections. Remove
aside until

it

is

3"

I

to

lug 3 (S-l).

to

lug 2 (NS).

to

lug 2

of

the

Square

switch from

(S4).

Wave

the

chassis and set

5"

I

Amplitude

6"

,

it

Page

20

SINE WAVE

Refer

to

Pictorial

steps,

( )

Fasten

in

485)
turned

NOTE:
have
and
be
shown
body
cular,
touch

many

quite

sure

in

or

the

The

close

to

the

leads

make

moving

Connect

sistor

Connect

sistor

Connect
from

lug

Connect

from

lug

AMPLITUDE

12

view A for

the

8-position

chassis

down

hole

finger

tight,

Sine Wave

resistors

to

position

Pictorial.

to

sure

the

touch

that

on

switch

each

Do

parts

an

1100 g

from

a 750 g

from

a 1600 g

lug

lug

(brown-brown-red)

F8
(violet-green-brown)

F5

(brown-blue-red)

F7 (S-2) to lug

a 1600 g (brown-

F8

(S-3) to

SWITCH

rotary

L.

Use a control

Amplitude

it

that

itself.

resistor

not allow

other

or

the

(NS)

(NS)

parts.

resistors

posts

to

to

F8

(NS).

blue-red)

lug

F9

(NS),

the

following

switch

switch

pass

through

Therefore,

as

the

resistor

In

of

the

switch.

lug

F5

lug

F7

resistor

resistor

(#63-

nut

will

it

is

parti-

do not

re-

(NS),

re-

(NS).

Connect

( )

from

lug

( )

Connect

sistor

from

Connect
from

lug

Connect

sistor

from

Connect

resistor

of

the

lead.

3/4"

from

will

be

connected

( ) Prepare the

1-1/2" blue

5"

blue

3"

blue

2-1/2" blue

1-1/4"

( )

Connect a 1-1/2"

FlO

a 1600 n

Rll

(S-3)

a 390 n

lug

a 2400 n

Rl

(S-2)

a 150 n

lug

R2

one

lead

to

lug

R2 (S-3), Use

Cut

the

fol!oVicine:

and

R9

(brown-blue-red)

to

lug R12 (NS).

(orange-white-brown)

R12 (S-3)

to

lug

(red-yellow-red)

to

lug

R2

(NS).

(brown-green-brown)

(NS)

to

of a 620 n

off

the

resistor

control

(blue-red-brown)

other

body.

lug 2 (S-l).

the

full

lead

at a point

This

later.

lengths of hookup

blue

wire

mre:

between

(S-l).

resistor

re-

Rl

(NS).

resistor

re-

length

lead

lugs

Connect
from

Pass

( )

red)
lug 1 (S-l),

( )

Connect

lug

Refer
steps,

Connect
sistor

Prepare
resistors
leads

Connect

resistors

At
resistor
sistor

( )

Connect
from

lug

one

resistor

RIO (NS).

to

Pictorial

from

at

the

other

to

lug

a 1600 n

F9

lead

(brown-blue-red)

(NS)

to

of

an

through

Use

the

the

other

12 View B

an

1100 n

lug

F9

two 1100 n

by

attaching

one end

the

to

to
lug

a 1600 g

as

common

lug

R3 (NS).

end

of

lug R12

Rll

(NS).
(brown-blue-red)

RIO (S-3)

resistor

lug

RIO (NS).

1100 n

lug

full

lead

(brown-brown-

R5

(NS)

length

of

this

for

of

resistor

the

to

the

following

(brown-brown-red)

(S-3)

to

lug

F3

(brown-brown-red)

and

soldering

shown

this

(NS)

lead

pair,

and

in

of

this

the

Detail

connect

other

resistor

to

lug

Rll

(NS).

control

lead.

to

re-

(NS).

the

12A.

pair

of

one

re-

NOTE:
only
free

( )
( )

( ) Connect a 1-1/4" black

( ) Prepare a

This
tude
on
switch
it

one

ends

)

Connect

Each

end

will

of
be

a 5"

Connect a 3"
Connect a 2-1/2"

3

O.

R3 (NS).

4-1/2" black

of

insulation from one
the other end.
(S-4) and R5
mre

does not touch

completes
switch.

the

control

from

is

called

All
the

for

Pass the

(S-4)

prewiring

should

later.

the

next

connected

connected

blue

blue

to

the

lugs

on

chassis

five

to

later.

wire

wire

blue

wire

Vicire

Viire

2"

R3 (S-3).

shield plate.

the

Sine

both

switch

be

soldered.
and

wires

the

to

to

will

switch.

lug

F4

F6

have

(S-l),

control

F3 (S-2)

by removing

2"

of

insulation from

end through lugs F5

~Iake

Wave

sure

to

that

.o..J"I-'LJ.-

wafers

Remove

set

it

aside

The

lug

lug

1/4"

the

SINE

5" B LU

WAVE

AMPLITUDE

{63-485}

Page 21

SWITCH

VIEW

3" B

A

4-l/2"

LU

BLK

VIEW

B

1"

I

2-1/2"

PICTORIAL

2"

I

BLU

12

3"

I

SOSJ

4"

I

m

Detail

5"

I

12A

6"

I

21

Page

22

CHASSIS

ASSEMBLY

PART

No.

RESISTORS

1-95
1-23
1-102

CAPACITORS

Electrolytic

25-193
25-205

Mylar*

CONTROL·SWITCHES

PARTS
Per

1
1
2

2
3

110 1

1

Kit

2

PLASTIC PARTS

5

70-6

"OIJPn!'lt

mBLinll

,

1

1

9

1

RegllDrled Trademark

re

lief

outside

Check

remaining
The
numbers
torial

DESCRIPTION

n

560

27

82

250

300

1
Rocker

Black
Red
Binding

is

U.

(green-blue-brown)

kn

(red-violet-orange)

kn

(gray-red-orange)

J..LF
J..LF

.047

J..LF

Mn

dual

switch

test

test

lead

post

Line

cord

strain

round

cord**

supplied

S.,

where 2-or

to be

package

numbers

on

(fold-out

control

lead

insulator

insulator

base

used

3-lead

PARTS

#4, which

parts,

relief,

against

in

parentheses

the

Chassis

from

insulator

in

areas
round

LIST

consists

the following

correspond

Assembly

Page

25).

PART

No.

Plastic Parts (cont'd.)

(8)75-71
(9)100-16-2

100-16-18
100-699

(10)

207-3
(11)261-28 4
(12)413-10 1

261-30

(13)

HARDWARE

#6

(14)250-227

(15)250-26 4
(16)250-304

(17)250-89 10
(18)250-229

(19)250-303
(20)

250-365

(21)

254-1

(22)

254-27

(23)

255-15

(24)259-1
(25)252-3

PARTS DESCRIPTION
Per

Hardware

of

Parts
Parts

Kit

1

2
2
1
1

2

4

4

8
4
4

11

1

4

6

15

all

the

List.

to

the

Pic-

Line

cord
Binding
Binding
Binding

Cable

Plastic
Red
Line

6-32 x 7/8"
screw
6-32 x 5/8"

6-32 x 7/16"

6-32 x

6-32 x 1/4"

screw

6-32 x 1/4"

screw
#6 x
#6

lockwasher
#6
washer
#6 x
#6

solder

6-32

cord

strain

post
post

post

clamp

foot

pilot

lamp

cord

retainer

3/8"

1/4"

sheet

external-internal

1/2"

spacer

lug

nut

relief,

cap,

black

cap,

red

cap,

green

lens

phillips

screw

spacer

screw

phillips

decorative

metal

flat

head

stud
head
head

screw

lock-

23

Page

24

PART

No.

Other

PARTS

Per

Kit

Hardware

(26)252-7 5
(27)253-10 6
(28)254-4 6
(29)252-32 1
(30)427-3 5

METAL PARTS-HANDLE

(31)90-401-2 2

100-769 1

100-770

(32)

100-771

(33)204-759-1

1

2

4
(34)210-35 1
(35)211-32 2

WIRE

Hookup

344-50
344-51 1
344-54
344-55
344-57
344-58

Wire

1
1

1
1
1

DESCRIPTION

Control
Control
Control
Speednut
Binding

Cabinet

Front
Rear
Side

End

Bezel

Handle

Yellow
Green
Violet
Gray

nut

flat

lockwasher
post

half

panel

panel

rail

cap

washer

base

shell

PART

No.

Other

Wire

89-23
341-1 1
341-2

MISCELLANEOUS

{42)253-85

(43}260-16

407-131
(44)412-15
(45)431-41
(46)431-35
(47)432-27

{48}438-13

(49)259-20
(50)421-22

PARTS DESCRIPTION
Per

Kit

1
1

Line
Black
Red

cord

test

test

lead

lead

BUSHINGS

knob

bushing

shaft

knob

shaft

knob

knob

shaft

knob

2

2

2

1

1
1
1

1

2

4

1

shaft

Felt

washer

Alligator

Meter

Neon

lamp

2-lug

terminal

7

-lug

terminal

Line

cord

Banana

Solder

Fuse,

pin

3/4

knob

adapter

plug

ampere

bushing

bushing

strip

strip

slow

blow

FRONT

Refer

( )

NOTE: When you
in
each
sition.

AND

to

Pictorial

Place a soft
to

protect
scratched
tion

the

front

Mount
Detail

the
pressed

the

the

13A.

front

down

following

binding

REAR

in

pilot

of

post

STEP-BY-STEP

PANEL SUBASSEMBLIES

13

for

the

following

cloth

on

your

work

the

the

panel

The

the
tightly.

install

steps,

base

front

following

lamp
lens

panel

steps.

as

shown.

lens

at A as

should

panel

be

and

the

binding

sure

the

is

in a horizontal

from

be

tight

thespeednut

hole

surface

Then

shown

post

through

steps.

being
posi-

in

against

bases

po-

ASSEMBLY

Detail

13A

@

@
@

Page

25

( )

Refer
post
insulators,

insulators
hole.

to

base

and two

Position

Pictorial

#6 LOCKWASHER

PICTORIAL

Detail

at

6-

32

13B

J.

Use two binding

a #6

lockwasher,

nuts.

Be

are

seated

the

solder

and

sure

within

install

a #6

the

binding

the

lug

as

a binding
post

base

solder

lug,

post
mounting
shown

13.

~b~~1~2p

BINDING

POST

11\

~

BASE

~

J

BINDING.

POST

BASE

INS u

L.~~OR

..

BIND I

POST

INSULATOR

6-32

#6

SOLDER

6-32

Jsir:R~y£~

~t:.::>

BASE

~

~

~

NUT

@

LUG~

NUT

~-

r F

Detail

138

in

13

( )

Install

K and

( )

Install

R.

NOTE:
tended
binding

( )

Refer

phillips

large

BINDING

BINDING

BINDING
BASE

black

p.

the

The

following

to

prevent

post

to

the

POST

POST

POST

INSULATOR

binding

green

binding

step

the

caps.

Detail

13D and

screwdriver

open

end

CAP

BASE

~

post

post

is

optional, and

removal

tap

with a

of

each

caps

cap

and

the

hammer

binding

at

locations

at

location

loss

handle

is

of

of a

to

en-

post.

in­the

In a

like

locations

Refer
binding
base,

to

post

one

lockwasher

Install

and

red

N.

manner,

K,

N,

and

Detail

at

location

insulator,

and a 6-32

binding

13C

install

p.

and

R.

an

nut.

post

binding

install

Use

posts

the

ground

a binding

external-internal

caps

at

locations

at

post

i:

2:;

1:

N

El

,{,;,tftl'[r)i:>

EXTERNAL-INTERNAL~'

LOCK

WASHER

6-32

J

Detail 13C

,~,

NUT

Detail 130

®

9'~~m~~1

®

~\~~~~~

0J

®

~

@

@

~.rJ

@

@

®

@

®

{5)

®

(~

®

©B

(g

@

~

[:n.oJ

~

®

I

®

QJ

~

~

S~UD

SPACE,

READ
IVE

DECOR

6-32

x 5/S"' SCREW

6-32

16

o

PICTORIAL

NUTS

AND
INCLUDED WITH
METER.

SOLDER

INCLUDED WITH

METE

WASHERS

LUGS

R.

Detail 13E

Detail 13F

( ) Repeat this procedure for another rocker switch to be

installed at location G. Do not use a solder lug at this
location.

NOTE: Control hardware,

of

consists
control nut.
13G and position

a control lockwasher, a control flat washer, and a

Place the control hardware as shown in Detail

the

Pictorial 13.

in

the following four steps,

controls and switches

as

shown in

NOTE: When you remove the meter from its carton,

to

avoid pulling off

( ) Refer

Use

the
overtighten the mounting
the

meter case.

the

front cover of

to

Detail13E and mount the meter

the

hardware included in the meter

nuts

or you could damage

meter.

at

location

box

use

"Do

care

B.

not

( ) Remove the shorting wire from betweeen the meter

terminals and discard it.

( )

Position the solder lugs toward the
instrument and bend them

out

bottom

of

the

from the back of the

meter as shown in Detail 13E.

( ) Install a rocker switch

two 6-32 x
and one

13F.

to

the edge

7/8"

#6

Position

solder lug in

the

of

the front panel

(#60-24) at location H using

phillips head screws, two

the

order shown in Detail

switch

so

that

its lower lug

than

to

the panel center.

1/2"

spacers

is

closer

Detail13G

CONTROL

LOCKWASHER

DU

AL

CONTROL

( )

Refer
trol
hardware.

to

(#12-96)

Detail

13G and

at

install

location F using

the

dual

control

con-

This
Set

completes

it

aside

until

the

it

is

front

called

panel

for

Page

subassembly.

later.

27

Install

(#63-487) (with

using

( )

Likewise,
quency

wires)

( )

Install

488)

the

prewired

control

at

the

at

hardware.

install

switch

location D using

prewired

location

Units

Frequency

the

white

wires)

the

prewired

(#63-487) (with

control

Multiplier

C with

control

o

switch

at

location

Tens

the

yellow

hardware.

switch

hardware.

Fre-

(#63-

E

o

( )

This

Refer

cord

retainers

the

rear

metal

ers

on

rear

panel,

completes

to

Pictorial

panel.

screws,

the

retainers

on

Use

Make

the

14 and

the

back

the

certain

fit

rear

mount

(painted

four
into

panel

the

two

side)

#6 x

1/4"

that

the

should-

the

holes

in

subassembly.

line

of

sheet

the

PICTORIAL

PICTORIAL

13

14

#6 X

META

J

)

)

l/4"

SHEET

L SCREWS

Page

28

UNIT ASSEMBLY

Refer

In
the

#6

6-32

( ) Mount

to

Pictorial

the

next two

chassis

lockwashers,

nuts.

ware
tion

15.

with two

the

at

the

location
cable

cable

15

steps,

one #6

clamp

clamp

~-~

for

the following

fasten

6-32 x 3/8"

X.

solder

under

See

as

the

Detail

shown

-~

-,11-------------------1

© @ @

8

PICTORIAL

steps.

rear

panel

to

screws,

lug, and two

the #6

15A.

in

two

hard-

Posi-

Pictorial

~

'bVO

15

SCREW

Detail 15A

Page 29

( ) Mount

#6

the

hardware

Use a #6

strip

under
and

mounting foot, and a

the

solder

Fasten
sis

the

assembly
switch
hardware.
Tighten
time.

( ) Likewise,

switch
hardware.
Now

tighten

and M.

Refer

for

( )

to

Pictorial

the

following

Fasten a side
chassis

lockwashers,

#6

Detail

2-lug

at

solder

nut.

lug

front

with

(#63-485)

Position

the

nut only

install

(#63-486)

Position

the

158

terminal

location

lug

Position

as

shown

panel

the

at

location L. Use

the

the

Square Wave Amplitude

at

location M with

the

control

16 (fold-out

steps.

rail

to

with two 6-32 x

and two 6-32

INSIDE

O(

CHASSIS

strip

Y.

See

under

the

#6

the

terminal

in

Pictorial

assembly

under

Detail
lockwasher

to the

the

15B.

terminal

strip

15.

chas-

Sine Wave Amplitude

control

switch

finger

as

shown.

tight at

this

control

switch

nuts

the

3/8"

at

from

left

screws,

as

shown.

location L

Page

26)

end of

the

two

nuts.

( ) Likewise,

of

the

chassis
Z. Use two 6-32 x
lockwashers,

a #6

lockwasher
terminal
terminal

( )

Mount
bezel
front
the
through
into

Fasten

the

side

panel

bezel

each

the

press-nuts

one

two 6-32 x

( ) Likewise,

rear

panel

( )

Install
through
rear

( ) Remove

the

the

panel

the

Position . the
studs
the

on one end of

handle in

two 6-32

Detail

16A

fasten a side

with a 3-1ug

3/8"

and two 6-32

is

used

strip

strip

mounting foot.

as

shown.

bezel

over

flanges into

the

the

flanges and the

with two 6-32 x

side

rail.

in the

side

rail

to

3/8"

screws.

fasten

with 6-32 x

four

side

the

other

6-32 x
rails

3/8"

and into the

flanges.

tape

from

the

handle

over

the

place

decorative

with two end

head

rail

to

the

right

terminal

screws,

strip

three

nuts. Notice

on both

sides

Position

front

panel.

space

between the

side

rails.

5/8"

Thread

front

the

panel

rear

side

the

flanges.

panel

rail

screws.

7/16"

spacer

front

ends of a handle.

the

two

instrument.

caps

screws.

end

at

#6

that

of

the

the

Fit

the

Secure

screws

screws

with

to

the

studs

and

spacer
Secure

and

( )

Refer
cutters,
shown.

to

Detail

cut

the 7 -lug

16A and, with diagonal

terminal

strip

as

( ) In

and
of

the

same

decorative

the

instrument.

way, mount the handle, end

head

screws

on the

other

caps,

end

Page

30

..----~,'

TOP

Refer

twisted

CHASSIS

to

Position
Prepare

wire.

WIRING

Pictorial

the
an

8"

Twist

pair.

( ) At one end of

gray

wire

to
the
of

) At

nect
gray
circuit
the

violet

the

the

chassiS

meter.

other

the

violet

wire

board.

wire

to

as

17

for

Generator

violet

these

this
the

end of

hole

Route

twisted

negative

to

the

wire

E

and an

two

this
to

the

shown.

the

as

shown.

wires

pair,

positive

twisted

hole

(S-l)

twisted

following

8"

gray

to

connect

(-) lug

(S-l)

(+) lug

pair,

D

(S-l)

on

the

generator

pair

PICTORIAL

steps.

hookup

form

a

the

and

(S-l)

con-

and

the

close

to

17

( )

Connect

Fll

circuit

( )

Connect
of

Connect
lug

F4

three

( )

steps.

Connect
control

( )

Connect
F4

( )

Connect
on

(j

the

orange

of

switch C to

board

the

(S-l).

white

switch C to

the

three

of

switch E as

the

longest

F (NS).

the

next

of

switch

the

generator

D (S-2).

the

remaining

hole

Route

wire

lug

white

longest

circuit

wire

J on

coming

F4

wires

directed

white

white

board

coming

the

the

wire

of

switch

coming

wire

white

wire

from

generator

as

shown.

from

lug

D (NS).

in

the

to lug 1 of

wire

to

to

hole K

(S-l).

lug

F7

from

next

lug

Page

31

Connect
R10 of
three

steps:

The
switch

( )

The
switch
white

The
generator

Connect
of

Connect
R5

Pass
ing

(S-2)

( )

Connect

sistor
control

the

three

yellow

switch D as

longest

C (S-1),

next

longest

E (NS). Route

wire.

remaining

circuit

the

brown

switch D to

the

brown

of

switch

the

stripped

from

lug 8 of

to

lug 3 (S-1) of

an

82

from

F.

wires

directed

yellow

yellow

lug

E to lug R8 of

lug 1 (S-2)

wire

yellow

board

wire

end of

kQ

wire

this

wire

(S-1).
coming

Rll

of

wire

coming

the

switch E through

control

(gray-red-orange)

to

coming
in

wire

to

switch

switch

brown

from

the

following

to lug R7 of

to

lug

R10 of

under

hole H on

from

lug

C (S-1),

from

D (S-3),

wire

F,

lug 2 (8-1) of

lug

the

the

R5

lug

com-

lug 6

re-

( )

At

the

the

brown

wire
Locate

( )

pilot

lamp

Strip
hookup

Place a 1-1/2"
of

the

lead

to

(S-2) of

3

other

wire

to

lug 3

the

neon

lens,

3"

of

insulation

wire

pilot

lug 2 (S-2)

terminal

end of

this
to lug 1 (S-2)
(NS)

lamp

and

cut

it

piece

lamp

leads.

and

strip

twisted

of

and

from a piece

in half.
of

the

pair,

and

terminal

insert

insulation

Then

connect

other

lead

Z,

connect

the

strip

it

into

of

brown

on

black

the

each

one

to

lug

Z.

( )

Connect
sistor
control

( )

Connect a 27
tor

from

nal

strip

( )

Prepare
3-1/2"

17"

black

17"

brown

( ).

Connect a 3-1/2"

control

of

(S-2). Be

( )

( )

Twist
together

Pass
opening
This

the

one end of

end

an

82 kQ

from

yellow

lug 4

F.

kQ

lug 1 (NS)

Z.

the

following

F (S-2)

sure

to

17"

black

to

form a twisted

this

at

the

rear

will

be

connected

(gray-red-orange)

(NS)

to

lug 5 (8-1) of

(red-violet-orange)

to

lug 2

(NS)

of

lengths

yellow

to

lug RIO of

solder

and

twisted

of

the

wire

both

the

17"

pair.

pair

chassis

later.

of hookup

from

lugs

brown

through

as

re-

resis-

termi-

wire:

lug 4

switch

at

RIO.

wires

the

shown.

E

NOTE: Always
so

the

positive
matches
board,
to

hold

soldered.
( ) Mount

NOTE: Both
however,
power
used.

the

See

the

tors

shown.

Mount
tors

Solder
the

excess

supply

Detail

capacitors

the

on

the

on the

all

circuit

you

Detail

positive

the

three

connections

will

circuit

17A

mount

(+)

17

A.

two 250

generator

300

power

lead

lengths.

boards

notice

board.

electrolytic

mark

(+)

on

mark

Bend

in

place

fJ.

F

electrolytic

circuit

fJ.

F

electrolytic

supply

to

the

are

four

These

the

open

capacitors

the

on the

leads

until

circuit

foil

and

now

complete,

holes

holes

capacitor

circuit

slightly

they

are

capaci-

board

capaci-

board.

cut

off

in

the

are

not

as

1"

I

2"

!

3"

I

4"

I

5"

I

6"

I

Page

32

BOTTOM CHASSIS WIRING

Refer

to

Pictorial

following steps.

( )

Position the Generator upside down

the

Pictorial.

( )

Pass

the
cable clamp
chassis as shown.

( ) Connect

(NS) and
transformer.

18

(fold-out from

black and brown twisted pair through

at

X and route them along

the

black wire

the

brown wire

o

-"CUT

OFF

r

HERE

the

OF

Detail

foil side

IT

Refer

to

Detail 18A and use

connecting a wire

1.

Cut a solder pin from its support.

to

Page

as

the

of

this twisted pair

to

lug 2 (NS) of the power

FOIL
SIDE

BOARD

l8A

the

following steps when

of

a circuit board.

35) for

it

is

rear

SOLDER

the

shown in

the

of

the

to

lug 4

( ) Connect the green wire coming from lug 3

to

solderlug N (S-l).

( ) Connect the blue wire coming from

to

solder lug J (NS).

( ) Connect a 560 n (green-blue-brown) resistor from

J (S-2)

to

lug 1

of

solder lug

( ) Connect the lead from the banded end of a .047

Mylar capacitor

as shown.

( ) Connect the other end

(NS).

( ) Connect the black wire coming from lug F5

to

solder lug K (NS).

( ) Connect a 5-1/4" black wire from solder lug K (S-3)

location

this wire directly

( ) Connect the blue wire coming from lug

to

( ) Using a solder pin, connect the 620 n (blue-red-brown)

resistor coming from lug R2
board hole G
the

AB

lug 2

of

switch frame.

to

the

(not screened)

to

the

switch H (S-l).

(S-l). Make sure the lead does not touch

switch H (S-l).

#6

solder lug on switch H (S-l)

of

this capacitor to solder lug K

on

the circuit board. Solder

foil

of

the circuit board.

of

switch L

of

switch M

lug

F6 on switch L

of

F4

of

to

JlF

switch L

to

switch L

circuit

2. Insert the
ridge.

Strip a

3.

4. Insert

CAUTION: Leave enough space between

top

the
and around

5.

( )

( ) Connect the remaining black wire coming from lug 2

of

Solder

U sing a solder pin, connect
coming from
(S-l).

switch M

pin into the circuit board as far as the stop

total

of

1/2"

of

insulation from the wire.

the

wire into the solder pin.

the

insulation and

the

solder pin

the

wire.

the

pin

to

solder lug P (S-l).

to

the

lug 2

so

the solder can flow into the pin

foil and

of

the

switch M

wire

to

the pin.

the

longer black wire

to

circuit board hole L

( )

( ) Prepare

)

( ) Twist together

( )

of

Using a solder pin, connect the blue wire coming from

of

lug 3

5"

end.
8"
8"

Using a solder pin, connect a
of

form a twisted pair.

At
to
switch

control L

the

green, strip

black
brown

control M (S-l)

one

end

lug I (S-l) and

G.

to

circuit board hole F (S-l).

following lengths

of

1/2"

to

circuit board hole B (S-l).

the

8"

of

this twisted pair, connect the brown wire

the

of

hookup wire:

of

insulation from one

5"

green wire from lug 3

black and

the

black wire

8"

brown wires to

to

lug 2 (S-l) of

Page

33

( ) At

( )

NOTE: A

this

and
approved
approved
steps,

The
one of
insulation
smooth,

( )

the

the

black

Y.

Connect
power

kit

in

some

making

flat

3-lead

its

Separate
distance
ends.
amount
end of
rate

other

wire

the

transformer

flat

3-lead

that

is
other

for

your

cord

and

changes

line

outer

along

and

the

the

of about

Twist

of

solder

each

strands

end of

approved

third

this

to

lug 2

brown

line

countries.

locality,

proceed

where

cord

supplied

leads

lead.
together.

marked

its

edge.
lead

three

1-1/2"

together

to

This

twisted

(NS)

wire

(NS).

cord

for

is

line

and

the

pair,

of

terminal

to

lug

is

supplied

use

in

If

this

obtain

with

the

necessary.

with

this

with

The

other

color

will

cord

from

sm

all

coded

leads

the

apply a

wires

hold

connect

strip

1 of

the

U.S.A.

cord

is

locally

following

kit

ribs

in

lead

green.

for

stripped

small
at

the

sepa-

the

with

not

an

has

the

is

a

the

120-240 VAC WIRING ALTERNATIVE

Two

sets

of

line

voltage
given below: one
the

other

the

In
while
common.
AGREE WITH THE LINE
AREA.

120

Refer

for

U.S.A., 120

in

some

USE

VAC

Wiring

to

Detail

Remove
of hookup

Connect a 1"
lug 2 (S-2) of

Connect a
lug 4 (S-

for

240 V
other

ONLY THE INSTRUCTIONS THAT

the

insulation

wire.

1"

3)

120

AC

line

VAC

is

countries

18B

for

bare

the

bare

of

the

wiring

wire

wire

instructions

VAC

line

voltage

most

commonly

240

VAC

VOLTAGE IN

the

following

from

two

from

power

from

power

transform

voltage, and

on

lug 1 (S-2)
transformer.

lug 3

Page

is

1"

lengths

(S-l)

are

34.

used,

more

YOUR

steps.

er

to

to

•

( )

Pass

the

rear

panel.

( )

Connect
solder

Connect

of

the

power

Connect

of

terminal

Connect
terminal

( ) Connect

minal

strip

line

the

lug

of Y (S-1).

the

the

strip

one
strip

the

other

Y (S-2).

cord

through

green

ribbed
transformer

smooth

lead

line

line

line

Y (NS).

of

Y (S-2).

fuse

the

cord

cord

(NS).

cord

lead

the

fuse

to

hole

lead

lead

lead

to

lug

in

the

to

the

to

lug

to

lug

lug 1 of

2 of

ter-

4

1

120

VAC

WIRING

Detail 18B

1"

I

2"

!

3"

I

4"

I

5"

I

6"

I

Page

34

240 VAC

Refer

Wiring

to

Detail

( ) Remove

hookup

( )

Connect a 1"
lug 3

Solder

)

Solder

18C

the

insulation

wire.

bare

(S-l)

of

transformer

transformer

for

the

from a 1"

wire

from

the

power

lug 1

(S-l).

lug 4 (S-2).

following

length of

lug 2 (S-2) to
transformer.

steps.

BACK

OF

REAR

PANEL

.~~~i-

1. PULL SLACK

2.

CR

IMP STRAI N

ONE

3.

COMPRESS STRAIN RELIEF

PASS INTO
FLATS
Of

HOLE.

4. PULL LINE
EXPAND STRAIN RELIEF .

....

------Detail

NOTE: In
the

flat
install
round
install

( )

line
strain

Refer

strain

OUT

INCH

FROM

HOLE

ON

STRAIN RELIEF WITH STRAIGHT SIDES

CORD

the

3-lead

strain

cord

relief

to

Detail

relief

.:.:::.~~

OF

CORD.

RELI

Ef

ON

REAR

IN

ON

CORD

PANEL.

SO

REAR

PANEL. LINE-UP

INSIDE

OF

THAT

180

following

line

relief

(not

step,

cord

supplied

#75-71.

supplied

#75-30.

18D and

on

the

line

ABOUT

IT WILL

INSTRUMENT

-----

if

you have

with

If

you have

with

install
cord.

TO

the

this

used

this

line

.....

used

kit,

a

kit),

cord

240

VAC

Detail

WIRING

l8C

This

completes
Square
solder

joints
nections.
splashes
proceed

the

Audio

Generator.

for

Remove any

that

may

to

the

Knob

wiring

Carefully

unsoldered

wire

be

lodged in

Installation

of

your

wires

clippings

the

section.

Heathkit Sine-

inspect

or

loose

or

all

con-

solder

Wiring. Then

<)::.:)(:

NUT

DRIVER

~

( )

Turn

switch

pOinter

the

stop

lines

knob

clockwise

positions.

up with

Check

each

to

each

to

panel

Page

see

that

marking.

of

35

the
the

SMALL

OPENING

KNOB

The knobs
ings
without
ing
remove

fully
with

remove

shaft.

36)

Single

Refer

( )

INSTALLATION

supplied

that

provide

the

use

of

steps

carefully

a knob bushing

inserted.

Each

particular

a knob,

Refer

for

Knob

Push
the
quency
trol

to

switch

Installation

to

Detail

single

multiplier

switch

shaft.

Pictorial

and

Then

switch

be

counterclockwise

( ) At one of the

pointer
clockwise
the

of a

knob

marking
slightly

'"

Detail

with

permanent

setscrews.

since

knob will

markings.

sure

to

control

19A

for

knob

bushings

switch

shafts,

turn

position.

switch

single

knob with

on
onto

KNOB

BUSHING

LARGE

KNOB

kit

use

~

OPENING

19A

this

positive

Perform

it

is

very

from

a knob

be

made

Whenever

replace

it

19 (fold-out

locations.

the

following

(#455-50) onto

shaft,

and

the

frequency

all

shafts

locations,

the.

the

panel.

the

knob bushing.

..

knob

gripping

the
difficult

once

on

the

from

the

two

to

their

line

full

counter-

Then

bush-

follow-

to

it

is

to align

you

same

Page

steps.

fre-

con-

full

up

the

press

NOTE:

pointer

1.

does

()

Perform

Turn
pOSition

2.

()

Remove
and
with

3.

( )

Press
bushing.
switch
alignment.
noticed
these

( )

Carefully

sembly.

( )

Place
surface;

completely

Press

( )

onto

the

( )

Repeat
install

( )

Turn

counterclockwise
zero.

( )

Repeat
the

installation

knob.

the

next

not

line

up

the

knob pOinter to

marking

the

turn

it

slightly

the

midposition

the

knob

Then

position

If

at

either

three

steps.

remove

the

assembly

then

press

into

the

the

knob and bushing

switch

the

knobs on

the

the

shaft.

above Knob

the

Frequency

above Knob

of

three

at

each

on

knob

to

slightly

turn

and

recheck

more

than a slight

end pOSition,

the

knob and

on a

the

bushing

knob.

Installation

remaining

control

and

set

Installation

the

steps

only

switch

the

the

panel.

from

line

the

up

the

marking.

onto

the

knob

the

bushing

table

or

other

firmly

assembly

switch

shaft

the

knob pOinter

Frequency

if

the

marking.

mid-

bushing

pointer

the

knob

to

each

pointer

error

is

repeat

as-

hard

and

firmly

steps

to

shafts.

fully

at

steps

for

control

BANDED

END

OF

.

047~F

MYLAR

I@

PICTORIAL

18

'/R/

/ 7 /

FIGURE

EATHKIT

1

-IV

~

AMPLITUDE~\!OlTS

1

.1,

I.

FIN

SQUARE

AMPLITUDE SWITCH

WAVE

[I--'-f-'I

PICTORIAL

19

Page

36

Dual

Knob

Installation

In the following
will be
panel.
you
was

lined

Whenever

replace

removed,

up with a

it

on

CAUTION: Look

shaft
form
has a round

at

on
hole

( )

knob bushing (#455-52)

the following

hole

the

other

end. Be

the

outer

shafts

is

toward

Refer
shaft

the

to

Detail

knob bushing (round
panel) on the
Amplitude and
switches.
their

Then

full

counterclockwise

I

NNER

SHAFT

KNOB

BUSHING

I

Detail 19B

steps,

the

specific

yOll

remove

the

control

very

carefully

steps.

at

one end and a

sure

of the

panel.

19B and

outer

shafts

Square

turn

NNER

SHAFT

KNOB

pointer

mark

on

each

on

any knob,

shaft

from

at

each

Note

before

that

you

the bushing

"keyed

you

place

the bushing

switches

so

the

place

hole

toward

of

the

Sine Wave

Wave Amplitude

both

switch

shafts

pOSitions.

the

front

be

which

outer

hole"

round

an

outer

knob

sure

it

per-

the

to

( ) Line up

with

the

the

pointer

-50

.003 pOSition of

of

Amplitude switch, and
way onto

Carefully

assembly
into the

( )

Replace

switch

( ) Repeat

the

bushing.

remove

and

knob,

the

knob-bushing

shaft,

the

last

press

three

the
the bushing

Wave Amplitude switch. Align

pointer

( )

Refer

knob bushing (#455-

control
and

turn

clockwise

( ) Line up

knob
the

( )

Carefully
sembly
into

( )

Before
place a felt
of the

( ) Replace

inner

( ) Repeat

inner

This

completes

with

to

shafts

Square

the

control

at

the 7

knob

and

the

knob.

replaCing

outer

the

shaft

the

shaft

the

.1 volt

Detail

19B and

51)

of the Sine Wave Amplitude

Wave Amplitude

shafts

positions.

the

pointer

part

way onto

remove

press

washer

shaft

a'

clock

the

the

the

knob bushing

on

knob.

mark

knob and bushing

the

knob-bushing

as

far

as

it

above five

knob and bushing.

the

Knob

Installation.

onto

an

outer

press

shaft

the

Sine wave

the knob

knob and bushing

all

the

assembly

steps

for

the

on the

Square

the

switch

push

each

an

pOSition.

inner

ofthe

small

controls.

to

their

full

counter-

of

an

inner

position; then

the

bushing.

bushing

all

press

the

assembly,

inner

shaft

in

assembly

onto the

will go.
steps

for

the

other

knob

part

way

knob

shaft

Then

shaft

as-

way

front

Page

37

CD

TWIST WIRE STRANDS

TIGHTLY

~ll'>~

WRAP

0)

TWISTED
AROUND

END

"

ALL I GATOR

TEST LEAD ASSEMBLY

( )

eLi

Prepare
leads

as
alligator
on

the

P

both ends of

shown

in

clip on one end and a

other

end of

the

red

Pictorial

each

test

and

20.
banana

lead.

black

Fasten

Do

PICTORIAL

test

an

plug

not

This
Proceed

20

solder

plug.

completes

to

the

the

wire

the

Tests

BANANA

~~

ends

CDTHREAD

OVER

that

INSULATOR

BANANA

go into

Step-By-Step

And Adjustments.

PLUG

PLUG

the

banana

Assembly.

Page

38

TESTS

AND

ADJUSTMENTS

TESTS

If you do
the

following

refer

charts
the
the
dition
The
section
helpful

Resistance
1500

Resistance
1500

to

list

Possible

Possible

information

Q.

"""

;"

Q.

before

in

not

obtain

tests,

the

the

Cause.

Cause

(Page

locating

measured

measured

the

correct

turn

the

chart

Condition of

following

Review

column

proceeding

in

the

57)

of

the

trouble

DIFFICUL

considerably

considerably

results

equipment

the

the

malfunction,

the

and

correct

to

the

In

Case

Manual

in

the

TV

step.

items

Of
may

kit.

in

any

off.

Then

These

listed

the

con-

next

step.

Difficulty

also

less

more

of

and

in

be

than

than

Refer
the

( )

Short

1.

2.

3.

Open

1.

2.

3.

to

Figure

following

Connect
either
Connect
point
board.

stops.

Check
Check
Check
board

Check
Check
Check

(TP1) on the wave

sistance

circuit

positioning
values

for

foils.

circuit(s)

solder
resistor

for

1 (on

fold-out

step.

the

common

black

The

binding

the

other

ohmmeter

of

at

POSSIBLE CAUSE

on wave

of

solder

on wave

connections.

broken

ohmmeter

least

1500

generator

of

transistors.

resistors.

bridges

generator

values.

component

lead

post

should

Q,

from

Page

of

an

ohmmeter

of

the

Generator.

lead

generator

indicate a re-

when

the

circuit

between

circuit

leads.

36)

for

to

test-

circuit

pointer

board:

circuit

board:

to

39

Page

( )

40

Measure

flat

prongs

POWER

the
should
on,

the

the

resistance

of the

switch

read

infinite. With

resistance

AC

line

off,

should

between

cord
the

the

POWER

be

20 n

the

two

plug. With

resistance

switch

or

more.

Resistance

switch

off

Resistance

)

Check
plug

.

should

( )

Check

ground

chassis.

zero

measured

and

measured

the

resistance

prong

measure

the

prong

This

ohms.

DIFFICULTY

20 n

infinite

with POWER

near

between

and

the

chassis.

infinite

resistance

of

the

line

resistance

DIFFICULTY

or

more

zero

ohms.

for

between

cord

should

with POWER

switch

each

line

The

resistance

both

prongs.

the

plug

and

be

on.

cord

round

the

near

POWER

POWER
cord.

switch

switch

POSSIBLE CAUSE

installed

connected

POSSIBLE CAUSE

upside

directly

down.

across

line

Resistance

( ) Set

about 43

( )

Connect
black
meter

not

the

voltmeter

binding

lead

as

volts.

the

voltmeter

to

described.

to

read a DC+

common

post.

Connect

TPl.

lead

the

voltage

to

either

other

volt-

of

Line

cord

connections.

( )

Turn
line

cord

( )

Turn

the

reading

volts

43

not

wired

the

POWER
into a 120

POWER
should
and

properly.

gradually

stay

switch

VAC

switch

there.

Check

OFF,

and

outlet.

ON.

Thevoltmeter

increase

line

cord

plug

to about

the

Page

41

Measured

than

zero.

No

voltage.

Measured

( )

Turn

This

concludes

ments.

voltage

voltage

the

POWER

the

DIFFICUL

less

than

about

50

volts.

switch

tests.

Proceed

TY

43

off.

but

VDC

more

1.

2.

3.

1.

2.

1.

to

the

Adjust-

ADJUSTMENTS

Diode

Poor
Capacitors
backwards.

Transistor
Open

supply

Zener

D5

or

solder

circuit

circuit

diode D7.

POSSIBLE

D6

installed

connections.

Cl,

C2,

improperly

or

short

board.

CAUSE

backwards.

or

C3,

installed.

circuit

C4

installed

on

power

Two

methods

are

provided

an

AC

Page

42)
scope.
use
This

Symmetry
tively

ADJUSTMENTS WITH

Set

NOTE:
to
controls.
on

Use

the

will

with

the

switches

)

POWER SWITCH:

MULTIPLIER:

TENS FREQUENCY: 10.

UNITS

FREQUENCY

The

the

small

each

for

adjusting

below.

voltmeter,

uses

the

Audio

enable

control,
only a voltmeter.

FREQUENCY:

word

knob on

COARSE

of

the

and

an

AC

second

Generator

you to

which

and

XI0.

control:

FINE on

AMPLITUDE

the

Audio

The

first

method

the

second

voltmeter

method

with an

adjust

cannot

AC

VOLTMETER ONLY

controls

OFF.

O.

the

each

refers

and an

if

the

be

as

follows:

O.

front

of

the

to

the

switches.

Generator

uses

only

method

you

oscilloScope.

square

done

panel

AMPLITUDE

large

oscillo-

intend

wave

effec-

refers

knob

(on

to

( ) SINE

) SINE

NOTE:

the

Figure 1 for

at

its

WAVE

10

volts.

WAVE

Fully

clockwise.

SQUARE

(coarse):

SQUARE WAVE AMPLITUDE

Fully

clockwise.

600 Q LOAD SWITCH: EXT.

The

wave

center
BIAS.
FEEDBACK.

SYMMETRY.
METER

AMPLITUDE

AMPLITUDE

WAVE

10

volts.

following

generator

their

location.

of

rotation.

CAL.

controls

circuit

switch

control

AMPLITUDE

control

are

located

board.

Position

each

(coarse):

(fine):

switch

(fine):

on

Refer

to

control

Page

42

Plug
Turn

the

the

Adjust
panel
0-10

Set

meter

scale.

the

AC.

( ) Connect

to

the
Connect
sine

wave output binding

( )

Rotate
until

the

the

0-10

( )

Disconnect

NOTE:
panel
cally.
ties,

During
meter
This

make

increments

stabilize
( )

Turn

after

the

(fine) to

tion.

Adjust
maximum

Turn

the

control
Adjust

panel

meter

line

POWER

the

FEEDBACK

external

the

external

black

the

other

cord

reads

sine

into

an

switch

ON.

control

between 6 and

voltmeter

to

voltmeter
wave output binding
voltmeter

lead

post.

the

panel

scale,

the

pOinter

is

normal.

the

and

each

METER

the

control

allow

CAL

meter

as

the

external

following

may

If

you

adjustments

the

adjustm

control

reads

voltmeter.

voltmeter.

adjustments

seem

to

encounter

instrument

ent.

SINE WAVE AMPLITUDE

approximately

the

BIAS

control

panel

meter

SINE

WAVE

fully

clockwise.

the

FEEDBACK

reads

the 3 o'clock

until

reading.

AMPLITUDE (fine)

control

10

volts.

AC

until

8 on

read

10

common

to

the

clockwise

the

same,

vary

difficul-

in

time

control

you

obtain

until

outlet.

the
the

volts

lead

post.

red

the

errati-

small

posi-

the

on

to

( )

Readjust
panel

This

Generator.

AC

plug

Assembly

ADJUSTMENTS
OSCILLOSCOPE

Set

the

POWER SWITCH:

MULTIPLIER: X100.
TENS

FREQUENCY

NOTE:

to

the
controls.
each

SINE WAVE AMPLITUDE

a

) SQUARE W AVE AMPLITUDE

) 600

the

meter

completes

Turn

from

the

on

Page

controls

FEEDBACK

indicates

the

adjustments
off the
socket.

45.

WITH

and

AC

switches

control

10

volts.

power

Proceed

VOL

TMETER

as

of

and

remove

with

follows:

OFF.

FREQUENCY: 10.

UNITS

of

FREQUENCY:

The

word

small

knob on each of

COARSE

the

AMPLITUDE

control:

FINE on

refers

O.

O.

the

front

the

to

the

switches.

panel

AMPLITUDE

large

switch

10

volts.

SINE WAVE AMPLITUDE
Fully

clockwise.

control

SQUARE WAVE AMPLITUDE

(coarse):

10

volts.

control

Fully

clockwise.

S1

LOAD:

EXT.

until

the

Audio

the

Final

AND

refers

knob

(coarse):

(fine):

switch

(fine):

the

the

on

NOTE: In
can

be

detected

will

not

control.

)

Turn
position,

in

the

cates

( )

Turn
hon,
in

the

cates

the

following two

in

the

be

necessary

the

TENS FREQUENCY

10

through

position

the

the
Xl

position

the

where

lowest

voltage.

MULTIPLIER
through

X1000.

where

lowest

voltage.

panel

to

readjust

100.
the

the

steps,

meter

Leave

panel

switch

Leave

panel

if

no

reading,

the

feedback

switch

the

meter

to

eachposi-

the

meter

change

it

to

each

switch

indi-

switch

indi-

NOTE:
the

wave
Figure
tion.

1 (fOld-out

Position

tation.

BIAS.

FEEDBACK.
SYMMETRY.
METER

The

generator

CAL.

following

from

each

control

controls

circuit

Page

at

are

board.

36)

for

its

located

Refer

their

center

loca-

of

on

to

ro-

Page

43

Plug the line cord into

Turn the

Adjust
reads between

Set

Connect the external voltmeter common lead to the
black sine wave
voltmeter lead
post.

( ) Adjust

reads

Disconnect the external voltmeter.

Set
an amplitude

Connect

( )

binding posts.

POWER switch ON.

the

FEEDBACK control until the panel meter

6 and 8 on

the

external voltmeter

the

METER

the

same,

the

oscilloscope to display a 1000

of

the

oscilloscope

A

an

AC

the

to

output

binding post. Connect the other

to

the red sine wave

CAL

control until the panel meter

on

the 0-10 scale,

10 volts.

to

B

outlet.

0-10 scale.

read 10 volts AC.

output

as

the

voltmeter.

Hz

the

sine wave

binding

waveform at

output

c

( ) Turn the TENS FREQUENCY switch

10 through 100. Leave the switch in the position where
the

panel meter indicates the lowest voltage.

( ) Turn

( ) Readjust the FEEDBACK control

( ) Reset

( ) Connect the oscilloscope

NOTE: The very fast rise time (leading edge)
wave signal
megahertz range. Low frequency oscilloscopes may respond
in various ways
"rounded
oscilloscope, or frequency compensation (with peaking coil,
for instance) may lead
leads between the generator and oscilloscope may affect the
pattern displayed.

the

MULTIPLIER switch
through
the panel meter indicates the lowest voltage.

meter indicates 10 volts.

for a

XIOO,

binding posts.

XIOOO.

the

1000

TENS FREQUENCY

is

off"

Leave the switch in the position where

FREQUENCY and MULTIPLIER switches

Hz

output at 10 volts (MULTIPLIER at

at

10).

to

the

Set the oscilloscope input switch

very rich in harmonics, extending into the

to

this signal. The leading edge may be

through the roll-off characteristics

to

"ringing" or "overshoot". Even the

to

each position,

to

each position,

so

that the panel

square wave output

to

AC.

of

the square

of

Xl

the

C\

v

TOP

CLIPPED

( ) Rotate the FEEDBACK control fully clockwise. Note

that

the

clipped as shown in part A or B

( ) Adjust

waveform are clipped equally, as shown in
Figure

( ) Adjust

indicates

( ) Disconnect the oscilloscope.

NOTE: In the following two steps, if
detected in
to

readjust

the

2.

the

the

the

feedback control.

BOTTO'v1

ell

P?ED I

AS

REef

SE;

Figure 2

positive or negative half

BIAS control

FEEDBACK control until the panel meter

10 volts.

panel meter reading, it will not be necessary

so

of

the waveform is

of

Figure

both

no

change can be

2.

halves of the

Part C of

A B

INCORRECT

INCORRECT

SYMMETRY CONTROL

SET

CORRECTLY

c

Figure 3

( ) Rotate the SYMMETRY control until the positive and

of

negative halves
shown in part C

This completes the adjustments. Turn
remove
Assembly.

the

AC

the square waveform are equal,

of

Figure

3.

plug from the socket. Proceed

off

the power and

to

as

Final

Page

44

6-32

x 1/4"

HEAD

PHilLIPS

SCREW

PICTORIAL

21

FINAL

ASSEMBLY

Refer
Locate eight 6-32 x

two

( )

to

Pictorial

cabinet

Turn
one of
x

1/4"

of

protrude

) Remove

foot. Affix the foot about

edges

the

half

the

instrument

the

phillips

cabinet

over

the

at

21

1/4"

shells,

cabinet half

head

is

the bezel.

backing

one

corner

for

the

following

phillips

and

upside down and

shells

screws.

the front;

paper

of the cabinet bottom.

head

four

plastic

with

The angled edge

this

edge should

from

1/4"

steps.

screws,

feet.

install

four

6-32

a plastiC

from

both

Likewise, affix
the

other

Turn

other
phillips

(

Remove the
and white
as

shown.

This

completes

Audio

Generator.

the

three

corners

the

instrument

cabinet half

head

screws.

protective

label

and affix

the

assembly

remaining

of

over

shell

with four 6-32 x 1/4"

paper

three

the

cabinet bottom.

and

from

it

to

the

of

the

Sine-Square

feet

install

the blue

rear

panel

on

the

HE.ATHKIT@

45

Page

46

PANEL METER

Monitors
two

output

wave 3
Internal

600 n

External
nal

the

sine

voltage

scales

POWER ON-OFF SWITCH

n LOAD SWITCH

600

Functional

on

six

ranges.

Nonfunctional on

volt

and

(INT):

load

across

(EXT):

load

from

output.

SINE WAVE OUTPUT

wave

output.

and

one

lowest

sine

10

volt

Connects

sine

wave output.

Disconnects

dB

scale.

ranges.

internal

inter-

Has

wave

sine

TENS FREQUENCY SWITCH

Selects

first

MUL

TIPLIER

Multiplies
FREQUENCY (Hz)
trol

bv 1, 10, 100,

the

SWITCH

frequency

figure

switches

or

1000.

SINE WAVE

Coarse
ranges,

rms

set

and

(-50

of

frequency.

on

the

con-

AMPLITUDE

amplitude

from

to +20 dB).

adjustment.

.003

volts

SWITCH

to

10

Eight

volts

PILOT

LAMP

Indicates

when

SQUARE WAVE OUTPUT

CIRCUIT

GROUND

'Connected

earth

ground.

SQUARE WAVE
SWITCH

Coarse
ranges:

peak.

amplitude

.1,

I,

and 10

AMPLITUDE

adjustment.

power

to

chassis

volts

is

on.

and

Three

peak-to-

to

CIRCUIT

GROUND

SINE WAVE

Fine

amplitude

sine

wave output

mum

of Sine Wave

setting.

AMPLITUDE

adjustment.

from

zero

Amplitude

CONTROL

Adjusts

to

maxi-

switch

Figure

4

SQUARE WAVE AMPLITUDE
CONTROL

Fine

amplitude

square

maximum

switch

adjustment.

wave output

of

Square

setting.

from

Wave

Amplitude

Adjusts
zero

to

OPERATION

Refer

front

read

FREQUENCY SELECTION

To
UNITS

EXAMPLES:

to

Figure
panel
the

select a given

remaining

FRE

QUE

controls

NC Y switches

4, which

and

material

frequency,

describes

terminals,

to

SWITCH AND CONTROL SETTINGS

each

before

in

this

set

the

TENS

correspond

of

the

you

section.

and

with

the

first
figure
to

the

correct
switch
switch
tiplying

two

is

required,

to

the

and

control

factor.

figures

number.

appropriate

of

set

Then

settings

the

frequency.

the

FREQUENCYcontrol

set

the

MULTIPLIER

position

by

to

the

required

multiply

If

a

third

the

mul-

SELECTED
FREQUENCY

1520 Hz

15.2

HBlATHKIT®

60
60

400

Hz
Hz
Hz

kHz

MULTIPLIER

Xl
X10 0
X10
X100 10
X1000

FREQUENCY

TENS UNITS FREQUENCY

60
40

10

FREQUENCY

0
6
0
5
5

CONTROL

0
0
0

.2

.2

47

Page

48

SINE WAVE AMPLITUDE

The

output

terminated

of

the

Audio Generator must be properly

to

obtain accurate meter indications.

To obtain correct meter readings with a high impedance load
(10 Jill or more); set

SINE

the

WAVE

the

600.Q LOAD switch

AMPLITUDE switch

to

INT, and set

to

the nearest full
scale value above the desired output level. Then adjust the
SINE

WAVE

AMPLITUDE
on the proper meter scale. EXAMPLE: For
of

7.3 volts, set

volts. Then

turn

the

the

give a 7.3 reading on

For

an

output

of

AMPLITUDE switch

AMPLITUDE control

controlto

SINE

WAVE

SINE

WAVE

the

0-10 scale of the meter. EXAMPLE:

give

the desired

an

output voltage

AMPLITUDE switch

AMPLITUDE control

.025 volt, set the SINE

to

.03 volt. Then

to

give

a 2.5 reading on the 0-3 meter

turn

the

SINE

output

to

10

to

WAVE
WAVE

scale.

600

.Q

To obtain correct meter readings with an external
(1

volt maximum

to

EXT and proceed

SQUARE WAVE AMPLITUDE

To select a square wave
SQUARE
that

includes the desired voltage. Then adjust the FINE

SQUARE

WAVE

WAVE

output

signal level): set the LOAD switch

as

before.

output

AMPLITUDE switch

level, set the COARSE

to

the

lowest range

AMPLITUDE control until the required

voltage is produced. The front panel voltage ranges

and lOv) are for loads

level may be measured with a high impedance
or with an oscilloscope. Remember
measured in peak-to-peak volts and that most

of

2000

.Q

impedance or more. Output

that

a square

AC

AC

load

(.lv,

lv,

voltmeter

wave

voltmeters

indicate rms volts.

CAUTION: The square wave generator

avoid poor low frequency response (see "Square

to
Testing" on Page 52). The

to

from zero

some positive value when measured

output

is a

output

DC

signal

is DC-coupled

Wave

that

varies

at

the

r------,

>---:--1

I G -18

600

I G -18

600

output

terminals.

DC

circuitry without using capacitive coupling. (Observe
proper capacitor polarity.)
at

maximum

IMPEDANCE MATCHING

(1O.0V')

is

In general, impedance matching is

if

However,

close matching is required, matching pads may be

constructed using composition resistors as shown in Figure 5.
This Figure shows two examples for matching
output

to

different input leads. Since these pads also act as

voltage divider networks,
the

voltage indicated

---.

!

}p70\2

I I
I

\2

I I

I 1-300\2 I

I I

I I •

I I

I.

______

r-------,

I

,

I

I

I

I

\2

I
I

I

I

I

L

______

Figure

Do

not

connect this generator

output.

by

the

I

\

:

300<;)

LOAD

J

I
I

I

560

\2

I

I

750.

72\2

LOAD

I

..I

5

Do

not

short the

not

the

input voltage will be less than

panel meter.

output

critical in test work.

output

terminals

the

600

into

.Q

dB

MEASUREMENT

The

red

scale
decibel
or
the

Since P =

equation

(dB)

comparison,

equation:

dB

10 log

EI

may

on

the

panel

comparisons.

of

power

PI

P

2

and

I = E

R

be

restated

E12

meter

The

levels.

the

as:

is

decibel

It

is

above

used

is a ratio,

defined

for

by

of

power
level
these

equal

to:

dB

dB

dB 20

into a 600 ohm

may

be

used
circuits
and

==

cancel

log

10

10

log

Rl

log

load.

in

600 ohm

and

R2

in

out,

simplifying

2

E

J

-

2'

or

E

z

(~):

E

E2

or

J

circuits

the

above equation

This

standard

the

expression

Page

49

only. In

are

dB 10

While
pression

used

levels

After
partly
industry

the

between

as a quantitative

is

defined

various

accepted

settled

Rl

log

E

_2

R

decibel

as a standard

levels

as

on a

,2

z

is

basically a relative

two

power

levels,

expression

level.

in

several

"standard

standard

industries

levels",

level

it

if

one of

the audio

of 1

milliwatt

can

were

ex-

be

the

Accordingly, with the
the

signal
on a
on

the

appropriate

As

zero

load,
or

E = .775

dB

mark

meter

output, you

voltmeter,

Generator

calibration

dB

is

and

P =

V.

is

in

scale.

such

or

defined

E2

,then.OOl

R 600 • ,

It

is

line

with the 7.75

standard

can

read

as

the

any

other

(dB

scale).

as 1 milliwatt

=

for

this

reason

600 Q

load

relative

front

panel

voltmeter

in

~~

,

orE

that

mark

on the

across

power
meter

with

the

a 600 Q

= '\16-

the

zero
0-10

APPLICA

SINE WAVE TESTING

TIONS

Gain and

common

make
performed
tests, a single

separately,

Figure 7 shows

single

from

the

dance

the

connecting
circuit
capacitor
any

distortion
types

with

this

on

stage

the

Generator

input of

matching

matching

of a

in

DC

voltage

or

or a complete

the

the
transistor

series

INPUT SIGNAL

checks

of

sine

wave

Generator.

an

amplifier.

amplifier

the

entire

typical

amplifier

is

pads

Signal

that

amplifier

connections

may

be

deSirable,

described

directly

or a tube,

with

the

maybe

®

rvwv

SINE-WAVE

are

probably

tests

Usually

In

either

stage

amplifier.

connected

being

tested.

you

on

signal

present

®

rlJ'v

LOW

BIAS

the

most

that

you

will

these

tests

are

of

these

may

be

tested

may

be

tested.

for

testing

The

output

directly

If

can

I"'nl,.,t1"nt't

Page

48. When

to

the

input

use a coupling

lead

to

block

in

the

circuit.

©

~

HIGH BIAS

a

to

To

t'est

the
amplitude
measure
to

the

ratio

input

voltage.
with a
response
gain

amLpljifi€;r
comIlaI'ed
SOllay'e

tortion

shows

voltmeter

at

various

Generator.
is

waveform

W

10%

2ND

HARMON I C

DISTORTION

voltage

(voltage) into

the

resulting

of

tests

can

with

present

gain,

the

output

This

or

+nay

be

frequencies.

be

di::;pl.ayed on

the

input

This

and,

s of

CD

rvv

10%

3RD

HARMONIC

DISTORTION

feed a signal

the

amplifier

output.

measurement
an

oscilloscope.

made

the

if

several

The

voltage

by

an

oscilloscope

sine

wave

test

will

so, what kind.

kinds

N

APPROX.

3RD

HARMONIC

DISTORTION

Fr'eqtuency

signal

from

indicate

of

distortion.

®

20%

of known

input and

is

equal

by

the

be

made

the

from

an

and

the

Sine-

if

dis-

Figure

6

50

@

rvvv

PRONOUNCED

2ND

HARMONIC

DISTORTION

TYPICAL

®

1fL

PRONOUNCED PRONOUNCED

3RD

HARMONIC

DISTORTION

DISTORTION PATTERNS OBTAINED IN AUDIO

Figure

CD CD

Vv

4TH

HARMONI C

DISTORTION

6

JUST STARTING DISTORTION

®

'VU

OVERLOADING PRONOUNCED

OF

INPUT

DISTORTION

AMPLIFIER

ruu

OVERLOADING

TESTING

TYPICAL

TRANS I STOR

AMPLIFIER

8+

TO

S

TAGE

S+

TO

NEXT

NEXT

STAGE

OSC I LLOSCOPE

STAGE

I G -18

TYPICAL

AMPLIFIER

TYPICAL

TUBE

AMPL F

UNDER

TEST

SINE-WAVE

Figure 7

STAGE

TEST

Page

52

SQUARE WAVE TESTING

Square

fiers,

several
cause
waveform
the
monics

ation,
ferent
the

The

quency

cause

frequencies,

vertical

high

of

tal

10 kHz

amplifier

Figure 8 shows

sponse
loscope.
rounded

harmonics

of
low

Square
test
oscilloscope.

waves
since

tests

the

square

made

fundam

ental

ofthat

the

square

frequencies,

fundamental

flat

top

response

the

flat

portion

harmonic

the

amplifier

frequency.

would

from

patterns

If

the

off,

are

the

square

frequency

wave

the

response

are

very

useful

one

square

simultaneously.

wave

up of

many

frequency·

frequency.

wave

tests a circuit

from

frequency.

of

the

square

of a

circuit.

top

more

or

short

of

burst

the

frequencies

to

about

Thus,

check

10 Hz

the
that

two

the

frequency

to

types

might

corners

it

means

that

missing.

wave

is

response

tests

are

of

the

Connect

the

for

testing

wave

is

sine

and

Therefore,

will

This

occurs

actually a complex

waves,

all

of

the
in

at

one

tenth

to

wave

tests

the

This

happens

closely

square

ten

settings,

of

that

times

resembles

DC

voltage.

wave

test

the

the

fundamen-

100 Hz

response

100,000 Hz.

of

square

be

seen

on

of

the

square

some

If

the
tilted,
of

the

also

vertical

square

of

flat

it

means

amplifier

an

excellent

amplifiers

wave

the

top

ampli-

perform

be-

which

are

odd

har-

one

oper-

many

dif-

ten

times

low

fre-

be­low

The

contains

response

of

wave

re-

an

oscil-

wave

higher

portion

that

is

faulty.
way

of

to

the

and

an

are

the

to

an

os-

cilloscope
the

square

The

Generator

detrimental

makes

especially
For

example,
ments
connect
to

the
nect
connector
can

now
stages
controls,
the

signal

SPECIAL

Impedance Measurements

sine

the

on

the

input

the

square
be

without

vertical

wave

wave

can

effects
use
easy

an

sine

of

of

made

input

on

the

and

square

be

used

at

to

of

recurrent

with

this

when

making

amplifier

wave

the

stage

wave

output

the

oscilloscope.

through a number

readjusting

of how

GENERATOR APPLICATIONS

Figures
input

iIrIPE:ctalll(~e

circuit.

m~~tllod

an

amplifier

is

Impei::1aI1CE!S

V!ll'i,~hllp

and

check

oscilloscope

wave

the

same

either

waveform.

sweep

instrument.

stage

with

an

output

of

being

to

the

the

oscilloscope

sm

measured.

all

how

exact

if

if

it

that

impedance,

resistors

as

10

correct

the

shape

screen.

outputs

time

of
without

oscilloscopes

gain

measure-

oscilloscope,

the

Generator

Con-

external

Measurements

of

amplifier

or

how

large

to

measure

or

of a

similar

the

impedance

is

reactive,

are

high

com-

use

9A.

It

may

of

several

100

kn, 1 Mn,

indication

on

of

your

This

sync

sync

the

For

the

be

the

GOOD

HIGH

RESPONSE

POOR

FREQUENCY

Figure

8

EXCESSIVE

HIGH

FREQUENCY

RESPONSE

Ivl

B B

I G -18

a a Q

~

@,

\

0°

@og

Page

53

VARIABLE
RESISTOR

h

r

IC

~

.:~

9'9

A

I I

AMPLIFIER

UNDER

TEST

AC

VOLTMETER

,Ivl

Set

the

Generator

20 Hz,

the

venient
the

value of
until the

former

resistor
pedance of
variable
meter.

frequencies,

be
shorted
plifier.

For
or
ure
least
ured.
tant
voltage
fore,

short

signal

reading

short

the

reading

value. The

is

resistor

If

smaller

out by

low input

less,

connect the

9B.

Fixed

ten

times

The

if

it
is

with

a a Q

B B

9\

@, @

I G

-18

to a low frequency,

out the

level

of

the

on the

from

then equal to

the

this

because

value of
is
set

variable

the

variable

on

amplifier.

can

same

the

input impedance would

the

input

impedances,

series
the

input

made

to

some

($

og

~

variable

Generator

AC

variable

resistor

the

meter

resistance

be

check

some

.

circuit

resistor

resistance

this

resistor

large

convenient value,

resistor

resistor,

voltmeter.

is

drops

of

the

unknown input

The

resistance

measured

were

of the

capacitance

of a few hundred

signal

as

shown

Rl

enough. The output

R2

RI

R?

such

and

to give a con-

Remove

resistor.

then

to

the

with an

made

of

should

to be

is

not

disconnected.

adjusted

1/2

of

variable

of

ohm-

at

higher

appear

would

the

am-

ohms

in

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be

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as

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The

im-

I

Figure 9

as

set

the

the

to

be

at

~~

1

~

,

UNDER

When
the

value. The

is

plifier.

FREQUENCY

An
to
Place

selector
nect a sine
horizontal
the
the
make

When

justed
of the unknown signal, .and
properly
figures
terpreting
the

"')(

c!!:>

AMPLIFIER

TEST

R2

is

meter

then equal

oscilloscope

measure

unknown

oscilloscope.

frequency

reading

resistance

the

in

the

input of the

these

tests.

the

size

to

approximately

adjusted,

will be

these

connected again,

to

the input

MEASUREMENTS

the

frequency

oscilloscope

horizontal

wave

frequency

of

waveforms

of the unknown

~

AC

drops

of

and

the

from

to

Do

not

the

generator

waveforms

seen

on

:a

VOLTMETER

B

9'9

I

it

is

adjusted
to half of
variable

resistance

Generator

of an unknown
horizontal

input pOSition. Con-

the

Generator

oscilloscope.

the

use

the

same

the

the

oscilloscope.

correctly

signal.

the

resistor

of

the

can

be

frequency

Connect

vertical

square

oscilloscope

called

input of

waves to

signal

size

Lissajous

will show

former

signal.

to the

is

as

until

R2

am-

used

ad-

that

is

In-

Page

54

VERTICAL
TANGENT-i---i
1I

NE

HORIZONTAL

TANGENT

LINE

UNKNOWN

To

FREQUENCY

KNOWN

measure
Generator
close

to

Part

as

A of

revolve
assumes
line

to
again, a
etc.

Often,

the

circle

When

the

screen,

then

exactly

tor,

as

cy

of

the

racy

of

A

FREQUENCY

EQUALS

an

unknown

frequency

you

can

Figure

in

such

each

of the following

the

left,

an

slanting

it

will be

from

revolving.

circle

the

is

frequency

equal

shown on

the

measurement

the

Generator

UNKNOWN

3x

KNOWN

FREQUENCY

frequency,

until

the

adjust

10.

a way

it

to

This

the
circle

that

ellipse, a circle,

line

to

the

almost

displayed

to

the

impossible

on

of

the

frequency

Generator

is

the

frequency.

UNKNOWN

1/2

KNOWN

D

EQUALS

FREQUENCY

pattern

circle

may

it

adjust

com

alternately

the

es

shown

appear

forms: a slanting

an

ellipse,

right,

an

ellipse,

to keep

the

oscilloscope

unknown

dial.

same

of

the
The
as

the

signal

Genera-

accura-

accu-

FREQUENCY

Figure

as

in

is

EQUALS

FREQUENCY

10

Unknown
quency
by

USing

as

the
Figure
the

oscilloscope

frequency

quency

frequency

a

matter

of

the

the

following

Unknown

In

the

that

touch

Generator

loops

frequencies

limits
ones

10.

of

unknown

more

In

of
the
of

of

of

the

complex

shown

these

the

unknown

the

simple

signal

formula:

Frequency

above

formula,

the

horizontal

frequency;

which touch

that

Generator

Lissajous

in

Parts

cases,

gives

the

Generator

signal.

UNKNOWN

are

the

Signal and

FREQUENCY

2x

KNOWN

beyond

can

be

patterns,

B,

C,

D,

pattern

ratio

between

Determining

unknown Signal then

arithmetic.

can

Th

=

be

calculated

X F

The

Tv

This

the

number

and T v

the

tangent

vertical

line; F is

is

the

tangent

C

EQUAL

FREQUENCY

the

fre-

measured

such

and

E of

shown on

the

the

fre-

the

becomes

frequency

using

of loops

the

number

of

line.

Page

55

FROM

SQUARE

Fast

formed

erator
capacitor.
will

that

The
on
you
width
as

the

and
menting,
in

-------­freq.

WAVE

GENERATOR

.

=-~~~,

~

PULSE

the

the

frequency

the

'----

MEASUREMENTS

rise

at

by

See

eliminate

are

not wanted.

size

of

desired

wish

is

that

positive

capacitor

but a close

following

1

of

square

©

.--H)\-

--1"-r

-9::J-

time

the

the

the

to

f®~

Figure

trigger

square

addition of a

Figure

the

positive

resistor

frequency

have. A rule

it

should

one-half

desired.

are

generally

approximation

manner:

x

wave of

To

find

the

A DIODE

CAN

ALSO

BE

ADDED

-----L~t~-~.---~----

k

______

A_.

-V-------

OUTPUT

11

pulses

wave output of

11.

The

and

and

be

of

The

sizes

1/2 = time

PULSES

can

easily

the

singh~

or

of
about
the

resistor

addition of a diode

negative

capacitor

how wide a

thumb

1/10

square

of

found

square

the

can

of

pulses

depends

for

as
wave,
resistor

experi-

be

1/2

cycle

wave

be

Gen-

and

pulse
pulse

wide

at

found

capacitor
ohms
.000001
constant

usually
millionths
the

reSistor

produce

value

of

For

example,

frequency

1 x

10,000

The

following
constant
capacitor

pulse.

500 x 10

500 x 10-

= 5

size

will

by

the

capacitance

farads).

of

the

expressed

of a

and

the

pulse

either

of 10 kHz:

1/20

of a 10

will

-12

1 x

104 (reSistance,

8

microseconds

of

the

pulse

give,

multiply

The

answer

two

parts

in

"microseconds"

second).

capaCitor

or

if

you want

calculations

give

(capacitance,

= 5 X 10-

If

width you want,

both

parts.

= 5

microseconds

kn

resistor

the

desired 5 microsecond

6

that a resistor

the

resistance

in

"farads"

will

be

and a portion

the

"time

constant"

you

choose

change

positive

show

10

kn)

= .000005

that

and

.0005

pulses

iJ.F)

=

(1

the

of

does

the

.0005

x

and

in

iJ.F

time
time

(one-

of

not

the

at

time

iJ.F

=

a

The

above x

quantity
Collecting

of

1

square

freq.

wave

in

fractions

the

above

1/10

together

x

1/20 = time

width of

of a

second

we get:

for

average

average

of

pulse

pulse

width

pulse.

Another
is

as

follows:

.0000000005

way

this

time

x 10,000
.000005 = 5

constant

(capacitance,
(reSistance,

microseconds

can

be

.0005

10

kn)

calculated

iJ.F)

Page

56

IN

1.

2. About of

3.

4.

CASE

Recheck

colored

checked.
friend
familiar

consistently

repair

connections

troubles

connections

as

described

Kit

Check

their

sistor

Check

proper

cuit

the

pencil

It

check

with

do not function

can

Builders

to

be

proper

lead

the

parts

as

shown

is

values

wlrmg.

on

the

is

frequently

your

work.

the

unit

overlooked

the

kits

and

soldering.

be

eliminated

to

make

in

the

Soldering

Guide.

sure

that

locations.

connected

of

have

been

in

the

OF

Trace

Pictorial

helpful

Someone who

may

notice

by

that

are

properly

Therefore,

by

sure

they

all

transistors

Make

sure

to

the

the

parts.

wired

Pictorial

DIFFICULTY

each

lead

as

to

have a

is

something

the

builder.

returned

due to

many

reheating

are

soldered

section

proper

Be

into

Diagrams.

each

sure

each

of

are

tran-

point.

in

it

is

not

for

poor

all

the

in

the

cir-

It

would
62

kn

620

kn

have

5.

Check

foreign

wiring,

6.

If

the
meter
ings

against
Diagram. A review
tion

NOTE:
on
physical

NOTE:

difficulty, refer

"Kit

information on Page 59

Refer

Page

67

location

In

an extreme case where you are unable

Builders Guide", and

be

easy,

(blue-red-orange)

(blue-red-yellow)

been

installed.

for

bits

matter

or

on

trouble

is

available,

may

to

and

to

the Service and Warranty sections

for

example,

of

solder,

which

the

circuit

still

is

not

check

those

help

the

Photographs

of

shown on

of

you

Circuit

parts.

to

the

of

this Manual.

wire

may

board

located

the
locate

Board

on

"Factory

to

resistor

resistor

ends,

be

lodged

foil.

and a volt-

the

voltage

the

Circuit

the

X-RayViews

Page

Repair Service"

install

where

should

or

other

in

the

read-

Schematic

Descrip-

trouble.

69

for

the

to

resolve a

of

the

a
a

:E:EAT:E:KIT®

57

Page

58

TROUBLESHOOTING CHART

Pilot

lamp

No

sine

or

wa ve output.

B+

voltage

no

B+

voltage.

DIFFICUL

lights.
square

low

or

TY

POSSIBLE CAUSE AND SUGGESTED CURE

1. All

2.

3.

4.

5.

6.

controls

Measure

the

generator

low

or

there
Difficulty on
Feedback

control
Adjustments
Check
Q3
Open
Wrong
or

in

that

filam

faulty

transistors

order.

part

(units and
other

frequency

set

B+

circuit

is

no voltage,

this

section

ent

in

value,

part

tens

at

zero.

voltage

board.

Chart.

not

setproperly.

on Page

Ql,

lamp

Ll.

improper

in notch

switches).

settings

at

point A on

If

the

voltage

refer

to

the

(Refer

41.)

Q2, Q5, Q4, and

connection,

filter

circuits

checks

to

test

this

sibility.)

Measure

board

"Tests"
than
page
sistance

at

1500

to

the

the

resistance

TPI

on

Page

(2,

generator

is

1500 n

as

apply

of

the

&"U"""~V"

described

39.

If

'"

the the

'-'u

"".....

'"

check

step

previous

If

the

the

lowing:

Transistor

1.

2.

Diodes

3.

Zener

4.

CapaCitors

5.

Transformer

D5

and

diode

Cl

C2, C3, and C4.

primary

windings.

the

is

next

to

at

pos-

circuit

under

less

re-

fol-

No

sine

wave output.

Square

No

wave output ok.

square

wave output.

Sine wave output ok.

Bottom of

goes

below

square

zero.

wave

1.

Short
wave output

2.

Check

3.

Check

1.

Short

wave output

2.

Symmetry

3.

Check

Check

4.

5.

Check

6.

Frequency

1.

D8

circuit

control
capacitor

circuit

transistors
control
capacitor

open

.•

or

excessive

terminals.

RI06.

C6.

or

excessive

terminals.

trimmer

Q6, Q7, and Qa.

RI0l.

ca.

set

too low.

not

load

load

adjusted

at

sine

at

square

properly.

Page

59

Meter

DIFFICUL

inoperative.

TY

Sine wave output ok.

Sine wave

FACTORY REPAIR SERVICE

You

can
Company
for a

minimum
modified will not
wish, you

Authorized

listed

in your Heathkit catalog.

To be eligible
terms

of
factory
Authorized
by the invoice

either.

slip,

If

it

If

it

will be

is

Heath Authorized

to

the

factory
follow

the

Prepare

distorted.

return

Service

can

the

repair

you

your

Department

service

be

deliver

Service

for

warranty,

service,

Service

or

send

returned

completed

fee.

accepted

your

Center.

replacement

equipment

or
Center,
the

sales

the

original

to you.

not convenient to

Service

at

Benton

following shipping

a

letter

in duplicate, containing

kit

delivered

must

deliver
Center,
Harbor,

following information:

• Your

• Date of

•

• The invoice

A

name

brief

and

return

purchase

•

description

or

sales

address.

of the difficulty.

either.

kit

to

the

to

have

it

(Kits

that

have

for

repair.)

to a

nearby

These

centers

parts

under

returned

to a Heath

be accompanied

slip,

or

a copy of

invoice

your

please

Michigan and

instructions:

slip,

or

a copy of

Heath

repaired

been

If

you

Heath

are

the
for

or

sales

kit

to

ship

the

POSSIBLE CAUSE

1.

Check

2.

Check
Meter

3.

4.

Meter
WARNING: When
continuity,
range

1.

Feedback
Bias

2.

3.

Check

4.

Check

5.

Improper

erator

6. Low

line

• Your
unit

and shipping

parts

Attach
this

letter
aging,
tant

information. Send
letter
Attention:

Michigan.

Check
screws
cabinets
plifiers,
damaged

a

it

ment

a

in heavy

strong
INCHES of
paper,
the

equipment and

with gummed

strong
Parcel

Heath Company
Service
Benton

AND

SUGGESTED CURE

diodes
control

pointer

coil

of the

control

D3

R21.
stuck.

open.

use

only

ohmmeter.

control

not

set

and D4.

testing

the

set

too high.

correctly.

the

highest

Q10.
Q5, Q4, Q1, Q2, and Q3.

ground connections between Gen-

and

associated

equipment.

voltage.

authorization

back

the

to you C.O.D.

not

covered

envelope containing one copy of

directly

so

that

we do not

by

separate

Service

the

equipment

are

in

place.

Department,

when shipping

or

TV

sets,

in shipment.) Then,

paper.
carton,
resilient

excelsior,

etc.)

paper

cord.

Ship

Service,

it

or

to

ship

for

charges,

by the

plus

warranty.

to the unit before·

overlook

the

second

mail

to Heath Company,

Benton

to

see

that

(Do

not include wooden

receivers,

as

these

wrap

Place

and put

packing

the

carton.

the equipment

at

material

on

all

Sides, between

Seal

tape, and

by

prepaid

insured

express,

parcel

Department

Harbor,

Michigan 49022

meter
resistance

the

repaired

the

service

the

cost

this

impor-

copy

of

Harbor,

all

parts

tuners,

are

the equip-

least

THREE

(shredded

the

carton

tie

it

with a

United

post

for

of

pack-

the

and

am-

easily

in

to:

SPECIFICATIONS

SINE WAVE OUTPUT

Frequency

Output Voltage

Internal

dB

Ranges.

Output
Output Indication. •

Output Impedance. • • • • • • •

Range. • • • • • • •

Ranges

Load.

Variation.

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

•

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

•••••••••••••••••

. . .

. . . ....... .

••••••••

.........

••••••••

1 Hz

to

100 kHz.

o - .003

0-.01

o - .03
o -

.1

o -

.3

o - 1

0-3

o - 10

Internal

.03,

-

62

-12

-

50

+2

dB

±1

dB

Two voltage

panel

10 volt
3

volt

1

volt

600 0

.1,

.3,

to

+22 dB.

to

+2

dB on

to

+20 dB

maximum
from

meter.

range:
range:
range

load

and 1 volt

meter;

in

eight 10 dB

into 600 0

10 Hz

to

scales

0-1000 O.

800-1000 O.

and

lower:

available

ranges.

switch

load.
100 kHz.
and one dB

600

O.

on .003,

positions.

scale

on

.01,

front

Meter

60

Accuracy.

• • • • • • •

•••••••••

±10% of full

scale

with

proper

load

termination.

HEATHKIT@

~::

N

Hz:::

11111111

111111111 111111111

PERCENT

DISTORTION-TYPICAL

<=>
<=>
<=>

o 0
o 0
o 0

N

Page

61

00

11111

00

00

1"""\

'"=t~

ill

I

.,.

<=>

<:>

Distortion.

Type Of

SQUARE WAVE OUTPUT

Frequency
Output Voltage

Output

Rise

GENERAL

Frequency

Time.

• • • •

Circuit.

Ranges.

Ranges.

Impedance.

. • • . • . .

Selection.

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

•

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

• •

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

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

•

. . ..... .

...........•

Less

than

.1%

Differential
output. Notch

5 Hz

to

0-.1

V,

n

or

higher

52

non

Up

to

220 n on 10 V

Less

than

First
switches
Third
Multiplier

two
figure

amplifier

100 kHz.

0-1

V,

load.

.1 V and 1 V

50

significant

each

switch:

from

10 Hz to 20 kHz.

with

filter

and

nanoseconds.

in

on

ten

0-1

Xl,

frequency

0-10

Vzero-to-peakinto

ranges;

range.

figures

steps.

control.

XI0, X100, XI000.

complementary

determination.

on

0-100

and 0-10

pair

2000

Frequency
Power

Dimensions.

Net Weight. •

Error. • ••

Requirements.

•

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

. . . . . .....

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

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

The

Heath Company

continue
tions
tion
previously

instruments

at

any

to

incorporate

time

sold.

reserves

and

without

new

Within ±
105-125

Watts.

5-1/8"

7lbs.

to

change

incurring

features

5%

VAC

high x

the

right

specifica-

any

in

instruments

of

first

or

13-1/4"

to

obliga-

and

second

210-250 VAC,

wide x

dis-

digit.

7"

50/60

deep.

Hz, 6

Page

62

CIRCUIT

DESCRIPTION

Refer
Schematic
reading

The

to

the

this

circuit

BlockDiagram

Diagram

Circuit

of the

(fold-out

Description.

Sine-Square

on

Page

from

SINE

The

sine

wave

differential
voltage
transistors

negative feedback loops.
feedback

. of

base

arm

Negative (degenerative) feedback
the
base

amplifier

comes

transistors

of

transistor

of feedback

notch

filter

of

transistor

oscillator

amplifier

transistor

Q4

and

from

Q4

and Q5, and

Q2

control

and

Ql.

circuits

transistors

Q3;

Q5;

and

Positive

the

common

through

R7, and

is

directly

65

and to the

Page

75) while

Audio

Generator

WAVE

consists

Ql

and

power

the

is
the

amplifier

positive

(regenerative)

emitter

coupled to

lamp
resistor

comes

coupled to the

output

Ll,

through

includes
Generator
ator

circuits),

the

Power

described

GENERATOR

The

of

Q2;

and

the
the

R6.

tuned

circuit

where F is
in
ever,
network
two
then

may

F=

ohms, and C

since

capacitances,

becom

three

principal

(including

the

Supply.

separately.

frequency
be

calculated

1

2 rr

RC

frequency

this

notch

in which

es:

sections:

the

meter

Square Wave

Each

of

of

by

in

hertz, R is

is

capacitance

filter

there

are

the

formula

The Sine Wave

and output

Generator

these

Sections will be

the

RC

notch

the

general

in

is a specialized

two

resistances

for

formula:

resistance

farads.

this

network

attenu-

and

filter

How-

RC

and

Oscillation

Without negative feedback,

oscillate

ever,
quencies except the one to which

provides

transistor
oscillation
is

not

late

at

HEATHKIT®

occurs

at

some

the

notch

the

Ql.

at

passed,

only

the

due

to

the

positive

the

indeterminate

filter,

negative feedback to

This

all

frequencies
permitting
selected

which

negative feedback

frequency.

frequency; how­passes

except

the

system

feedback.

circuit

it

is

the

prevents

the

all

tuned,

base

one

to

oscil-

would

fre-

of

that

Since

mula

to:

1

1

-oJ

C1 C

2

F=

2rr~2

Rl

and R2 will always be equal,

simplifies

F=

•

the

for-

63

Page

64

In

the

notch
Generator
resistors

R=

re'pr1eSI:mt:s

the

Tens

quency.

sistor,

or
resistors.
resistors

filter

R

may

in

parallel;

the

Frequency

This

resistance

a combination of

For

are

selected

Hz the two 2500 n

;::

2500

n,

for

60

2500

n

;::

1670

Ry

represents

th~

Units
quency.
to

that

that

the

of

the

resistors

n.

Frequency

The

of

the Tens

resistance

Tens

are

the

operation

Frequency

in

the Audio

consist

of one

or

several

or

;::

resistance

switch

for

may

value

a

consist

selected

of one

several

for

20

Hz

the

two 5000 n

and

Rx

;::

resistors

5000

are

for

Hz both the 5000 n the

selected

resistance

switch

of.

Frequency

values

for

this

in

<laJl

value

selected

aparticularfre-

switch

switch,

are

ten

times

dLJ.ea

is

identical

those

switch.

C

y

fre-

re-

40

and

DC

voJXa~re

gain

"'LGU/Le.,

•

Bias
age

The Signal
rect
of voltage
lector
base
base
difference
and

ml;:nt:ary-pair

base

bias

is

divider

and

control

of the

differential

The voltage

and

therefore

adjustable

control

divider

with

from

coupled

amplifier

of Q3,

of and

of

between

provided

that

R7. (ReSistor R3

at

by being

R9, which

R8

the

from

the

the

signal

through

These

form

an

amplifier

to

Ql

consists

of

amplifier

at

the

lower

the

bases

connected

is

connected

and RIO.

differential

collector

transistor

is

direct

diodes

diodes

the

maintain

bases

emitter

with no voltage

and

resistors

decreases

to

make

end of

of

Q1

in a

amplifier

of

Q2

Q3.

From

coupled

Dl

and

of

transistors

follower

Impeliarlce output. The output Signal

coupled

t1"i('n:,.~,l"

to

the

and to

square
the

sine

wave

this

and

to

the

arm

DC

to

the baSI

the col·

to

D2

to

a 1.2 vol

circuit.

wave,

volt.

is

di·

thi
thl

Q'

fron

R

represents

z

Frequency
frequency.

and
tiplier
10

times

positions

represent

switch. The

larger

of the

As shown in the
tuned

proportional

capacitances.
in

frequency

to

Therefore,

frequency

for

using

must

decrease

Multiplier

Any tendency of
of

increaSing

If

the

rent

is

fed
through
the

filament
causes
in

resistance

the

base

lated

its

resistance

of

transistor

from

of the

the

resistance

when

the

value

than

Multiplier
general

of a notch

the value of

the

resistance

a tenfold

tenfold.

the

oscillator

output

the

increased

lamp

to

attenuates

transistor

value of the

adjusted

CalJa(~lt()rs

for

of C

the

value

::;WllL:;'l.

formula

to

F

filter
its

resistances

achieve

is

;n,,,,::,,,,,,,::,l,,

an

increase

decrease.

increase

switch,

i'/,\,nvo."\rh",,,

is

controlled

increases,

feedback

current

to

heat

slightly, which

This

the

feedback to

The

result

"''''IS,''''''''''

by

more

circuit

causes

increase

is a regu-

and

cur-

and

OUTPUT ATTENU,ATOR

sine

tn,,,,,,

••

,.,.n

control

through

circuit

The

resistor

switch

(RI09

wave Signal

capacitor

RI06.

From

isolating

and

to

the

network

comprise

to

from

C6

to

Sine Wave

RI06,

the
resistor
Sine Wave Anopllittlde

sections

an

which

proportionately

voltage divide:

the of 10 dB each.
volta.lre

neeted
lowest

Resistor
of

monitoring
and

bridge

the

load

level

The

internal

across

output

CIRCUIT

RIOa and

a voltage

signal

by

resistors

rectifier

is

rem

the

ranges.

from

the

to the

aining

load

output

meter

section

resistor

terminals

calibration

divider

resistor

panel

meter.

R24 and R25

circuit

for

sine

R122

through

RI07

is

Diodes

form

the

is

cmrpliel

Arnp:Utllldl

swncn

of thi,

divide:

The

selectel

wave outpu

of the switcl

to

be con,

in the

control

which

somE

bypassedfm

D3

and

a half-wavE

output

meter,

st

R2]

D4.

Page

65

DIFFERENTIAL

C

AMPLIFIER

01,

02

NOTCH

J

FILTER I

I

r--

I

L...-.

AMPLIFIER

05,

SQUARE

The square
Q6
attenuator. The square wave
trigger circuit, which is triggered a sine
coupled through resistor
the base

wave

section consists

and Q7, a power Q8,

RI5

of

Q6.

of

is

produced the Schmitt

and Sy-mmetry control

a Schmitt trigger circuit

and

VOLTAGE

03

SCHMITT

TRIGGER

06,

07

POWER

SUPPLY

D6, 010

the square

wave

signal

1---+43

EMITTER

POWER

EMITTER

POWER

FOLLOWER

AMPLIFIER

04,

AMPLIFIER

08

VDC

BLOCK DIAGRAM

WAVE

wave

that

is

RI6

to

GENERATOR

The switching

This voltage varies with the rising and falling voltage of the
sine wave input. Symmetry control
produce time intervals between switching on and switching
off

that

symmetrical square wave.

05

FOLLOWER

is controlled

are

ATTENUATOR

SW

ITCH

~

ATTENUATOR

S

WI

TC

H

by

the voltage on the base of Q6.

RI6

of

equal length; therefore, producing a

ru

~

is adjusted

to

Schmitt trigger circuit has two stable states: one in

The

which Q7

which
between these two states is extremely short, which permits
the circuit

time.

is

conducting and Q6 is cut off, and the other in

Q6

is

conducting and Q7

to

produce a square

is

cut off. The switching time

wave

with a very fast rise

POWER

Dual-primary

wired
VAC,

to

The

rectified

tifier

ing

circuit,

of

capacitors

operate

output

by

diodes

and

power

from
from

D5

filtered

C1

transformer

either
the

and

and C2

120

secondary

D6

in

by

the

pi

and

a full wave

T1

VAC

of T1

filter

consist-

resistor

can

or

be

240

is

rec­R27.

The

Schmitt trigger output from the collector of transistor

Q7

is coupled through capacitor

follower transistor Q8, which provides a low impedance
output
excessive negative voltage. The
directly

with no voltage

to

Square

RIOl, the square

network
wave

on

the Square

output terminals.

Wave

wave

gain.

is

Wave

C8

to

the base of emitter

D8 protects the base

outpu! from

Amplitude control RIOl. From

applied through the attenuator

Amplitude switch

of

Q8

Q8

to

the square

SUPPLY

Zener
voltage
sistor
volts,

the

diode
QI0,

for

D7
the
which

CapaCitor C4

sine

wave

provides a regulated

base

of voltage

regulates

grounds

generator

the

at

regulator
DC

AC

feedback

high

reference

tran-

output

at
from

frequencies,

from

passes

43

Page 66

CIRCUIT

BOARD

X-RAY

VIEWS

(VIEWED

FROM

FOil

SIDE)

POWER
CIRCUIT

(VIEWED

SUPPLY

FROM

BOARD

FOIL

SIDE)

67

Page

68

H

ON

LUG

51

12

-R111

eTO

R121
R118

RH3

HEATHKIT®

ON

LUG

11

-R114

CONTROL

R107

Rl08
R1l2

RHO

R109

R101

R120
R117

R119
R104
R102

69

Page

70

RZ

RZ

RX

RX

RX

RX

RY RY

RY

RY

CX

CX

OR

CY CY

CX

OR

R123

RX

RX

RX

RX RY

RY

RY RY

CX

OR

CY CY

REPLACEMENT

PARTS

The

following

from

the
U.S.A.
to
Service
cover
side
from
additional
of

To order parts, llse
kit.
Replacement Parts in

PART

RESISTORS
1/2

1-54
1-66
1-97
1-98
1-89
1-16
1-20
1-47
1-29

destination.

the

price

Center

local

the

your

exchange.

If

a Parts Order Form

PRICE

No.

Each

Watt

prices

Heath

U.S.A.

Company

when

or

sales

tax,

parts

local

Heathkit

transportation,

the

the

.10

.10
.10
.10
.10
.10
.10

.10

.10

PRICE

WAVE

apply

Add
ordering

Heathkit

postage

and

Parts Order Form furnished with this

"Kit

DESCRIPTION

15

n
150 n
1100 n
1600 n
2400 n
4700 n

kn

10
56

kn
220

only

on

where

10%

source

Builders Guide".

kn

shipment

(minimum

from

an

Electronic

and handling. Out-

service

taxes,

is

are

and

duties

not

available, refer

authorized

will

LIST

GENERATOR

purchases

is

to

25

cents)

Center

available

and

to

reflect

rates

to

PART

~

a

CONTROLS

10-155

10-201

DIODES-TRANSISTORS

56-26
56-56

57-65
417-94

417-154
417-201

HARDWARE

250-89
254-1

259-1
252-3
250-175
254-7
252-51

MISCELLANEOUS

PRICE

Each

.35
.40

.25
.20

1.35

1.00

1.65
.50

.05
.05
.05
.05

.05
.05
.05

DESCRIPTION

750 n

10

kn

Crystal
Silicon
Silicon

2N3416

2N2369

X2

6-32 x 3/8"
#6
#6

6-32

2-56 x 3/8"
#3

2-56

diode
diode
diode

transistor

transistor

9A82 9

lockwasher
solder

lockwasher

transistor

lug

nut

nut

screw

screw

1 Watt

1-56-1

CAPACITORS

20-128
21-16
25-200

HE.A.THKIT®

.10

.35
.10
.50

1200 n

pF

470

.01

f1.F

.68

f1.

resin
disc

F

electrolytic

206-24
412-66
85-257-2
331-6
200-516

490-5

.15
.75

1.25
.15

1.40

2.00
.10

Lamp
Lamp

generator

Wave
Solder
Chassis
Manual
part

number.)

Nut

starter

clip

(See

circuit

front

cover

board

for

"71

Page

72

PART

No.

RESISTORS-C APACITORS

1-1

1-89

25-126

DIODES-TRANSISTOR

56-66
57-65
417-178

PART

No.

PRICE

Each

.10
.10
.50

.90

1.35

1.50

PRICE

Each

--

DESCRIPTION

47 n

1/2

2400 n

50

f-.L

F

VR

43
Silicon
40389

DESCRIPTION

watt

resistor

1/2

capacitor

zener

diode

diode

transistor

POWER

watt

resistor

SWITCH

SUPPLY

PART

No.

HARDWARE

250-89
254-1
252-3

MISCELLANEOUS

54-205
85-256-2
344-50
344-52

PRICE

Each

,05
.05
.05

4.20
.75
,05/ft

PARTS

PART

No._

PRICE

DESCRIPTION

6-32 x 3/8"
#6

lockwasher

6-32

nut

Power
Power
Black
Red

wire

wire

screw

transform

supply

DESCRIPTION

--~-------

er

circuit

RESISTORS

1-83
1-84
1-66
1-94
1-63
1-131
1-96
1-97
1-98
1-89

1/2

Watt, t%

2-249
2-248
2-247
2-50
2-97
2-98
2-99
2-11

CAPACITORS

20-55
27-84

.10
.10
.10
,10
.10
,10
.10
.10
.10
.10

.20

.20

.20
.20
.20

.20

.25
.25

.20

.75

56

n

62

n
150 n
390 n
510 n
620 n

750 n
1100 n
1600 n

2400 n

2500 n

(2.5
3300 n (3.3
5000 n

10
25

33,3
50

100

500

.005

(5

kn
kn

kn

kn

kn

pF

f-.LF

kn)
kn)

kn)

Capacitors

27-83

27-82
27-81

SWITCHES-CONTROL NUT

63-485

.05

f-.LF

,5

f-.LF

5

f-.LF

8-position
control

63-486

3-position

control
63-487
63-488
252-7

WIRE

344-50
344-51
344-53
344-54
344-55
344-56
344-59

2.15

.05/ft
.05/ft
.05/ft
.05/ft
.05/ft
.05/ft
.05/ft

ll-position

4-position

Control

Black

wire
Brown
Orange
Yellow

Green

Blue

wire

White

wire

nut

wire

wire

wire

wire

rotary
rotary

rotary

rotary

with

5000

with 400

Page

73

PART

~

RESISTORS

1-95
1-23
1-102

ELECTROLYTIC

25-193
25-205
27-110

CONTROL-SWITCHES

12-96
60-24

PLASTIC

70-5
70-6
75-17
75-30

75-71

100-16-2

100-16-18
100-699
207-3

261-28

413-10

261-30

PRICE

Each

.10
.10
.10

.60

1.30
.20

1.15
.50

PARTS

.10
.10
.10
.10

.10
.10

.10
.15
.10
.05
.10
.10

DESCRIPTION

560
27
82

CAPACITORS

250
300
.047

1

Mn

Rocker

Black
Red
Binding

Line

round

Line
cord

Binding

Binding
Binding

Cable

Plastic
Red
Line

n

kn
kn

JJ.F
JJ.F

test

pilot

JJ.F

dual

switch

test

cord

cord

cord

clamp

foot

cord

CHASSIS

Mylar

control

lead

insulator

lead

insulator

post

base

strain

strain

post

cap,

post

cap,

post

cap,

lamp

lens

retainer

insulator

relief,

relief,
black

red
green

flat

PARTS

PART

No.

Other Hardware

252-7
253-10
254-4
252-32
427-3

METAL

90-401-2
100-769
100-770 1.50
100-771
204-759-1
210-35
211-32

WIRE

Hookup

344­344-51
344-54
344-55
344-57
344-58

Other

89-23

341-1

341-2

KNOBS AND BUSHINGS

50

Wire

PRICE

Each

.05
.05
.05
.05
.10

PARTS

2.60

1.55
.85

.15

2.90
.35

Wire

.05/ft
.05/ft
.05/ft
.05/ft
.05/ft
.05/ft

.75
.10/ft
.10/ft

DESCRIPTION

Control
Control
Control
Speednut

Binding

Cabinet

Front
Rear
Side
End
Bezel
Handle

Black
Brown

Yellow
Green
Violet
Gray

Line
Black
Red

nut

flat

lockwasher
post

half

panel

panel

rail

cap

cord

test

test

lead

washer

base

shell

lead

HARDWARE

#6 Hardware

250-227

250-26
250-304
250-89
250-229

250-303
250-365

254-1
254-27

255-15
259-1
252-3

.05
.05

.15
.05
.05

.15

.05
.05
.05

.05
.05

.05

6-32 x
screw
6-32 x 5/8"
6-32
6-32 x 3/8"
6-32
screw
6-32 x 1/4"
screw
#6 x
#6
#6
washer
#6 x
#6

6-32

7/8"

x

7/16"

x

1/4"

1/4"

sheet

lockwasher

external-internal

1/2"

spacer

solder

lug

nut

phillips

screw

spacer

screw

phillips

decorative

metal

head

head
head

screw

lock-

stud

455-50
455-51 .10
455-52

462-245 .25
462-247
462-276

MISCELLANEOUS

253-85
260-16
407-131

412-15

431-41

431-35

432-27

438-13

259-20

421-22

.10
.10
.35

.25

.05

.10

10.60
.20
.10
.10
.40
.15
.05
.35

Single knob
Inner

shaft
Outer
Single knob
Outer
Inner

Felt

Alligator

Meter
Neon
2-lug

7

Line
Banana

Solder

3/4

-lug

shaft
shaft

shaft

washer

clip

lamp

terminal

terminal

cord

plug

pin

ampere

bushing

knob

bushing

knob
knob

knob

strip
strip

adapter

slow-blow

bushing

fuse

Page 74

NOTES,

I.

RESISTORS
ARE

NUMBERED

100-199

2,

ALL

RESISTORS

VALUES

3,

ALL CAPACITORS

4.

ALL SWITCHES

fROM

THE

5,

V INDICATES

6,

-:::-INDICATES

7.

REfER

FOR

THE

8,

O+DC

BOARD

CCW,

ALL

9,

D+DC

fULLY

AND

CAPACITORS,

IN

THE

0-99

ARE

IN

KNOB

TO

THE

CHASSIS PHOTOGRAPHS

PHYS

ICAL LOCATION

VOLTAGES

CONTROLS

AMPLITUDE SWITCHES

VOLTAGES,

CW,

FOLLOWING GROUPS,

PARTS

MOUNTED

PARTS

MOUNTED

ARE

1/2

OHMS

(k·10001.

ARE

IN

SHOWN

IN

END,

COMMON

CHASSIS GROUND,

TO

EITHER
fULLY

THE

EXCEPT

THOSE

ON

CIRCUIT

ON

CHASSIS,

WATT

UNLESS

~F

UNLESS

fULL

CIRCUIT

SAME

MARKED OTHERWISE

COUNTERCLOCKWISE POSITION

GROUND,

Of

PARTS,

COMMON

CCW,

ALL

AND

AS

ABOVE,

BOARDS,

MARKED OTHERWISE, RESISTOR

AND

CIRCUIT

OUTPUT
FREQUENCY

CONTROLS

EXCEPT

IN

THE

BOARD

TERMI NAL.

SWITCHES

fULLY

SYMMETRY

NOTCH

FILTER

(pf'PICOfARADI,

X-RAY VIEWS

All

AND

CW,

VOLTAGES

CONTROL

WHEN

CI

RCUIT

CONTROL

CIRCUIT,

VIEWED

±]O%,

TRANS I STOR,

DIODE

Ql,

Q2,

Q4

Q3,

Q5

Q6, Q7,

01, 02, 05, 06

Q8

QI0

D3,

04 56-26

PART

417-

411-201

417-154

417-178

57-65

NUMBER

94

MAY

REPLACED

2N3416

2N2369

40389

Sill

100

PIV,

IN

CON

19]

BE

100

BASING DIAGRAM

WITH

rnA

C

B@E

C

S@E

II

EOC

WI

DE

SPACE

B

E~C

WIDE

SPACE

D7

D8

56-66

56-56

ZENER

VR43 1

IN4149

WATT

Page

75

(D-CX-G)

@-ot-CY...-.@

Hz

0
10
20

30
40
50

60

70

80

90

100

XI000 {

Rx

=

10k
5000

3330

2500
2000
1670

1430
1250

1110
1000

Xl

f

XI0 I
XI00 I

®

WHT

NOTCH

FRONT

f'IL

WAFERS

"'-----------------

'"

'"

'"

TER

Rx

10k

5000

3330

2500

-

COMPLETE

I(

.05

II

. 005

I(

500

pF

CIRCUIT

REAR

WAFERS

®

YEL

MULTIPLIER

S W I

TC

H

TENS
FREQUENCY

SWITCH

Hz

o

10

Hz

o

~

1 + 82k

Ry

=

lOOk
SOk

33.3k

25k

20k

16. 7 k

14. 3 k

12.

5k

11.

lk

10k

Rz

0::>

t

"'-----------------+---_._-'--------,-_._------"

",,,,,,,

cp

82k

Rz

,-----

/

/

/

/

{ • 1

Ry

100 k

SDk

33. 3 k

25k

MEG

------,

1

MEG

,

,

, "

..

Rz

'

cr

82k

UN

ITS

FREQUENCY

SWITCH

FREQUENCY

CONTROL

WAFER

, 0

RED ®

.......

+

--,

COARSE.

)---------------="----{"(O

AMPLITUDE

'l.-J

~OU'TPUT

---'
.'.K
GR"

-e

r

I

RI03

5!0

IUO;?

510

RIOI

400

RIOS

RI04

OUTPUT

ru

~

--,

1

CIO

.... _--;._.,.....{BLK

J"0.047

56

62

FRONT

WAFER

FRONT

WAFER

REAR

SWITCH
OF

END

KNOB

FROM

WAFERS AS SEEN

ALL

THE

GENERATOR

OF

AUDIO

TIC

HEATHKIT®

SCHEMA

IG-18

MODEL

SINE-SQUARE

Rl09

2400

.J

GENERATOR

____________

WAVE

----

SQUARE

1_

~o~~

':I~C~I~

:'E~E~~~
~V:.

~

1

GENERATOR

WAVE

SINE

R2

1100 10K

HI

,>4

56K

__________________

'OK

,>;"

____________

L

I I

--,

z

SLK

Y

-

® +

~------~~--_1--------~----~--~~

.!!9~1il

@Q10

.£I~U.!!

:f7

!:Q~'LS~~

05

~

1_

:

I

----I

c)(

-------------

K

I I

I

r---

1--

I I

:

J

CIRCUITI

~

SIMPLIFIED

~

RX

:

I I

I I

I I

I I

I I

I I

I I

I I

I I

I I

I I

I I

:

FILTER

____________________________

I I

I I

I I

[NOTCH

! :

r-------------------------,

I I

I I

I I

I I

I I

I I

I I

I I

I I

:

_

WIRING

VClLT

240.

_________________________
L

I I

I I

I I

I I

I I

I I

I I

I I

I I

I