Dyna FM-3 Instructions Manual

.tJlYIVaCD

STEREOMATIC MULTIPLEX MODEL

FM-3

This

number tioned concerning

in

must

be

men-

all communications

this

equipment.

INSTRUCTIO·

ASSEMEiLV ALIGNMENT

OPERATION

S

FOR

tJlYI\IdCD

(/-

il\lc_

3060

JeffersDn

St

.•

Philadelphia,

Pa.19121

\

Price $1.00

929116

U.S.A•

CONTENTS

Operating Instruction!> 3 Technical Description

General Wiring Practice . . . . . . . . . . . . . . . . . . . . . . .

Assembly Instructions 7 Alignment Instructions 240 Volt Power Transformer 19

Case

In Service and Warranty How Parts Voltage Check Points 23

of Difficulty 20

to Make a Folded Dipole Antenna 22

list

....•..............•.....

................•........

..

16

21

22

SPECIFICATIONS

4

6

Useable

Signal-to-Noise

Harmonic

Frequency

Output

Discriminator

Peak

Dial

Calibration

Power

BASED

Sensitivity:

Distortion:

Response:

Capture

Selectivity:

Audio

AM

Suppression:

1M

Distortion:

Audio

Impedance:

Separation:

Antenna

Accuracy:

Consumption:

ON

IHf

4 30dbbelow

Ratio:

70 less

Drift:

less

±

Ratio:

5 54

Hum:

73dbbelow1volt greater

ADDITIONAL

less 100,000

Output:

2 less

Peak

to

grea

Input:

300nbalanced

0.2% 55

STANDARD

microvolts

for 100%

db@100%

than

0.25%@100%

than

0.03%

0.5

db10cpsto15

db

than63db

SPECIFICATIONS

than

0.5%

microvolts

volts@100%

than

5000

ohms

ter

than

900 KC

75nunbalanced

watts

T-l00

total

noise

modulation

KC

output

from

10

@

100%

modulation

and

distortion

modulation

microvolts

modulation

to

Useable

1MorHarmonic

STEREOPHONIC PERFORMANCE

Sensitivity:

Distortion:

3

less

db

less

than

mono

1%

(including19KC

residual)

Separation:

30

db

mode

and38KC

Your

FM-3 researched industry. been

devoted mind: present ance the

one,

stateofthe

level

home.

Side-by-side

with

tuners extent

to which specifications Dynatuner and

exceedingly

from

the

path

effects, its high interference, overmodulated abilitytomaintain

Dynatuner

and

field

tested

More

than

four

to this

one

performance

art;

canbeachieved

listening

several

times

these

cannot

in

low

distortion

powerful signals,

problemsofcross-modulation

orderofsuppressionofimpulse-type

its

exceptional

signals

full

signals.

These tuners this designs. an of of operation design. units aligned, home

The your properly in equipment, formed in aging, change

comparisons

built

and

that

representsafundamental

The

Dynatuner

adaptationofan

the

circuit

has

performance

and

simplicityofadjustment

The

net

result

which

and

require

which

alignment.

Dynatuner

home

as

in

aligned

this

manual.

with

the

laboratory,

after

tube

in

alignment,

aligned

existing

been

maxima

that

are

provides

the using This an

alignmentasaccurate

replacement,orafter

performance.

In

addition engineering sensitivity of

the

recovered

on

the

bestofaudio

to

reduce

to

the

objective

for fringe

audio

distortion

wastoproduceatuner

area

amplifiers.

of

whichisunquestionably

tuners

in amply

further formance. exact curately tuners modeltoproduction formity stability

fication department). posedbythe

availableatany

The

significant

terms

of reliability,

demonstrated

accomplished

In

component

defined.

are

which

of

There

has

race

advantagesofetched

no

other placement

Tbe

possible,

and kit,

etched

the

circuit

beennointenttoenter

(claims However, InstituteofHigh

is

oneofthe

componentsinthe

yearsofengineering

design which two,

with

cannot

assurance

and

maintained

comparisons

its

cost

demonstrate

goals

have

been

define

the

clear

receptionofboth

its

capacity

without

stereo

can

is a

separation

be

demonstrated

by

novice

fresh

distortion,

engineering

production

carefully

significantly

certain

investigatedinterms

and

of

the

surpassesonall

sectionsbepre-built

therefore

the

incapable

same

laboratory,

the

unique

ability

means

the

unit

adjustment

procedure

to

be

that

can

requirements,

reception,

signal

comparabletothat

The

all

types

has

oneofthe

price.

reproducibility

in

the

Dynatuner.

the

ultimate

tuner-kit

excellent

goalofimproved or

and

lead

specificationsofthe

guaranteeable,

becauseoftbe

circuits

provide,

configuration.

often

engineered

using

the

sensitivity

Fidelity,

THE

most

thoroughly

h.igh fidelity

effort

two specific goals

be

improvedatthe

that

this

by

the

of

the

Dynatuner

the

aChieved.

superiority

remarkable

and

to

with

constructors,

difference from

unit.

overall

required

top

asitcan

aligned

aiter

any

be

restored

with

concentration

producedatuner

very lowest

circuit

and

factory

layout

unit

extraordinary

and

the

s2nsitivity

by

this

Published

very

severe multi-

handle

and

its

the

using

anditis

concept,

Every

stability

of

complete

performance

always

detailed

without

as

canbeper-

shipping,

other

cause

the

with

sufficient

distortion

measured

distortion

construction

durability

Their

wired-bas

beensoacto

unit,

the

advertising

standards

tuner

FM·3

have

in

perform-

user

in

great

of

the

weak

freedom

severely

unique

weakest

Dyna-

other

not

portion

both

of

of a

kit

counts

and

in

be

later

test

after

for

to

peak

basic

levels

of effort

are

use

has

per-

Dyna-

lab

uni-

inherent

speci-

pro-

belongs

DYNATUNER

in

the

highly listenable sibly

higher

There

and

distortion

tuner

design.

The

design automatically tuner

as marginal fine a or

Operation

tunerascanbeobtained

specification claims.

Operationofyour refined costly which front

engineering

and

has

panel through their

objectivesbyautomation,

exceptional

The

functionofthe

also

controls itispossible,ifdesired,toturn for

example. is used.Itis equipment the

Dyna

the

Dynatuner

for

all

switching,

The

tuning

stationiscorrectly

to its

maximum.

tuning

on

the

eye,

tuning

overlap,

pointofcorrect tuning.

station and

signal will

maximum

The

strength

not

with

tuning

overlap apparent-there as

weak

widcly.

Normal between grid,

dependingonthe

Onceastationistuned,

will

indicate

in

stereo. flicker. are

the

STEREO

There

listeningtoa

lower

is

The

STEREOCATOR

whichisan sionally to

tum

off programming, indication. 19KCinrandom program

sensitive

receptionofmore

sensitivity

are

many

which

Some

parameters

are

requirements

to a

distinctly

well.

Extensive

conditions

of

'he

has

Controls

FM-3isremarkably

combines

complex

become a

FM

Dyna

adjustments

exhaustive

FM

engineering

reception.

power

the

AC

outletonthe

on

and

off

also

possible

which

has

additional

PAS

preamplifiersorSCA-35

power

switch

knobisusedtoselect

tuned,

Always

rather

than

dial.

The

butatany

lowest

signal

distortion,

separation

eye

will below 20 it.

The

is

no

"flat

as1fLv,

lit

center

division

but

these channel

and

particular

immediately

Betwecn

stations

canbeno

stereo

tuning

lighted

eye

above

first,

operates

there

this

integral

may

and

19KC

this

part

be

pilot

Noiseonextremely

noise)

material

may

class

and,

in

fact, will

stations

than

tuners

of osten-

rating.

in

addition

part

of a

completely

measurable;

for a

some

premium

superior

field

testing

proven

the

Dynatuner

today

the

performanceoffar

tuners

with

hallmark.

and

controls

research

freeing

switchisobvious.

rearofthe

both

simultaneouslyifno

when

using switching

to

sensitivity

satisfactory

are

intangible.

quality

factory

under

kit

assembled

adverse

to be

regardlessofprice

simple.

the

The

Its

operating

elimination

is possible

to

accomplish

the

listenertoenjoy

This

tunersothat

tuner

and

amplifier,

preamplifier

the

Dynatuner

facility,

amplifier, to

"ON",

and

use

the

amplifier

stations.

the

lower

tuning

tune

a station while watching the

tryingtosettoa precise

When

eye

will close

frequency

eyeisdesignedsothatitwill

strength,

At

this

of a

indicate

fLv,

precise

spot".Itwill

signals

3 divisions

the

upper

whetherornot

the

confusionasto

broadcastifyou

and

there will be a single

point

you

will receive

maximum

stcreo

maximum

yet

higher

signal.

signal

noise

closure

rejection

strengths

centerofchannelisalways

indicate

are

likelytofluctuate

indication

tuner,

STEREOCATOH

maybeanywhere

gap

on

the

and

signal

beam,

or

STEREOCATOR,

the

may

reference

strength.

broadcast

whetherornot

tune

for closure

then

observe

whetherornot

it.

from

the

19KC

pilot

of

all

instances

stereo

whereastation

broadcasts.

neglects

whenitrevertstomonophonic

will give

and

cause

youanerroneous

weak

signals

also

19KC

harmonicsintbe

some flickering

(thereissome

provide

lead

and

as

highly

more

ease

only

switcb

with

such

as

leave

the

never

the

with

signals

light

you

signal

Occa-

STEREO

of

the

of

a

is

or

of

3

STEREOCATOR

during

mono

reception,

but

consequence.

The

volume control matic/Mono Dynatuner when

tuned

to

mono

broadcasts.

It

may

rnatic feature,

operation enable

grams, broadcast. with

less

in

the

when

you respects tuner.

ous

way-the

tion

are

The

the

Dynatunertomatch

that

when

are

heardatcomparable

the

Dynatuner's clockwise basic

power Stereo trol for

Installation

There

The

socket

est

the

(outer)

switch.

will

to a

operation

The

occasionallybedesirabletodisable

and

by

pulling

youtomake

or

to

eliminate

Sometimesavery

background

mono mode.

are

reception

This

switch

sound

the

same.

volume controlisused

you

rotation

amplifier only,

35,

then

the

system.

are

two

marked

line

cord)

socket

shielded cables

length)

the

FM-AM)

Dynatuner

should

"Radio"

of

canbeconnectedtoany ohmsorhigher levels between

The

Dynatuner

basic

power

less

than connected and

the

amplifier which

2 volts for full

to

the

volume level wouldbeadjusted

switch stereo

tuned

switch

this

supplied

be

input

the

input

one

knob

actuatesapush-pull

When

normal

for this,

monophonic

The

the

to full

signal,

and

(through

position of

the

tuner

the

volume control

spurious

weak

interference

tuner

to a

stereo

knobispushed

separation

will

both

channels) this

can

recordings of

interference

station

by

will

still

broadcast,

willbeidenticaltoa

does

not

change

the

level, frequency response,

primarilytoset

thatofother

your

control

levels.

amplifier's

Normally

volume control will be

or

higher.Ifthe

tunerisused

suchasthe

operatesasa

audio

output

"A"onthe

is

the

is

the

right

(or

connected

(sometimes

control amplifier

conventional

socketsonthe

bottom

left

channel

similar

between

marked

type

or

audio

impedance

and

two volts.

can

also be

switched

output.

has

AC

which

connected

an

The

outlet

stereo

automatically

control

be lockedinmono

"OUT".

operating

indicate

purely

tunerinany

program

Dyna

plate

output. output.

up

these

preamplifier.

input

can

directlytoany

input

amplifier

on

the

with

volume control.

The

Dynatuner's

line

cord

should

be

plugged

AC receptacle furnishing 120 volts of 60 cycle

or

240 voltsat50or60 cycles

power

Antennas

politan

local

the

tionofthis ears" antennae

most

similartothat be

transformer).

Every

FM

area

station

flat wire

tuner

use, a

reception.

included

manual.

is

also

suitableiffully

should

favorable

The

normal

orientation

antenna

supplied

connectedtothe

requiresanantenna.

twin

with

The

be

rotated

two

lead

Instructions

television

lead-in wireis300

with

outermost

the

may

with

folded

kit

extended.

for

best

vary

the

kit.

the

PB-012

For

dipoleisadequate

for

making

are

givenina

type

knownas"rabbit

Either

reception,

with

different stations.

The

two

antenna

screw terminals,

this

is of

Stereo-

"IN",

operation

revert

on

is

the

Stereo-

This

stereo

onamono

can

be received

the

STEREO

butinother

monophonic

and

distor-

the

level of

sources, so

inputs,

in

this

usage,

operated

with a

Stereo70or

volume con-

Dynatuner.

(the

one The

The

to 25 feet

sockets

FM-MPX,

of 100,000

accept

sensitivity of

may

Dynatuner,

the

tuner's

into

current

optional

some metro-

one

later

of

and

ohm

twin

leads

should

no

the

mono

"IN".

will

pro-

tuner

obvi-

they

at

near-

"B"

two

in

and

or

The

signal

be

an

(120

for

from

sec-

these

their

lead,

leaving tion

areas,itis sometimes

for

the

using 75 cable to conductorofthe

(but

not

An

outdoor

one,

particularlyifreceptionisdesired

Stereo

reception is

comparable

available

the

"omni-directional"

should advise

to

tions

preferably be

youonthe

antenna

You

should

are

more effective attempts

sensitivity of

limiting

to

listen to

tuneriscoupled

Mounting

%

The some heat. coverasan thermal madeinthe heatisequivalent adequate mumofthree

tuner.

tuner

Never

is operating. amplifier, fier.

The

tuner

cannotbestacked

When consideration larlyifother are

alsointhe

larly

if

thatasmall

Dynatuner ventilation.

It

is

simple

l"

in

thickness. A

with

the

feet

are Dynaco C.O.D.s please.Ifit and

the

used

on

and

the

The

circuit described interestedinthe

The

FM-3

quence:

1.

A 6AQ8/ECC-85

the

center

terminal

antenna

ohm

the

lead-in.

The

coaxial cablebyconnecting

center

antenna

cabletoeitherofthe

both).

FM

antennaisalways

also

more

mono results.

for fringe

area

reception.

or

used

use of

these

manufacturers

realize

encountered,

results

to improve a

the

actiononvery

stations

that improving

than

tuner's

Dynatuner,

weak signals,

you

have

withaproperly

the

Dynatuner

Dynatuner,

Because

integral

environment,

like

the

part,

design for

all

tuner

the

and

this

to a 60

ventilationisrequired.

the

inches of

put

tuner

air

anything

When

stacked

mustbeinstalled

preamplifier does

above

mounting

the

Dynatuner

must

be giventoadequate

heat-producing

same

area.

In

the tuner

mustbemounted

circulating fan be used.

is void ifithas

to install

the

supporting bottom not

for $2, which

of a

used. A

13Y16"

PBK

takes

is desiredtomount

Dyna

PAS-3ina single

the·

tuner,

cutout

which is

shouldbemade

TECHNICAL DESCRIPTION

features which distinguish

only

in

somewhat

technology

has

the

following basic tube

cathode

coupled

dual

tuned

high frequency triode.

unconnected.Indifficult recep-

necessary

Dynatuner

screw

to use coaxial cable

has

provision for

the

shieldofthe

terminal,

outer

better

screw

and

the

thananindoor

center

terminals

over long distances.

critical of

High

gain

These

"non-directional"

with

a rotator.

antennae,oryou

for

detailed

antennae

antenna

are

preferable

arrays

Your

information.

type,

dealer

can

than

can

write

when difficult reception condi-

the

antenna

any

other

sensitivity.

coupled

with

may

not

received before, when

designed

electronic devices,

has

been designed

unit

in effect

adequate

normal

watt

allowance

temperature

light

bulb

There

above

and

on

top of

with

the

above

not

require ventilation.

the

Dyna

will have far

remedy,

The

its

exceptional

well

enable

including

extreme

antenna.

generates

with

creates

has

its

been

rise.

and,

therefore, should behind

the

be a mini-

the

case while

Dyna

PAS

the

preampli-

Dyna-

SCA-35 amplifier.

you this

own

preThe

inapanelorcabinet,

air

flow,

particu-

devices,

restricted space,

such

as

amplifiers,

and

particu-

face up, it is essential

The

warrantyonthe

been

abused

Dynatunerinany

shelf

x

3l~G"

bracket

the

cutout,

mounted

7

technical terms.

may

through

inadequate

panelupto

shouldbeinstalled

cutout,

and

the

kitisavailable from

placeofthe

the

above

J

0/16"

high by 13YJl' wide.

the

shelf.

the

Dynatuner

rubber feet

the

FM-3

Those

ignore this section.

and

circuit

R.F.

amplifier using a

flush

rubber

preamp,

can

not

are

to

but

the

Its

the

No are

be

se-

4

2.

An

oscillator-mixer

3.

version

Four

using

triode-pentode

I.F.

amplifier stages

two

6BA6

4.Asymmetrical semi-conductor

5. A

cathode

and

channels

6.

A feedback

low

follower providing

impedance

using

stage

with

pentodes

wide

band

diodes.

source to

one-half of a

audio

amplifier using

12AX7jECC-83.

7. A

19KC

amplifier

and

doubler

6BLBjECF-80.

8.

A

balanced

matched

9.

Stereo followers using a

10. A

11.

dual

as

a stereo indicator.

The

power

bridge

semi-conductor

audio

output

indicator

supply,

synchronous

diodes.

stages

12AX7

jECC-83.

EMM-801

which

rectifier.

The

Antenna

Circuit

Provisionismadetomatch

or

a 300

ohm

balanced

dating

The

was and input vent cross-modulation

The

feedback" stabilization an need

any

standard

R.f.

Stage

The

cathode

chosen

for

coupled the

low noise figures of

withatuneable

overloading from

and

Oscillator-Mixer

The

triode

sectionofthe

tuned

grid

and

oscillator

for

circuit

automatic

choice of

degradationofthe

The

oscillator is complete signal

pentode

tuning

sectionofthe

injected

isolation of

circuit

(changeinoscillator justed) adjustment also

antenna receivers

have

entire

The

reduces

Circuit

been

FM

I.f.

Phase

is

virtually

and

trackingofthe

re-radiationofthe

which

might

and

television sets.

constants

adjusted

band.

Amplifiers

shiftinan

transmission

antenna

array

dual

input

stage.Itcombines

the

commonly

input-a

strong

spurious

6AT8Aisused

oscillator

operating

with

sufficient

frequency control with

audio

signal.

into

the

oscillator

at

the frequencyasthe nonexistent,

cause

interferenceinother

of

the

oscillator

to give

and

FM

uniform

Limiters

signal

non-linearityordistortioninan

amplifier. Accordingly,

signed

Since

for

this

minimum

occurs

alignmentofthe

peak

tuning adjustment minimum

(tuning

for

phase

the

shift

the

phase

with

undercoupled

I.F.

section is

for

maximum

undercoupled

approach

I.F.

shift

usinga6AT8A

screen

with

and

injection.

progressive

two

6AU6

discriminator

the

multiplex

high

pentodes.

with

matched

isolation

and

12AX7jECC-83.

one-half

usingapentode-triode

consisting

actsasa

uses a

either

used

triode

R.F.

necessary

signals

detector

6V4jEZ-80

a 75

line,

for

used which

using

of feedback

tuning

eye

full wave

ohm

unbalanced

thus

accommo-

FM

reception.

amplifier

the

high gain

grounded

featuretopre-

might

responses.

in a

circuit.

Careful

temperature

parameters

result

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follower

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38KC

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the

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passed

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sec-

noise

good

with

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signal

each

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in to

as

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5

GENERAL

When

against

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you

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supplied.

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a screwdriver.Ifyou

with

care, especially when working because of its not

essential, a wire-cutting

considerably;

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solder

cOTU1ection:

1.

2.

3.

only

Make Heat Apply

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PRACTICE

identify

illustrated

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needapencil-type

have

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on

than

are

necessary

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involved

heat

stripping

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in

of techniqueissoldering,

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connection

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ALL

CORE

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(60%

Whenever

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two

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symbol

five

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pictorial diagrams.

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is

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the

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than

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is

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nection directlytothe illustration soonasthe

solder

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must

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on

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minutes

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and

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smooth

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board.

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and

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6

ASSEMBLY

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protectively

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are

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observe TIAL

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list.

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assembly

GOOD

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point-to-point

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INSTRUCTIONS

three

etched

then

mount

and

complete

boardsinthe

are

kit,

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contributes

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enable

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all of

topofthe

identification

the

holes

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color

stripe

with

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value

components

assembly

you

first

sort

them

of

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PERFORMANCE

wiring

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mounted,

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the

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storage

circuit

JOBISESSEN-

circuit

boards

whenitis

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for good

boards

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other

wiring.

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leads

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identified

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speed

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rack

boards,

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board

conducive

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for

OF

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l(

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Position youasin overanopen

leads

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places

each

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bring

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leadonto

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on

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the

color

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leads

resistors

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solder

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not

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R.F. CIRCUIT BOARD

etched

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when

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copper.

circuit

diagram.

boardinfront

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two

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resistors

board.

correct

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resistors

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lead

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flow

smoothly

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off

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leadtoform a bridge

project

hold

one

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installation

all

circuit.

PC-7

of

the

board

the through. in

their

the

leads

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hand

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work

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for

amount

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around

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to

is

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the

leadsofsome

prevent

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when

prevent

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insulation

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edgeofthe

the

boards

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CORRECT CONNECTION

NOTE

BODYOFRESISTORISPRESSED

TO

BOARD.

FROM

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CLOSETOSOLDER.

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enough

wire to be

making

flows from

the

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connectionstothe

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time.

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components

when

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reaches

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insulating

these

removed

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leads

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boards.

are

installed

contact,

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and

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area solder

SNIP

OFF

EXCESS

SOLDER

MAKE

SOLDER

both

the

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splashes

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board.

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copperonthe

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across

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soldered,ifall

that

partofthe

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on

chassis

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may

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will

of

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the

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confuse be used here.

(red-red-white-gray each excess.

3

(;;

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locationofthe

that each lab goes over on top of

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to ter

ground

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3.9

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on

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lead

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of

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resistors

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board

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the

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resistor

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is flush

components

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one

watt

10,000

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one

tubular

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its hole

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each

be

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should

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mounted

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ohm

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wall

resistors used

capacitor

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board,

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each

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leads

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not

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gently

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solder

off

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certain

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firmly

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in

7

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itor

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inverted

NOTE

CAPACITOR

TOUCHES

5

(I

BOARD.

)

Mount leadsatthe dicated. lets

#10

one

with top)ineyelets as

showninthe coil form is all six coil leads; deredtothe

to

the

pictorial

and

the

values

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touches

them

for soldering.

all the disc

certain

the

board.

from falling

BODY

DETAIL

the

oscillator coil bottom)inthe

The

two

heavier

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#11.

only two leadsatthe

#7

pictorial

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coil

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the

out

all leads.

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group

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Mount

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firmlytothe

#8.

eyelets

and

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bottom

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diagram.

to

the

CAPAC.lTOR

fJ

.

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the

parts

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individual

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are

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sureitis

See

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board

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copper

foil.

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capac-

board

four

in eye-

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pointsofthe

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to

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cator

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face

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outonthe

the

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Hold

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turn

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until

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tighten

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should

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the

capacitortothe

must

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the

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tension

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into

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hole

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temperature

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the

both

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transformer

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transformer

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place

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mounting

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a good connectionismade.

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capacitor

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firmly

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long-nosed pliers, while

board.

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and

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with

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the

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TlGHTlN WITH

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threaded

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spring

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the that

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holeinthe letsonthe scrape

if

solder,asthis is a

the

straps

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#2

purpose

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all

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this coilismountedonthe

the

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directionofthe

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bothtothe

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of this istoprevent

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coilL\into

board.

top of the board.

coil leads,orto ream

Be

each

Insert

Solder

eyeletisnot

very

board

the

have

been

certain

eyeletasthis will be diffi-

the

eyelets

the

It

snug

offsetinthe

diagram.

..

bottomofthe

solder

eyeletstothe

the

toothpick.

soldered

a good

two

#2

bottom

center two leadstothe

maybenecessary

the

perfectly

fit.

Insert

instrument

from filling

when

connection

heavy

and

#4.

of

the

slug

eyelets

ground

board.

copper (These

leads

Note

board,

with

slightly

free of

the

tube

into

you

is

of

the

eye-

to

ASSEMBLY

1(J)As before,

between two objects so below the boardasyou allofthe leadsasbefore. firmly solder all of

2(,j )

Insert Rll L8 excess leads.

3(j)Mount

V6.

socket.

and

Note

OF

THE

I.F.

CIRCUIT BOARD PC-8

support

one-half

against

the

one

R13,

L9.

Solder

the

four seven

the

Be

sure each pin penetrates the board

the

that

watt

resistors,

Be

sure

the

board.

leads.

Cut

watt

resistor R22,

and

the four

theseinplace

orientation of

board

on

the

insert

all

the

Tum

the

off

the

J

the

heater

sockets V3, V4, V5

the

does not bend over on top of the board.

that

each socket is

and

then

solder

of each socket.

4

(/;

Mount

the

nine

penetrates the board

of

the board.

and

the

center

5

(J)

Install

and

6

(J)

Install

of these capacitors

in

to cut

I)

Install

7(

oriented.

J)

Insert

8(

T4 catoratthe top of each transformerasshown in pictorial.

transformer. Avoid excessive solder, which

flow criminator transformer

9(

J)

Note

straps

these ground straps.

LO

(V)Install

necting the

capacitors C29

cut

off

the

all of

the

place,

but

be careful

adjacent

off

(all

hole

parts

the

excess.

PEC

555004, making sure

Solder

the

remaining I.F. transformers

432(01).

Solder

into

the transformer

the orientation of the offset in

and

install themineach

the

pilot light socket. Observe

tab

from

adjoining

backwards! Solder

ASSEMBLY

1(J)Insert

in as

OF

the

one-half

their

places on

before. Solder

seated

all seven pins

Seatitfirmly,

ground pin.

excess.

disc capacitors. As before, the leads

maybebent

of the circuit.

all three leads

Follow

both tabs

the

eyelet

both

THE

MULTIPLEX BOARD

watt

the

aU

firmly

and

socket V7.

and

does not bend over on top

and

C31. Solder all four leads

slightly to hold

that

no "bridges"

Solder

and

the

location of

and

all

and

damage it.

T5

will be

tube

socket

center

#20.

tabs.

resistors R71

board

after

leads

and

an

open

box

leads

may

project

componen ts.

after

bending

resistors

board

excess.

two

watt

chokes L6, L7,

and

flat side of

against

the

center

Be

sure each pin

solder all nine

all leads

thatitis correctly

cut

off the excess.

four lugsoneach

mounted

socket.

that

contact

are

trim

Make

the

are

T2,

the

Insert

their

seated

over

resistors

off

each

board

ground

pins

them

formed

T3

the

indi-

may

The

later.

ground

Solder

the

con-

goes

Do not install

PC-l

2

bending

cut

off

through

their

the

R93

leads

excess.

or

and

the

and

sure

and

the

dis-

into

it

(J)

Insert

2

on

NOTE:Itis

spacing.

3 (J)Insert

orientation of

each over

the socket.

either socket at this time.

4

(rviInstali

L71,

wedge is

inserted

off

v)

Mount

5(

careful

the indicator with torial.

against should and

6

(J;

Mount transformer firmly so tain

mounting

lugs

both

7(hMount

these identical

Solder

(J)

Note

8

straps

these ground straps.

9 (

J)

Observing detailE,mount D71 through D74. either one

(Disregard POLARITYISIMPORTANT. the odes. Diodes should be soldered carefully using the following technique: be manner sink." the the top of excess tom of

prevents damage to delicate diodes from excessive heat.

This

completes

boards.

Your

capacitors C71 through C84 in

the

board. Solder all leads

necessarytospread

the

two 9-pin sockets V71

the

flat

penetrates the board

on

topofthe

board

and

then

board.

solder all

sideofeach

and

the

leadsofC76tofit

Seat

each socket firmly

Do not solder the center ground

the

small wooden wedge

and

install L71 so

adjacent

into

the

excess.

the

to

the board.

transformers T71

orient

these correctly.

on

top

that

the

to C81 when

Solder

and

of the transformer coincides

the heavy dash on the board

These

snap

all

that

#2 mounting

all 6 leads

the

and

of those in

end

PC-12 board

bent

When

loop with a

heat,

FM-3

transformers

the

board,

into

place. Solder

four lugsoneach

transformer

canbemounted

thatitsnaps

all

5 connecting lugs,aswellasthe

tabs,

and

PEC-l

T73

penetrate

#3

as showninthe pictorial. Solder

tabs

and

units

and

orientation of

install

painted

up,

shown to provide a

the

themineach tube socket. Solder

Those

the

red, or

single green dotsorstripes.)

pointtothe

The

and

looped downinthe

soldering them, grasp

pair

board to absorb

and

solder from

board.

the

is now

This

assembly of

almost

must

and

the

transforme:.:.

(432(04) .

only one way.

into

position,

the

board.

the

other

PEC-2

(555001).

face in opposite directions.

cut

off

the

offset

each of

supplied

illustration,

marked

marked ends of

leads

should

"heat

of pliers from

the

technique

the

relatively

half completed.

their

places

cut

off the excess.

their

hole

and

V72.

Note

the

socket.

and

nine

under thick

the

choke leads

both leads

T72

Make

and

be

two mounting tabs

both

Note

three lugs.

excess.

in

the

may and

with three stripes.

The

any

bot-

the

etched

Be

sure

does not bend

pins

on each

on

the

choke

partofthe

are

and

cut

(432003). Be

certain that

with the pic-

seated

mounting

and

Do

arrowheads

firmly

tabs

that

this

Seat

make cer-

two

not solder

Note

that

the

ground

four diodes

look like

will have

DIODE

the

DETAIL

E

circuit

on

di-

to

it

9

1())

Install the

pictorial plated) essaryasthe

2(J)Install

of first, whichismounted flange proper washer

3 ( J)

Insert

hole. washer of lockwasher

4()Install

5(

j)

Install of each. lugsinthe

6()Install

mounting the

the chassis

7

(J

)

Install

inserted chassis,

in

the

chassis,

screws.

the

#4

hardware. of

orientationofthe

under

the

Note

fits

the

chassis.

the

chassis

Note

oneofthe

locationofthe pictorial.

with

the3rubber

into

and

the

dividing

CHASSIS

on-off

diagram.

three

the

fuse the

and

AC

two

pictorial.

flanges,inthe

switch

noting

between

the

two

the

Use

Lockwashers

holesinthe

screw

The

chassis.

each

nut.

holder

orientationofthe

Fasten

nut,

butdonot

outlet

audio

using

orientation

two

blank

The

socketismounted

setsof#4

the

line

other

partitioninthe

ASSEMBLY

inside

positionofthe

two

#4

and

switch

terminal

screws go

on

the

Refer

into

the

with

output

two

nine

grommets.

cord

two

to

lugs.

Secureitwith

the

shoulder

in

place

two

setsof#4

sockets

sets

of

the

centerofthe

space

between

hardware.

holeatthe

are

fitted

middleofthe

the

front

flange

lugsinthe

(smallest nuts are

threaded.

strip

through

outsideofthe

the

specialDshaped

lugs.

and

securely

tighten

on

# 4

ground

sockets

on

The

into

nickel-

are

not

with

two

the

pictorial

a lock-

The

rubber

the

outside

with

excessively.

hardware.

the

hardware

(short)

which

chassis.

the

pins

topofthe

larger

one

rearofthe

the

chassis.

inside

Note

holes

nec-

sets

strip

rear

for

its

for

have

of

in

is

II

12(

13

H(

15(

d)

(J)

Install

of

#4 C7 do is fed tabofTl. Be

certain

J)

Install

chassis.

Install

the

chassis

the

orientationinthe

)

Feed

all leads pictorial.

the

power between nine

lugs

in transformer ware

(the the

remaining chassis. tight,

and

that

all

~

Mount chassis. the

capacitor

blank)

pictorial

twisting

of

pliers.

WIRING

the

tuning

hardware.

not

touch

through

Solder that

the

LF.

Fasten

the

multiplex

using

the

power

through

Position

transformer

the

hole

tube

the

pictorial.

and

largest

three

Be

sure

recheck

components the

filter

Note

and

orient

diagram.

the

four

THE

FRONT

capacitor

Make

the

holeinPC-7

bothofthese

no

bare

circuit

with

eight

circuit

four

transformer

the

one-half the

for

the

socket.

the

terminal

size).

cornersofthe

all

transformer

all

are

capacitor

the

identifying

(semi-circle,

the

Fastenitrigidlyinposition

mounting

shield,

sure

that

capacitors C6

shield.

board

pictorial

other

PANEL

The

tabofthe

for

tabstothe

leads

contact

PC-8onthe

setsof#4

board

PC-12ontop

setsof#4

five

mounting

transformer

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Fasten Use

securelyinplace.

C32inthe

capacitor

hardware.

diagram. (PA-509orPB-012)

inch

holeasshown

lug

terminal

holeinthe

the

orientation

this

strip

#8

hardwaretofasten

transformertothe

mounting

hardwaretomake

marksateach

square,

according

lugs

1;4

turn

SUB-ASSEMBLY

using

three

the

mounting

the

shield.

topofthe

hardware.

Follow

strip

chassis

leads

and

corner

with

triangle,

of

#8

bolts

centerofthe

withapair

sets

and

shield

board.

of

in

over

the

of

the

hard-

are

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lug

of

and

to

the

by

8(

J )

Hold

the

I.F. pickupthe the

shaft careful per

and

If

these

to

get when insert tomofC1 topofPC-7.

aged.

the board. will

also

studs

9d)Mount

chassis,

Cl.

Install

washers

them.

10(-.1)Fasten

#4

(smallest

the

screws

washer

tighten

the

PC-7

transformer

tuning

points

that

youdonot aluminum are

the

tunertotrack

you

cometothe

the

small

into

This

fit is

tuning

capacitor

Twoofthe

engage

should

the

PC-7-C1

locatingitby

four

and

the

PC-7

from

under

the

nuts

boardasshowninthe

away

from

capacitor

away

colored

bent,

even

tabs

which

the

corresponding

Be

careful

especially

threaded

the

board.

seat

against

sets

of

nutsonthese

boardinplace

size

nickel

the

top,

each

nut.

on

the

C1,

from

you.

touch

the

platesofthe

slightly,itwillbedifficult

accurately

alignment

protrude

capacitor

snug,

is

fully

studsofthe

The

the

assembly

the

four

#6

(medium

studs

plated)

and

Tighten

capacitor

pictorial,

you,

and

carefully

holdingitso

Be

particularly

semicircular

capacitor.

across

procedure.

five holesinthe

C7 is

but

seated

shouldersofthese

board.

on

the

threaded

butdonot

with

hardware.

secure

these,

studs.

from

not

be

sure

against

capacitor

topofthe

size)

five

with

and

the

studs

tighten

sets

a lock-

with

that

cop-

dial

Now

bot-

dam-

that

the

lock-

Install

also

of

Unless stripped each

end

1())

2 ( J )

3 ( )

4(~)

5(

\.)

otherwise

from

each

priortoinstallation.

Mount flange)

hardware.

space

between

panel.

The

if

the

socketismounted

Strip

the

black

wire.

from

the

#3

Keep ing

socket

V8

control front torial

#3.

Position

bracket

Connect

(S).

Place

panel. diagram.

it

V8

the

specified,

length

the

tuning

on

the

Note

mounting

insulation

Remove

other

of

socket

clear

this

forV8and

one

endofan

(S).

one

endofan

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lockwasheronthe

assembly

Locate

of wire for a

eye

front

thatitis

pins

#1

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back

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the

Fasten

the

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socket

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the

and

#2.

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closetothe

81J2"

gr'

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the

connectitto

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the

red

green

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the

with

at

the

with

one

114"

1;2"

bare

pins

right-angle

front

wiretopin

shaftofthe

the

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nut.

should

mounting

sets

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topofthe

the

end

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of

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of

#4

blank

bracket

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volume

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the

pic-

at

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6(\)Cut

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Connect

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8 ('")

Connect the

9(.)

Connect the

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Connect the of

the

11 ( , )

Connect

control

12(V)Twist

green red wire to

13 (

i )

Connect switch

14 (:')

Connect the

15(.~)

Position

#4 twistittogether #1 wires willbesolderedtoeyeletsonPC-12

16 ( .J)

Cut together. lug other

This

completes

aside.

1

a 4

12"

black

lug

one

black

one

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/2"

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together

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control

red

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from

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one

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the

of

the

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the

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two

red

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Connect

#4

(S).

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wiretoswitch

the

wire.

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of

the

#4ofthe

wire to

of a 2

an

8"

cndofthe

Connect

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the

red

lug

#6ofthe

# 1

of

the

of a 5"

of a 4"

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with

the

wire

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lug

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volume

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control.

1

8

black

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8

12"

1

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#2

black

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of

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green wire to lug # 5 of

green

wiretolug

and

an

8"

wire to

the

corresponding

the

control

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wire from

lug

control.

switch.

Connect

switch.

red

wire

to lug # 1 of

green

wire to lug

black

wire from lug

the

switch

red

wire from

from

switch

6Y/,

endofone

long

lug

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wire to

corresponding

#5

(S).

sub-assembly.

and and

and

one

(S-3).

red

lug

#1

(S). #3

#3

and

Connect

the

bracket

switch #2.

later.

twist

switch

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feed

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#6

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wire.

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the

the the

green

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These

them

this

of

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Connect #2 leadisinserted Soldertothis sectionofthe

6

(J

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Connect to lug inserted

to

this

7

(i)

Twist

(PA-509) the the

NOTE:Ifyou

PB.OI2,

8

()

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the

to

10

C'

)

Connect

lug

C32.

symbol)ofthe

11

('. )

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socket

the

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the

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brown) capacitor symbol)ofthe

the

green

of

the

five lug

into

lower

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the

green-white

#3ofthe

into

point

lug

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the

on

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Connect

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u~in~

step

end

terminal

#4ofsocket

one

end

five

lug

terminal

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one

endofa

# 1 (semi-circle

COJU1ect

the

capacitor.

one

end

V9

(S).

Connect

filter

capacitor

one

endofthe

# 2 of

the

other

capacitor.

one

end

one

watt

C32.

Connect

capacitor.

power

terminal

the holeofthe

lug

lower

the

lug

two

Connect

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optional

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of a 1

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the

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holeofthe

only.

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later.

black

power

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the

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the

steps

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/2"

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Connect

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red

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lug

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transformer

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tor C32

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other

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resis-

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lead

J)

Connect

4(

of

the

to

ground

etched

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circuit

all

fourofthe

tuning

together transformer

socket

#7ofsocket

to

ground

one

five

lug

lugAon

CHASSIS

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tab

through

other

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three

points

board.

capacitor

the

V9

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the

and

PC-7

that

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the

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steel chassis,

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board.

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red

and

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Connect filter

black

Connect

capacitor

Feed

one

capacitor

and

first

tab

See

pictorial.

off

the

chassisatboth

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connecting

through

the

red-yellow

one

red

the

other

red

the

red-yellow

capacitor

wiretolug

the

C32

other

(S-2).

end

then

that

excess.

lugs

PC-7.

lead

C32.

# 3

end

Cl

The

following circuit to

the

boards.

correct layoutofthe allowance, of

numerals

Remember well-soldered the

to

eyelet, Connectingtoan firstbyheatingitwith ingofsoldertothe

of

14(I)Connect

on

(S).

to

15

(~

)

Connect

on

#13

16(J)Connect

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steps

Alwayshecertain

point.

circuit

may

and

that

board,

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eyeletsiscarefully

when

connection

and

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the

eyeletiseasierifthe

one

end

PC-7

(8).

Position

one

end

PC-7(S).

on

PC-8

one

on

PC-8

(S).

will

refertoeyelets

The

electrical

combined

solderingtoan

mustbemade

eyelettothe

the

iron

bared

end.

of a 3

Connect

this

wireasin

of a

6o/.t"

Connect

(S). end

ofa3"

(S).

Connect

that

requirements

with

unless

observed.

copperonthe

and

applyingalight

Y2"

green

the

other

the

green

the

other

green wire to

the

on

the

you

are

connecting

the

tight

the

relationship

eyelet,asmooth

from

the

wire to

wire is

wire to

"tinned"

eyelet endtoeyelet pictorial.

wiretoeyelet

end

to

other

endtoeyelet

etched of

the

space

board.

coat-

# 1 # 5

#6

eyelet

11

R 1 R 2

R 3 R 4

R 5 R 6'

R 7 R 8

PARTS

68

ohms

10,000

1

watt

10,000

1

watt

390

ohms

10,000 47,000

1

watt

1,000

1

watt

1,000

1

watt

All

ohms

5%

ohms

5%

ohms

ohms ohms ohms

LIST

resistors

unless

FOR

otherwise

112068

116103

116103 112391 112103

115473

115102

SCHEMATIC

are

1/2

watt

R 9

R

10

R

11

R

12

R1310,000 R1.100,000

R15330,000 R16220,000 R1762,000 R18100,000 R193.3

noted.

100,000 33

10,000

2

watt

100,000

2

watt

DIAGRAM

10%

ohms

ohms ohms ohms

ohms

megohms

PART

112104 112033

118103 112104

118103 112104 112334 112224 112623 112104

112335

ohms ohms ohms ohms ohms

NPO

112473 112104

112104 112102 112102 112104 112104 112474 112474

112474 112125

219450 225181 225181 244471

C 5

.OC

e 6

10

C 7

2.5

C 8

eel

e 9

.OC

C

10

.OC

C112.,

e

12

47 C1318 C14.O( e1547 C16.01 C1747 C18.01 C19.01 C2047

C21.0

R

20

100,000 100,000 47,000 47,000 3,900

ohms

62,000 62,000

1.2

megohms

390

ohms

8,200

12,000

100,000

100,000 330,000

1,000

500

ohm

5

watt

ohms

ohms ohms1w. ohms

ohms ohms

ohms

ohms ohms ohms

ohms

wirewound

R

21

R22

#

R

23

R

24

R

25

R

26

R

27

R

28

R

29

R

30

R

31

R

32

R

33

R

34

R

36

5% 5%

112104 112104 115473 112473 112392 113623

113623 112125 112391 112822 112123 112104 112104 112334 112102

120501

R

37

R

38

R

71

R72

R

73

R

74

R

75

R

76

R77

R

78

R

79

R

80 R R R

81 82 83

500

ohm

5

watt

470

ohm1watt

18,000 240

ohms

22,000 47,000

150,000

1.2

megohms

3.3

megohms

2,200 220,000 150,000 47,000 47,000 47,000

wirewound

ohms ohms

ohms

ohms ohms ohms ohms

120501 114472 112183 112241 112223 112473 112154 112125 112335

112222 112224 112154

112473 112473

112473

R

R R

R R R R

R

e

e 2 e 3 e 4

84

85

86 87

88

89 90

91

92

93 94

47,000

100,000 100,000 1,000

ohms

1,000

ohms

100,000 100,000

470.000 470,000 470,000

1.2

megohms

ganged capacitor

180

mmfd

180

mmfd

47

mmfd

ohms

ohms ohms

tuning

PC-8

RIO

PC-7

~

:~C14

R12

-

RI4

~

cn:;::~

:~R17

C19-;'

BLK

10\

)

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3

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C31

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555001

83pf

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I 2

I

SCHEMATIC

C

22

~7

mfd

nmld

j

mmld

amic

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Umfd

mmld mmfd }

mmfd

47

mfd

mmld

47

mfd

mmfd

47

mfd

•

mid

fd

~

d

NPO

N2200

trimmer

NPO NPO

NPO

225472 225100 240250 219010 225472

225472 240220 244471 225181 225472 244471

225472 244471 225472 225472 244471

244103

C

23

C

24

C

25

C

26

C

27

C

28

C

29

C

3D

C

31

C

32

C

33

C

34

C

35

C

36

C

37

.0047 .0047 47

mmld

47

mmfd

.01

mfd

.0047 .0047

.47

mid

27

mmfd

.22

mfd

40/40/20/20

@

350

.02

mfd

.0047 .0047 .0047 .0047

t

-----------6r------------------

-;..

.

=~

=:

C22

C23

"R23

r

mid mfd

mid mid

v.

mfd mid mfd mfd

NPO NPO

@

200

V.

mfd

225472 225472

244471 244471 244103 225472 225472 244474 244271

235224

296127 227203 225472 225472 225472 225472

C

38

C

39

C

71

C72

C

73

C

74

C

75

C

76

C77

C

78

C

79

C

80

C

81

C

82

C

83

C

84

180 180 500

220

.012 .0068 500

.001 .0033 .0015 .01

500

100

.1

mfd

.1

mfd

18

mmfd mmfd mmld mmfd

mfd

mmfd

mfd

mid mfd

mfd

mmfd mmfd

mmld

225181 225181 245501

245221 245123 246682 245501 245102

246332 246152 245103 245501 245101 246104 246104 245180

coil

slo·blo

PEe

sss

I 2 3

I

542541 542541 542541 542541

412001 423001 412003· 412004 423002 423002

423002 423002 423002

422530

004

D

71

1N541

D

72

IN541

D

73

1N541

D

74

1N541

l 1

antenna

3.9

lJ.h

choke

mixer

coil oscillator heater

choke

heater

choke

heater

choke

heater

choke

heater

choke

53

mh

choke

ampere

lamp-#47

R29

cOli

L 2

l 3

l 4

L 5

L 6 L 7 L 8

L 9

L

71

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T 3

T 4

T 5

T71

T72

T

73

r---1~-~7,..-

",_~C29

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IJ.

transformer

432001

IJ.

transformer

432001

IJ.

transformer

432001

IJ.

transformer

432001

Discriminator transformer

432002 19

K.C.

transformer

432003 19

K.C.

transformer

432003 38

K.C.

transformer

432004

R32

•

"R31

-

--

V 1

6AQ8/ECC85

V 2

6Al8A

V 3

6BA6

V 4

6BA6

V 5

6AU6/EF94

V 6

6AU6/EF94

V 7

12AX7/ECC83

V 8

EMM801

V 9

6V4/EZ80

V

71

6BL8/ECF80

V

72

12AX7/ECC83

volume

control-dual,

250,000

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switch

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each

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section pull

--

R33

~

TP

5 DD4

22~

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i

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LEFT

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A

PC-12

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RIGHT

OUTPUT

DIAGRAM

":"

--

17

(J

)

Connect

the

five

lug

grommet

#18

on

PC-8

18 ( 1)

19(J)

20

21 ( )

22(J)Connect

23(J)

24()Connect

25 (J>Connect

26(

27( )

28

29

30

31d)

32(~)

33

Connect

on

#24

Connect on and

terminal

(J

)

Connect on and

terminal

Connect

PC-7

PC-8

Connect the met on

filter

grommet

#27onPC-8

filter

#2

PC-8

J)

Connect the

eyelet

Connect

filter

the

eyelet

(J

)

Connect

on

to

(J

)

Connect

#40

\ wire to

(J

)

Connect

of

on Connect

on

#71 Connect

on

(long)

(~

)

Connect

on

(long)

PC-8

(S).

PC-8

connect

PC-8

connect

(8). (S).

(8).

filter

# 1

PC-8

capacitor

and

(8).

filter

#12ofPC-7

capacitor

transformer

#87

the

bottomofPC-8

eyelet

on

eyelet

PC-8

PC-12

PC-8

on

PC-12

lugofoutput

PC-12

lugofoutput

one

end

of a

terminal

#1,

and

connect

(S).

one

end

of a3"green wire to

(S).

Connect

one

end

of a 6

(S).

Feed

the

other

strip. one

end

of a

(S).

Feed

the

other

strip.

one

end

of a9"red

Connect

one

end

of a

Connect

one capacitor and

(8).

one

# 1

one

connect

one

capacitor

one

on

one

#38

one

PC-8

one (8).

(8).

one

(S).

one

(8).

one

(8).

the

end

of a 4

C32.

connect

end

of a7"red

C32

and

connect

(8).

endofan8"red

C32.

the

end

of a

endofa

C32

leads.

PC-12

end

of a 1

(8).

end

of a

(8).

#73

on

endofa6"green

Connect

end

of a4"green

Connect

(S).

end

of a2"green

Connect

end

of a

Connect

6"

green wire to

strip.

Feed

the

1

/2"

green wiretoeyelet

the

wire

endtolug

6"

green

the

wire

endtolug

the

other

4%"

red wiretoeyelet

other

endtoeyelet

1

14"

red wire to

Feed

the

other

(8-4).

Feed

C32.

(8).

(8-4).

Connect

Feed

the

other

end

5%"

red

Connect

7%"

red

Thread

Connect

(8).

1

12"

red wiretoeyelet

(8).

Connect

6%"

PC-12

the

other

the

other

socketA(8).

11;4"

green wire to

the

socketB(8).

other

lug

this

wire

through

other

endtoeyelet

eyelet

other

end

to

through

wiretoeyelet endtoeyelet

wiretolug

other

wire to

wire

black

the

(8).

other

grommet

#2ofthe

wiretoeyelet

grommet

#4ofthe

#21

lug

wire

through

endtoeyelet#22

#3ofthe

the

wire

endtoeyelet

lug#4of

through

to

wire to

the

wiretolug

the

other

wiretoeyelet

endtoeyelet

wiretoeyelet

endtothe

eyelet

lug

other

this

wire

other

the

wire to

endofthis

end

eyelet

grommet

other

to

# 2 of

# 19

eyelet

#20

#1

five

lug

# 35

#2

five

lug

#9

on

# 15

on

#16

on

(8).

#3

of

grom-

through

the

#34

on

#4

of

end

to

#4

of

under

end

# 36

end

eyelet

# 33 # 72

#39

eyelet

#81

center

# 85

center

34 (})Twist

35 (J)Cut

36CI)

37 (J)Cut

38 ( J)

39(J

40 (J)Place

41 (

to

42(J)Connect

43

44

45

wire.

the

frontofthe Connect terminal

of

the

two7"black wire to convenient front,

Connect

the

five

endtolug

two wire to convenient front,

Twist

the

front

the

black V71 copperonthe let

#74

pictorial.

)

Twist

rear of

as

showninthe output center solderedtothe eyelet

the

switchasshowninthe nect on-off switch.

tortolug

J)

Twist wire so

through endstolug the

corresponding

of

the

of

the

Connect

the

of

the

# 1 of

(J

)

8tripa1"

eyelet

lug

#2ofthe

(J

)

Connect antenna minal

( )

Connect L-ltothe

arrangement

lugs

together

Thread

five

and

together

(8).

together

ground

the

one

together

longer

AC

strip

# 1

these

the

black

strip.

lug

# 3 of

wire

one

endofa

lug

terminal

#4ofthe

7"

green

lug

#4

wire

one

sideofthe

wire to Be

sure

board.

(8).

the

five

socket

#83

(8).

bodyofthe

lead

Connect

#2

that

one

grommet

#1ofthe

on-off switch

wiretolug#2of

the

other

five

lug

one

end

outlet

the

fuse holder.

piece

# 3 of

the

coil

(8-2).

the

screw

and

wire from

PC-7

three-screw

twisted

L-ltolug

in

#3.

an

8"

black

wire

wires

through

chassis,

Connect

terminal

placement,

from

of

placement,

from

the

Position

the

lug

pictorial,

A.

pinofsocket

board.

of

a

pairofendsiseven.

terminal

(8).

of wire bare.

terminal

the

and

wire to

the

strip.

wires.

Connect

the

five

the

rearofthe

1%"

strip

terminal

wires.

the

10"

#2

endofthe

of a

the

five lug

the

rearofthe

black

five

lug

center

the

center

Connect

the

black

terminal Connect

Connect

.02

capacitor the

switch.

black wire and

on-off

(8-2).

strip.

1%"

Connect

(S).

wire from

#2

each

pictorial

Connect

and

Connect

nearest

through

lug

green wiretolug

lug

insert

green wire to

(S-4).

insert

terminal

ground

pinissolderedtothe

the

wiresasshowninthe

and

strip.

under

the V72

mfd

pictorial

other

connect

switch

other

Connect

shorter

black

terminal

of

sideofthe

diagram.

and

an8"green

the

small

slot

grommet

#3

of

the

five

one

endofeach

terminal

one

Connect

strip.

terminal

one

the

green

green wiretoeye-

green wires from

Position the

black wire

(8).

the

disc

to

leadofthe

anda6%"

the

Connect

the

it.

strip.

wire from

lug

(8-5).

lug

the

one

endofeach

strip.

wire from

lug

(8-5).

wires from

strip.

Connect

pinofsocket

the

green

wire to

to

Be

sure

green

wire to

capacitor

diagram.

lug

# 1 of

capaci-

Feed

the

oneofthe

(8-2).

wiretolug

AC

wiretolug

other

strip.

three-screw ter-

Follow

Connect

the

other

outlet

wiretolug

endtolug

one

end

other

end

center

of

antenna

the

Solder

#2.

lug

#4

For

the

#2

other

For

the

wires

the

it

under

Con-

the

black

pair

even

#2

end

(8-2).

# 5

#1

the

coil

wire

both

in

of

is

to to

14

46(J)

Connect

(8)

to close to circuitry.

47(~'

)

Connect the

top

first,

and

let

is heal,ed

48(J)Connect

on

the

a1"bare

eyeletB(S).

tJw

board,

one

end

of a3"red wire to

of

PC-8

(S).

then

insert

(rom

one

end

of a 2V2" rcd wire to

top

of

PC8

wire from

This

jumper

butitmust

"Tin"

the

wire

{rom

below,

(S),

eyelet

should

not

touch ;'ldjacent

eyelet

the

wire

aboveasthe

#23

on

b<'

with

eyelet

PC-8

#30

solder

k<,pt

on

eye-

#2B

(.A

62

Connect volume

tity

the chassis chassis.

63(,)Twist

#4

of the controL on

top

I wire to

the

short

controltoeyelet

of

solder

copper

sideofthe

to

make

togeth<'f

of

the

control

of

the

cyt'let#SO

black

wire from lug # 1 of

# 37 on

shouldbeapplied

a good

the

and

Connect

PC-12

bO:lrd,

remammg

boa

(S).

and

ground

the

green wire from lug

the

black wire to

I'd

(S).

the

PC-S

(S),

A quan-

to ey<'!et

flowed over to

contact

#37

to thl'

on

the

black wire from lug

#5

eycJd

#S'l

Connl'ct

the

greeIl

49

(,j)

Connect

on

the

50(

,J)

Slide tuning first,

and

shaft,Besure

of

the

51

(-,/) Te'lllporal'ily

from

the

52(,)

Position

the

frontofthe

twisted

slotinthe

#4

of

of VS

53 (~)

Thrcnd

#7

of VS

chassis

54 (~Mount

setsof#4

55(

>.5

Connect

to

cyeld

56(!)Connect

of

socket through fiat

against

57(

'I)

Connect of

V8

58(,')Position

VS

mounting

(S).

VS

59( -,)

Connect

PC-S

of bottomofthe

60(J)Conneot

eyelet

61 ( )

Slide

shaft, positioning

tighten

on

PC-S,

one

lop

of

the

tuning

capacitor

its

flat.

front

the

pair

chassis,

V8

(8),

(S).

the

through

and

through

the

hardware.

the

#25

the

VS

the

(8).

the

on~

on

the

A of

PC-Stothe

the

%"

and

mount

the

%" nut.

red

front

the

end

of a 3"

PC-S

dial

shaft,

flat

side

the

discispushedonto

dl~mount

panel

front

chassis.

(,S),

indicator

The

engages

the' volume'

and

panel

Take

gn'l'n

setitto

sub-assemhly

of wire'S which

Connect

and

the

gn'l~n

small

grommet

panel to

black

wire from

on

top

of

PC-8

red wire from

(S),

Access to

front

panel

cutout.

board,

red

gre~n

bracket,

end

topofthe

and

wire from

and

of a

1112"

board.

other

endofthe

topofeyeletAon

lockwasher

the

assembly

lugsasin

Be

carefulofthe

wire to

disc

hub

goes on

the

flat

control

one

the

green

protrude

th('

black

green

wiretopin

wires from

slotinthe

#2.

the

chassis

#3

(S).

eyelet

#30

#2

Position

overtothe

l~yelet

#2Stopin

eyelet

connectitto

green wire to

80lderitfrom

1

12"

green wire from

on

the

volume

on

the

pictorial,

eyelet

fully

onto

the

#2G

shaft

portionofthe

the

full

depth

assembly

sid(',

adjacent

and

black

from

the

sm:lll

wire to

pins

#6

and

frontofthe

usmg

three

of

socket

to

canbegained

this

wire

front

panel.

#26

under

#9

eyelet

PC-7

(S).

control

front

panel,

but

do

disc

capacitors

the

#5

V8

#2

#8

the

not

of

64 (" )

65

(I)

to

66(v)Thread

67(J)Observe the

68(J)Mount

A

69 (

t/)

Take

the

are

connected

Connect

the

rpd wire to

black

and

from

the diagram, them

clearofthe

I

Take wires from sembly,

(S).

Connect

through

On

the

to

lugs catedinthe lug

and board. lugs

positioned

the

red

wire

may

wire

does

through let

#79 eyelet

but

the

procedure.

This

transfornH'r has five mounting sition.

mounting

use

excessivp

much

solder, which

and

damage

Insert

in

the inches. the

line

the

grommet.

cord

downtothe

to

lug other

strip

(S-2).

pair,

of

positioned

red

and

black

to lugs # 1

the

black wire to

eyelet

green-black

prec~ding

around

step

V71,

board.

the

black,

and

the

red

the

switch

connect

the

green

red

wire to

twisted

slotinthe

pairofred wires from

undersideofthe #2

and

#3ofthe

diagram.

solderitto

Note

that

the

this

around

wires

are

solderedtothe

connecttoeither

not

contact red

and

grommet

on

#75

extra

the

#2. PC-12 (8).

(8).

This

length

discriminator

tabs,Itcan

Pressitfirmly to

tabs

and

the

heat

on

could

it.

the

endofthe

rearofthe

Tie

cord

chassis

a Imot 4

back

Split

so the

knot.

# 1 of

lead

to Now

which

away

the

fuse

lug

#5

checktosee

one

wire

from PC-12.

twisted

#86

pairsofleads

and

on

the

eyelet

chassis

board,

Wrap

lug

transformer

the

adjacent

the

Connect

gwen

is used in

pair

and

#2

eyelet

exactly

black

wire to

(S).

away

green

the

#76

# 84

Position

as

from 1'73.

twisted

volume

wire to

eyelet

(S),

adjacenttoPEC-I.

connect

transformer

each

wire

and

to

the

has5connecting

access hole.

proper

lug.

Be

circuit

green wires

the

red wire to eye-

th0.

wire

may

transformer

connecting

of wires which

of

the

(8).

from shown in

control

eyelet

these wires

T73,

around

copperonthe

Be

points.

sure

points.

protruding

gr0.cn wire to

appear

the

T5

lugs

be mount(,d in only

the

board

and

solder

five connl:cting lugs. Do

the

five lugs. Avoid

line

cord

inches

that

two

Connect

holder

of

flow into

and

from

the conductors

the

connects

through

pull

through

the

knot

oneofthe

(S-2).

five

that

the

transformer

grommet

end,

seats

of

Connect

lug

black

to

lug

control. Connect the

rcd-

this

and

the

Keep

group

as-

#77

# 78

(S).

the

switch

as indi-

the

sure

that

Either

that

bare

long,

alignment

(432002).

and

two

one

po-

both

not

using

too

#3

about

and

pull

against

the

line

two

leads

the

terminal

twisted

#5,

of

6

is

15

This

completes

should

that tion proper

now

all

connections

can

upset

aHgmnent. clippings.or of

solder

across

Checktobe

tuner

agrees closely

the

photographs. gerated the

lamp

that

and

the use

for

photographs

Insert

the

and

the

ground

the

shield.

smaller

shields.

There

are

clarity,

the

which will be the

front

panel.

wiseatthis

and

below screws enable

the

part

much

installed.

Remove tion. plate the

the

Insert

cutout

bottom.

panelsothat

I

plates. tighten screws above control knob

large of

plate

and

plate.

sheet

Install

it.

shaft with knobonthe

both

knobs.

Install

by

inserting

secure

Secure

metal

Now

the

each

slides between

plate.

Care

for

the

gold

undue

abuse.

Now

plug

only)

and

turniton. Allowitto

more

to allow

to

stabilize before

time

you

should

stations.

The

Dynatunerisuniqueinits

Every

stage asanindicating ciseascanbeaccomplished with

tory

equipment. accuracy exclusive, circuit

without

and

surpasses

the

assemblyofyour

make

one

final

inspectionofthe

are

soldered.

the

performanceofyour

Be

sure

that

pieces of solder,

insulated

sure

that

with

The

but

any

areofno

tubes

into

fuse.

Install

strapofeach

The

larger

ones on

the7pin

two small

usedtosecure

To

avoid

pointtocut

tuning

of

the

way,

easier

%"

the

from

Place

the

insertion

nut

rectangular

the

rear. the plastic

%"

nutonthe

install

and

below

and

areasofthe

the

position of

the

pictorial

diagrams

discrepancies

consequence.

their

sockets

the

socket slips between

shieldsgoon

brass-plated

the

scratching

their

threads

capacitor

and

holding

plastic

The

front

plate

insertisheld

the

two

the

tuning

the

fully counter-clockwise

pointeratthe

tuning

rubber

feetinthe

7 o'clock position.

shaft,

a # 6 screwinthe

with a

the

screws.

the

steel

should

anodized

the

Dynatuner

the

tubes

ALIGNING

can

be aligned using

instrument,

The

external

the

thatofany

nut

on

bottom

The

plate

flange on

front

panel

be exercised when

panel

and

in

to age

and

proceeding

be

abletoenjoy

with

YOUR

and

ability

indicating

to

test

equipmentisa

accuracyofthe

comparable

Dynatuner.

unit

One

poor

solder

connec-

tuner,orprevent

there

are

no

loose wire

that

there

arenobridges

circuit

diagrams

must

sometimes be exag-

and

tube

shields,

boards.

the

wiresinyour

between

install

making

and

them

the

the9pin

tubes. V8

and

tubes,

V9

self-tapping screws

aluminum

the

shaft

removing them.

when

into

by

the

front

the

holes above

inserting

front

plate

plate,itis

This

plate

volume controlinposi-

insert

into

the

top

edgeisnarrower

against

volume control

small

shaft.

and

the

between

brass

Rotate

install

steel

the

shaft

self-tapping

the

Install

and

tighten

comer

the

insideofthe

and

the

and

knobs will

(to

operate

for

alignment.

the

holes of recess of

cover

with

frontofthe

the

aluminum

handling

not

AC

current

for

operating

set

the

each

the

withstand

an

hour

conditions

During

reception from local

DYNATUNER

simpHcity of alignment.

the

dual

beam

tuning

this

alignmentisas

the

most

complex labora-

achieve

this

measure

Dynatuner

tuning

meter

system.

You

to see

with

and

dial

sure

tube

and

do

not

these

will

front

than

front

two

and

volume

small

the

screws

bottom

foot,

bottom

four

cover

front

unit,

sources

or

this

eye

pre-

eye

It

is

important

has

been carefully followed,itis on this rigorous

alignment,

performance

to

emphasize

and

serviceman who works on this

procedure,

"sweep"

and

that

alignment

he is also advised

techniques are not considered either

satisfactory or desirable.

It

should dependent orapoor

be

on a

solder

understood

properly

connection pletion of some steps, or the

extent

that

additional requiredtoreestablish realignment. preset

the

I.F.

multiplex

PC-7

board.

to

The ment. cise

alignment

ing with alignment,

be made, which will

ing A ment

the

similar

following

is

On

ment

two holes in adjusts stage.

The

topofthe screws

The

Certain

close to

the

parts

proper

transformers,

cover

and

bottom

complete

stabilityofthe

without

three

permit

hourofoperation

aging period

any

tube

tuning

(trimmer

the

topofthe

the

mixer,

and

approximate settings given in

below have already been

to you.

1()Turninthe

tion

untilitis in

butdonot

screw

force it.

clockwise.

2( )

Turninthe

screw C1-B

untilitisinfully.

off %

turn

counter-clockwise.

3( )

The

oscillator

trimmer sible from below the

headofthe

Withanantenna toanamplifier lamp

should

in

each

tube, this tuning

ing

eye

should

take

knob, some deflection of

shouldbeapparent

and

light,

and

attached,

a speaker,

and

then

only

about

quencies of local stations.Athigher control,itshould

stations

effects

and

cannotbeobtained,

Difficulty" before

sound

attempting

be possible to

from the

align it.

Two

tools

are

necessary for

of

screwdriver

(supplied)

the

tuning

transformers.

with

an

insulated

which

has

slugsinthe

Only

the plastic tool

that

when

this

procedure

not

possibleto"improve"

the

Dynatuner

standards.

that

constructed

could

test

the

proper

of

operating

the

discriminator

and

the

plate

tuner

cause

equipment

the

must

will

meet

the

It

is essential

that

be informedofthis

that

conventional

successful

alignment

tuner. A wiring

prevent

satisfactory

erroneous

settings to

might

operating

Dynatuner

point.

conditions for

have been

These

transformer, the

slug-tuned

coils on

be removed for align-

Dynatuner

allows pre-

then be

include

special shielding. Before proceed-

approximate

reception of local

while

should

be allowed before realign-

replacementonPC-7

capacitor

capacitors)

shield.

the

rear

screw CI-B

made

as

C1-Donthe

all

the

Then

backitoff14turn

on

butdonot

capacitor

the

chassis)

screw is

%('

and

turn

there

should

the

tuning

15 seconds.

the

as

the

stronger

refer to

to use

alignment:

handle,

a hexagonal

LF.,

discriminator

adjustments

should

stations

tube

conditions stabilize.

and

PC-8.

Cl

there

are

two

adjust-

accessible

The

center

the

capacitorissupplied

center

through

screw (C1-D)

adjusts

steps

# 1

(mixer)

the

and

way.Itshould be snug,

counter-

the

rear

(R.F.)

force it.

C8

section

Then

back

screw (acces-

shouldbeturned

from

the

triangular

with

the

tuner

connected

the

tuner

on.

The

be a

slight

glow visible

eye

should

lower beam of

tuning settingsofthe

hear

some hiss between

stations.Ifall

the

section

the

When

passes

tuner

a small

glow. All of

turning

the

volume

of these

"In

Case

furtherorto

tipped

andaplastic

end

for

adjustment

and

multiplex

shouldbeusedtoadjust

most

any

is

error

com-

the

dur-

the

R.F.

#2

sec-

it

until

nut.

dial

the

tun-

fre-

of

tool

of

16

these

transformers.

age

the

tuning

former.

be

inserting

ING

ARD

pletely general amplifier as

First,

and

knob its and

When

made

using

the

BE

CAREFUL

ALIGNMENT.

BECAUSE

It

is suggested

before proceeding, to familiarize

procedure.

and

for

normal

The

alignmentofthe

the

main

then

the

"OUT"

to disable

effects during

the front end.

tions will refer to where ing

Dyna's

the

precise peaks.

Alignmentofthe

These

alignment

I.F.

adjustments

tool

transformers, areina position, easily rect

alignment.Ifthe not

be necessarytomake

reach

the

right

THAN

ONE

FULL

ING

FOR

SOME

SHOULD

always stops

TO

each

STOPTOCHECK

The

endofthe

be used,

it.

IF

THE

FORCEITBEYOND

I.F.

transformer, slugs have been other.Ifan

are

likely

attemptismadetoturn

to

Any

other

typeofinstrument

slugs, requiring

using

the

plastic

the

end

which

replacementofthe

tool,

all

adjustments

hasashouldertoprevent

tool too far.

IN

HANDLING

THERE

OF

THE

that

you

THE

IS

SOME

EXPOSED

read

these

CHASSIS

instructions

yourself

The

tuner

is

to

be

connected

speaker,

turned

on,

and

the

antenna

use.

tuner

portion

multiplex

FM-3iscarried

(PC-7

section.

the

Pull

multiplex

and

the

circuit

out

PC-8)

alignmentofthe I.F. stages, discriminator,

For

these sections,

the

lower

(tuning

the

alignment

eye)

exclusive reference grid will simplify locat-

I.f.

Stages

require

into

the

threaded

and

the

tuner

point.

IFASLUG

TURN,

YOU

FAULTINWIRING

BEFORE

alignment

with

the

CORE

SLUG

THIS

anditis possible,

turned

break,

requiring

the

insertion of

slugs

rotationofthese

determined,

has

been

more

thanasmall

MUST

WILL

PROBABLYBECOMPENSAT-

OR

COMPONENTS,

PROCEEDING

tool

with

tool

inserted

STOPS

TURNING,

POINT.

There

too much, for

them

replacement

inside

which

built

BE

the

until

are

particularlyifthe

themtotouch

further,

transformer.

Two

points

require special

instrument

or supplied

may

break

the

chassis

mind

the hazardofpossible shock from exposed wiring.

you

wish,

mentofthe

4(\)Turn

no

end LF. the

As

to turn the slugs except

or one

the with

the

bottom

LF.

the

station

of

exactly

slug.

When

the

tuner

stages.

tuning

canbeheard

the

plastic

transformer

hissing is loudest.

this

and

the will become louder, become

becomes

sharper

annoyingly volume control; will after rather

usually

the

begin to close

first

than

the

steportwo,

attention.

like

it. A conventional

working from the·

on,

you

plate

canbeinstalled

knob

until

(only

alignment

T4,

and

slowly

following

and

easier to locate.

loud,

the

lower

sound, for

Never

the

must

constantly

you

find a

hissing).

tool

rotate

steps

proceed,

the

loudness

adjust

halfofthe

as

the

and

this

the

remainder

adjustments.

will

dam-

trans-

are

DUR-

SHOCK

HAZ-

WIRING.

com-

with

the

to

attached

in two stages.

is aligned,

volume

and

control

eliminate

instruc-

beamofV8,

the

plastic

the

aluminum

slugs

until

they

represents

cor-

correctly,itwill

adjustment

TURNED

FURTHER.

shoulder

the

DO

NOT

MORE

AND

YOU

should

shoulder

ATTEMPT

two slugs

each

the

slugs

of

the

entire

use

any

tool

alignment

metal

tool

underside

bear in

during

into

the

level

eye

place

Insert

the

slug

the

peak

If

align-

where

top of

hissing

the

with

tube

the

until

will hiss

the

noise increases

should

be used,

of

the

to

5( )

t

6( )

an

7

(J>

8(J)Adjust

9 (1>Adjust

10 (V)Adjust

11 (

\Jf

Alignment

The tortion critical

methodofadjusting

point. 12

<.

J)

to

in

13(J)

of

If

V8

If

it

is difficult to

lack

of hiss, use a

justments.

Then

make

the

stationtomake

repeat the procedure while

between stations, using hiss

until

there is sufficient deflection of

lowel'

bar

to use

thisasan

the

sequence described. Adjust Adjust

Adjust

alignmentofthe

and

Tuneastation

signal

Ideally,itshould

powerful signal, adjacent as

sure

atypical

on do steps.

eye

Unscrew discriminator endofthe

the

This

criminator

the doneinthe as

ittoanother

it

If

sary

without

MUST SIBLE

Care

but,ifyou

tuner turniton

do this,itis essential

warmupfor a few

an

the

of

bottom

the

top slug of

the

bottom top slug of

the

bottom

the

top slug of

the

bottom

the

slug of

T3.

slug

of T3.

T2.

slug of

Tl.

slug of

Discriminator

T4.

T2.

Tl.

discriminator

noise rejection of

adjustment.

The the

the

Dynatuner

discriminatortoexactly

which gives a good

clearly

indicated

not

by

be a

anditshould

you

against

channel

tune

signal.

stationsbynormal through imperfect

it.

These

alignment

The

accuracyofalignment

the correctnessofthis tuning.

not

disturb

While

will be used to show

the

they

tuned

are

setting

being

other

(counter-clockwise)

transformer

plastic

slugisflush with

detunes

transformer,

optimum

indicator

alignment

the

secondary

adjustment

few steps.

for

this

partofthe

the

essential in

adjustment,

circuit

is now connected.

you

are very careful,

unsoldering

turning

BEAR

IN

SHOCK

and

deliberation

it

is possibletodo

and

resoldering of connections

off

the

MIND

THE

FROM

can

wish to avoid all risk of shock,

off before

again

making

to

make

the

that

minutes

adjustment,

even ifithas

a minute.

NOTE:Ita considerably low. megohm capacity

VTVMIsavailable.

simplified

The

VTVM resistorintheDCprobetoIsolate from

the

by

shouldbeofatype

measured

discriminator

skipping

circuit.

adjustment

this

series of ad-

because

tuned

as

an

audible

the

tuning

signal

eye

indication. Always follow

tuner,

determines

and

the

dis-

is therefore a

provides a positive

the

right

a definite

very

weak

be

interstation

precautions

through

clean

tuning

separated

mono

peak.

oravery

from

hiss

will in-

using

an

depends

Be

during

performed

sure that

the

you

following

tuning

effects. the

top

T5,

using

tool,

top of

winding of

slug of

tl1e

until

the

transformer.

the

shoulder

top

the

dis-

ordertoobtain

of

the

primary

The

tuning

than

tuner. However,

HAZARD

EXPOSED

eliminate

new connections,

the

adjustments.Ifyou

you

allow

each

time before

been off for less

Immediately10step24be-

which

the

winding,

eye

is used

by

connecting

that

to which

the

OF

WIRING.

this

hazard,

turn

the

tuner

making

alignment

hasatleast

probe

and

neces-

YOU POS-

the

and

than

can

a 1

lead

of

to

be

17

14 ( >

15(v)Temporarily

16(viAdjust

17

18(/)Solder

19(v)Tum

20(V)Touch

21

22 (!)Re-connect

23 ( J)

24 ( )

Unsolder nects

from

let

# 32onPC-8.

the

of

the

eye.

(,v)

Unsolder #32

which bringsitclosetothe

ground that or

outward),

transformer

nately

from actual

the deflection cise as

the

#31.

of

the

sequence,

mizes

when

#31.

(j

Remove

and

eyeletB.Keepitreasonably Remove

socket V7.

THIS

VTVM

ARE

14

THROUGH

Switch

about

to

the Adjust reading Switch shorting

to

bring mid-scale which center-scale zero if meter sis

this

4 to 5

fully

To

the

and

temporarily

a 2" piece of

of socket V7,

the

top

the

there

touching

the

center

adjustmentofthe

wire is not

point

wire is

There

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SPECIAL INSTRUCTIONS FOR

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front

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LIST

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WATT RESISTORS

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brown-gray-orange

red-yellow-brown red-red-orange yellow-violet-orange hrown-green-yellow brown-red-green orange-orange-green red-red-red

red-red-yellow brown-green-yellow yellow-violet·orange yellow-violet-orange yellow-violet-orange yellow-violet-orange brown·

black-yellow brown-black-yellow brown-black-red brown-black-red brown·hlack-yellow

hrown-black-yellow yellow-violet-yellow yellow-violet·

yellow-violet·yellow

L

71

T

71

T

72

T 73

PECor PEC-2

shields

circuit

board

yellow

INDUCTORS

53mhchoke

transformer transformer t.ransformer

circuit circuit

module

1

wooden

board

module

wedge

#432003 #432003 #432004

#55.5001 #555001

for

L71

C82

I

T

•

81

11

OBI

-181-

----1185-

---t81-

~

so~

o

~

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U

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10

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Lxm

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81

I

i

14

15

•

820

~B6

~

LXVZl

°1

640

9

If,

100,000

J R

4 R 10 33

JR

12

100,000

JR

14 100,000

JR

15

J R 16

.\

lR

JR 19

iR

\ R 23

~

J R 25

JR 26

'\

~

JR

j R

~

J R 33 330,000

J R 34

330,000

220,000

R 17 62,000

100,000

18

3.3

megohms

100,000

20

R

21

100,000

47,000

R 24

R 27 R 28

R 30 12,000

R 32

29 31

3,900 62,000 62,000

megohms

1.2 390

8.200

100,000 100,000

1,000

WATT

RESISTORS 1

ohms ohms ohms ohms ohms ohms ohms ohms

ohms ohms ohms ohms ohms ohms

ohms ohms ohms ohms ohms ohms ohms

brown-black-yellow orange-orange-black brown-black-yellow brown

-black-yellow orange-orangered-red

-yellow blue-red-orange brown-black-yellow

orange-orange-green brown-black-yellow brown-black-yellow yellow-violet-orange orange-white-red blue-red-orange blue-red-orange

brown-red-green orange-whi gray-red-red brown-red-orange brown-black-yellow brown-black-yellow orange-orange-yellow

brown-black-red

yellow

te-brown

JL

JR

)R /R

JL

T T 3 T T 5

4 7

1 9 5 1

PEe

PARTS LIST

22

47,000

10,000

11

10,000

13

6

heater

7

heater

8

heater heater

9 2

I.F. I.F.

4

I.F. Discriminator

socket

socket ground pilot

lamp

circuit

WATT

ohms

2

WATT

ohms ohms

INDUCTORS

choke choke choke

choke transformer transformer transformer

SOCKETS

for

etched

for

etched

straps

for

socket

module

FOR

PC-8

RESISTOR

yellow-violet-orange

RESISTORS

brown-black-orange brown-black-orange

J

,Je

-Ie 16

J

.

.;

Je 19

Je

'/e

ve Je

J e 24

ve

432001 432001 432001

transformer

circuit circuit

socket

#555004 1

432002

board

shields

.Ie 26 Je

JC

.- C 29

"c

- e ./ C 34

JC .IC

'"C37

14

e

15

17

e

e 18

20

21 22

23

25

27

28

30 27 31

35 36

CAPACITORS

.0047 47 .0047 47 .0047 .0047 47 .01 .0047 .0047 47 47 .01 .0047 .0047 .47

.22 .0047 .0047 .0047 .0047

PC-8

mfd

mmfd

mfd

mmfd

mfd mfd

mmfd

mfd

disc mfd mid

mmfd mmfd

mfd

disc mfd mid

mfd

mmfd

mfd

200 mfd mfd mfd mfd

etched

~ircuit

disc

NPO

disc

NPO

disc disc

NPO

disc

disc NPO NPO

disc

disc disc

volt

board

ill

RIO

8

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POSIT

IONOFINDICATOR

OFFSETOFGROUND

STRAP

RESISTORS

CAPACITORS

INDUCTORS

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lf2

WAIT

1

WAIT

2

WAIT

RESISTOR

RESISTORS

RESISTOR

2.2 MFD CAPACITOR

Cll

GROUND STRAP

~

3.9

HEATER CHOKE

MIXER COIL L3

OSCILLATOR COIL L4

uH

CHOKE L2

~

ANTENNA COIL

L1

:UIT

~I

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23

RI9

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n°

LrJ

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PC-8

MX

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26

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35

33

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0

3:

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TOR

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-

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__

C31

~-~~::::C:2:s:::~:I~P~6

~::~~_.J

All

voltages between different with

V6

signal.

VI V2 V3 V4 V5 V6 V7

V8

V9

V71

V72

"

This entire the

VTVM

1

Use

a 100,000fJ

~

This

a

These

Quadruple

are

measured

the

point

indicated

signal conditions.

removed from its socket.

TUBE

6AQa/Ecca5

6ATBA

6BA6

6BA6 6AU6!EF94 6AU6!EF94

12AX7!ECC83

EMM801

6V4!EZ80

68l8/ECF80

12AX7/ECC83

voltage

tuning

must

voltage

mustbemeasured

voltages

section

will

range

fllter

CONDITION

NO

SIGNAL

NO

SIGNAL

NO

SIGNAL

NO

SIGNAL

NO

SIGNAL

NO

SiGNAL

NO

SIGNAL

QUIESCENT

STEREO

ANY

QUIESCENT

STEREO

ANY

indicate

go to

whetherornot

when

the

cathode

resistorinseries

vary

with

signal

capacitor

lugs:

VOLTAGE

with

the

volume

and

the

chassis,

NO

SIGNAL

indicates

STEREO

voltages

1

145

DC

1

-3

DC

'"

l

-.2DC

l

-.2DC

-2DC

215

0 0

255

29nc

45

135

(pin

the

DC

AC

DC

#3).

the

l

1

the

probe

VTVM

but

-.45

oscillatorisproperly

with

strength,

CHECK

control

using a

52

-1.5 205

20DDC

local

will

at

minimum.

vacuum

that

the

dialistuned

are

measured

2

3

0 .8

DC

0

0 0 0

DC~

DC

2DC

0

0 0 0

17.5 0

0

0 0

285

78

0 71

0

when common

alwaysbenegative.

#1

.85

oscillatorisfunctioning

adjusted

measuring

lead

285

DC

POINTS

Unless

tube voltmeter.

when

tunedtoa

4 5 6

6.3

DC

for

connectedtopin

AC

0

6.3

6.3 0

0

6.3

AC

0 0

the

FM

these

AC AC AC AC AC

AC

voltages.

#2

otherwise

indicated,

Manyofthe

between

stations.

station

#

DC

AC DC DC DC DC

AC AC AC

145 220

125

180

135

not

85 82 44 85

29

72

DC

DC DC

vary

0

6.3 85 82

10

42

6.3

0 0 255

0

0 64

and

should

band.Inmeasuring

#3.

,-'-

255

voltages

QUIESCENT

known

DC DC DC DC DC

DC

by

this

#3

all

voltages will

voltages

vary

are

widely

are

measured

tobetransmittingastereo

52

-.64

-14

1.1

225

7

0

DC DC

.4

0 0 0 0

DC

DC:

AC

1

DC

0

more voltag-e,

DC

l

than

53

150

1.5

1.1 .85

the

8

.8

DC

0

.9

DC DC DC

0

DC DC

DC

one

common

-.6

-7

-.15

-14

6.3

volt

#4

under

9 0

0

over

lead

220

DC

DC:

DC

DCa

AC

l

the

DC

of

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printed

in

U.S.1

Dyna FM-3 Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SPECIFICATIONS

SCHEMATIC