Military Surplus rigs SCR-194, BC-222_SCR-194_SCR-195, SCR-195, BC-222 Service guide

•

RADIO

~

AND

SETS

AUXILIARY

rL

Af;Slf'I

accorda n

il

uthorily

19.4;;.

SCR-194

AprD

CA

TION

Cil \lith

or

w ,n , Circul

17, lW

CA1W·E

p<

1r. \ :;, A

AND

SCR-195

EQUIPMENT

/

ar

I.U~n

I{

:1~ O

49 •

,

in

':

'i,

hy

•

,

I

,

,

TlDCHNTCAL MANUAL)

NO).

11

~238

.TJI[

WAR DEPAllTMlllNT, ,

WAflBI

l'Iot'O!'I.

AprU

11-238

11.

11142.

UI13

,!l

RADIO

S

IICTION

I.

II.

SETS

llineral.

Employment.

SCR-IM

Purpose

General description _________

Ma

jor

component parts

Description

Location and selectio n of freq.uencies
"",ttmg

"'-

General operatioll _______________________
Portable operatioll
Vehicular operation

Service _______________________________________ 10

. .

up

AND SCR-I95 AND AUXILIARY

EQUIPMENT

_________________

________________________

of

parts

eqUipment

______

_____________________

____________________________

_________________________

!

·u

__

__

.....

_

_

_

_

_
_

_

_

_____________________

__________________

__________________

___________

____

_____

rll'

/I:

i'

#;)-

...

ph

1

2

3

~

,

,

6

7

8

,

Storage _________________________________

III

. Detailed functioning of parts.

Rad io set

Radio set Se

IV

. Supplemental

Freq

Frequencies and dial settings, rad io receiver and
Parts

V. Remote control equipment R

Purpose

Setting
Operating

uencies and dial settings, radi o receiver and

transmitter

transmitter

SCR-

R-19S

data

l94

and

____________________________

_ __

pa

BC-222

BC-322

list

__________

____ _________________________________

up

and oollnecting_

________ .:_

___

__

11

12

__________ ___

rta list.

__________________________

___________________

___________________________

C-.66.

______

__________________________

__

________

_____

__

_

_

______

_

__________

IS

14

Hi

16

17

18

19

Removing from service
Detailed

Parts

VI. Antenna equipment RC-63.

Purpose

Setting

Operating ___________________________________

H.....

-:;-_IDovmg
Pa

rts

functioning

lisL_______ ____

____

up

. fro .

Iist.

________________________________

and connecting______________________

m servlce_________________________

______

________

1

_________________________

of

_________________________

parts

_

_______________

___

______

M558598

Or

•.•.

UNIVERSITY

Of

___

_

__

_

_____________

1<

..

C/o.lJfORN

lA

20

21

22

23

24

25

26

27

Tl!I(

11--238

,

..

SIGNAL

COflPSl

VII.

VIII

Purpoee

Oem".1

Major

Do!ecrlpUon

________ __________

d

~l

rompo

Carrier FM--32

Purpoge

LIt!tO<lnptlOfl

~

---.

lEImployUlent--

. Bag BG-82.

Purpoge ___

~rlptlOn

~--

.

EdnployUlefll-

pll

o'

'_

___

..

_______________________________ +

.... m

of

JIll

r1ll_

)lfIrtll__

___ _ __

__

___

and

_______________________

_______________________

.

fra

me FM--33.

______________

__________

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

___

_____

______________________

.

_________

_________________ _

_______

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

SEC'J"ION I

GlEINlEIRAL

_ _____ ________ ____________________

________

_ __ _ _

___ _ ___ ______ __________

__

_ _ _ _ _ _

__ __ __

__

__ __ _ __

__ __

____

_ _ ___

Parqrop/l

_ _

___

__

__

__________ 1

_ _ __ _ _ _

___

__________ 4

I'a"VOP~

_ _ _ +

__

_ 28

29

30

31

_

••

sa

__

__

2

3

1.

Purpo8e.~Ra

point-to-point
and

are hi

infantry

2.

General

ghly

regiment, respectively .

portable, loll' power,

transceivers.

voice communiclltion within

deacription.--<I.

They

dio

Ilre

sets

u9i!d

SCR-I94

Radio

high

to

OOffiDlunicate

5 miles. All the equipment required

is

carded

hicular operation

a

mast

scopi
tor'

ng

s back. Radio

vehicular operation
the vehicular

when requ

on the bllck

base

with

tubular

antenna

ired

.

of

radio

meaIlll

the

set

SCR-

of

connection to the

opentor

195

Itntenna used when

set

but

Power

SCR-I94

antenna

aooessorie

for both

does

equipment RC-67, which compr

s,

transmitting

is furnished as a

and

SCR-

sets

I95

are

the

artillery

SCR-I94

intended

battalion

and

SCR-

frequency sets which include

for

transmission

in

ineludes

the

set

not

O\'er distances

and

It

canvas bllg.

stee1

set

mast

~ons

to repJa.ce

is cllrried on the opera-

include

aC<ll:lSSOri

up

reception

For

the

es for

separate

and

receiving is sup-

for

19

to

ve-

a

nd

tele-

i!188

un

it

5

plied by one

b.

Radi

megacycles

dry

o set

lUring

battery.

SCR-ll»

has s frequency range from

two oscillator coils,

400 kilocycle separation."

range from 52.8 to
aWords

•

The

"a~

which

nnl)'

heen

tI:Ie

sa

ehalmels with 400 kilocycle sep

lI.

utborlr.ed ch

n~ed

11.

1110

400 kUocrcle cbanuel

hllY

at

...

400

500

6ri.8

llnn

kllocrdes;
kllocyde

el

me"nu

....

1!Cll

t ,

Radio

:ycles using one oscillator coil,

parlltlon

howen'~r

c

hannel

1ee.

or

2

and

set.

""ale.

SCR-19ri

fIldlo

.

lI1~n:r

Care

Or,~,

UNIVERSITY

affords

lI.fIItio

seta

~nc"

SCB-UH

....

muOl

.1

t....,.,

Of

C/o.lJfORN

<n.7

62

channels

has

a.

frequency

n (see sec.

and

,

~

IulYe beell

be

e~erdaed

lA

SCR-UlI'i

to

I.ned

to

ri2.2

with

and

IV

) .

UIII'

•

,

RADIO

SETS

seR-I'"

M.-o eCR-

U6

TJ(

11-238

,

Then!

design

band

i

~

of

no

and

the

opera

cons

SOR-194

ting

tru

ction are identical except t

diffe

is

l''e

nce between the two sets. The general

covered by two interchangeable

the operator's equipment oonsists of

•

(

hat, the

a.

micropho

UNIVE~\lTY

Of

CAlifORN

frequency

coi

ne

T-24-E and

IA

ls, and

TId:

.

11

238

...

SIGNAL CORPS

•

headset

SCR--IM

operator's

3.
The
two

parte for operation and transportation.

(1)

00-11

HS-22-B

is

handset!>

Major

covered

component

, whereas Ihe frequency band

TS-ll

radio set SCR-l94 and associated equipment is divided into

For

on

portable use the following equipment is carried

tbe

back

of

mitting and receiving

-t---

1.

•••.••

1.

.•..••

1.

....•..•

1.

.•.

I

.••....•..

1 __ •••••••

1._

•••••••

1

___

••

...•

____

. • '

.•.

•.

• .

. . . .

.....

...

• _ _ _ Radio

_. __

• •

An\.enna

..

Bag

Battt!ry BA- 32

Headooet

Microphone

Tube

••

Tube

BG-71-

VT

VT-67

of

the

by

a single ooil and there are provided two

- E.

part..--a.

Radio u t ,

SOR-19.

the operator and constitutes a complete

unit

neel",",

with antenn!, and power supply:

-

AN

- 29--B t .

••••

H8-n-B

T-24-E·..........

- 33

..••.•••

••••

and

__

._

••

••.••••

••••••••

• •

....

•......

trall.llmit\.e r B

__ • __ • __

••••••••••••

------

.

••.••.•••••••

•••••••

••••••••

.

...

.•

._.

__ . __

••.

••

...

..

..

..

C-

222

•

•••••••••

••••••••

••••••

..•

. . .

•.•

••

_._ • • _

WMP'1o

••

....

..

•••

•

radio !Il'It

(fig. 1).-

in

bag

trans·

_"".

."

,,,

>200

.

.."

&00

.

.

..

..

..

..

,

AD_

_ . j

•

__

• N

NoJ.N·.A

__

AN· ......

I

B8-,..A

T-"'A

bo

__

.. H8-

.

T_"'S

IUbolitulOd

-..

2t-C

od

.....

. T-1'I-C.

lor

.)

bo

..

_

...

"'UulOd

T-1oI-D

AN· ...

...

(2) Auxiliary equipment and spare

CH-33 as follows :

L

.....

2

•...

1. ..•.....•

1_

. _

1

__

•••

1 • •••• _

2

__ •••• _. __

2_

...........

~

feet

..

.••

......

•..•....

__ •••

••

........

....

___

.

Ant.mna

Banery

_ . .

__ • Cbeo,"

...

Binding

_.

Bo~

••

C

Tube

.

Tube

Wire W- I26 {or

--

AN-

BA

poIt

BX- 13

CH

ord

CD-I9li

VT

- 33 {

VT-67 {epare) __ ______ • _____

N-B'

- 32 (epa ... )

TM

••...

- 33 •••••••

••••••••••••.•••

apa

--

(

~

- 176 (.pare

•.......

••••••••••.••.••••••••

... ) __

W-~-

S. bu l

lor'

T-_,

1.,

.....

.........

H8-22-S

parts

--

... ) _. ______ •

________

.•

._

•••••

..

_ . . _

__

) •

.•..•••••••••

.............•..

••.•.

___

....

bo

...

botl •

-

----

.........

._.

________ _

....

AN·..c

.

.,t<Id

an>

..

• • _

•••

_.

__

... _ ..

lor

10 _ lUI

_OJ'

Total

....

.....

2S.

lor

T·"'Z

carried in chest

--

-

__

..

.

."

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••

·

•

_.

__

",00

,&

10

.....

.

.

..

..o'

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.

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.

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,

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.......

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AN·lIP

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.....

bt

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Ior

..

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AN_S,

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bu

...........

Or,~,

UNIVERSITY

.11<"",

Of

AN·..c

C/..tJfORN

IA

1--

10 _ ...........

--

Total

M

14

IorL.b.lo

b.

Radio

let

RA

'OIO SET:> SCR- I U " NO sca - ue.

SC

R-

J96

(fig. 2)

.-

The

ra

dio set

TM

....

SCR-191S

11-238

and its

9 )eiated equipment are divided into two

tran

BG-71

mitti

s

1 _____

I .

I

I

2.

1.

I

L

sportation.

(1)

For

on the back of the

ng

and

¥ (2) Aux i

pare

..

.. _ ..

... _ ...

parte

••••

____ . __

______

__ .... __

___

.. ____ . __

.... ___

._ .__

._ .

__

..

. _. _ __ T

__

_...

_.__

. _

portable use

l'eOOivillg

liary

are c

..

__

___

equipment

arried

A.u.pte
Antenn.

Bag

B.ttery
H.n

Radio

ube

Tube

r 80-1>2

BG-7L ________________________

dset

receiver

VT-3:L
VT-67 ______ . _

th

e following equipment is carried

opemt

unit

with anrennll and power s

in chest

___

AN-

BA-32

TS-II

30-

________________________

-E , ____

.nd tr.""mitter

••

____ _

or and constitutes a complete

neceSSllI'y f

CH-33

__________________

B , _______ ____ ___________ _

. _________ __ . _

•• ___________________ _

••

___________

or

as follows:

B

par

vehic

C--

3Z2_

._. _ ••

ts

ular

___

_____

....

•..

for

operation and

upply:

operation and

11'0.1"

_ •

__

_

••

__

__

. _

__

_

in

tran

1.

bag

__

."

. 00

.00

'

12. 00

3.

.00

.>0
.

s-

00

>0

' &

"toun.

'a

...-

QuoDtI',

L

------

,.

---

2 _____________

L __

--------

L -

_._----_._-

-

----------

'---

L

2

2._.

2_ . .

-

.-------

._._._.

_.

.....

feet

A N-301I1&7 be

~l/-A.

----

--

---_._._-

--

-----_.

___ ...

___

.

._-----

. . -

. . _

_

----

_-

..

"

...

I1o<I

TI

H I-

R.

Antenn.
B.ttery
Binding

So>

Cheflt

eo",

M
M
MM

Tube

T

Wi..,

Mt
Mt

o'"

aX-1

C

t

"""tion

W- I U

,u,,",

TII-H-C,

CH

D-19~

b_

"""

VT
VT-67

Ior."toun.

AN-

BA-

,..,

tion M8-1>O

- 33

30-

32

TM-176

3 ______

-33

________

_

.

MP-Z2.

M

("pa..,)

(o

pare

,

,,

AN_B

TII-H

_D

..

'

"~

(sp&re) _

B

•

(8J>.re) _

___

___________________ . _

___________ _ • .

S-51

.........

______________ .

"

_____

spare) . ____
spa..,)

TIJ-ll

8pa""

. (N o A

_' '*" be

.

-

----

. .

---_.

) .

______

_ . •

__

N_A

"'boll,,'.'""

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----

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30

•

...

"

4.

Description

'lJO-m

and

transmitter

and BC

of

-Sfe

parta,

(figs. 3 to

--a.
11

Radio

recd

!ler

~

and

incl.) .- All elements

tT(nllf1nitter~

of

the

reeeiver

are chassis mounted and contained in an aluminum-

•

Or.

,",I< "

UNIVERSITY

Of

ClillfORN

lA

TM

11-238

•

•

-

•

of

-"

2q

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•

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alloy case. 111is

from which

Iilrllp,

bf"u.ery

I)Jug

an

in

in t

it

antellna mounting, and

pillet. Connection to the baltery

he

bottom of

unit

deri\

isdesiglled to

'1\t

ilS

power.

th

e cha

(,

6t

Th

two

ssiH

6

dil'fl(:tly 0

e case i

strop;! which serve to hold the

lind '

Il

UNIVERIITY

11 top of

ll

fiued

i

~

completoo t

socket in t

0.'9,,,..1

fr

n

Of

CAliFORNIA

II

b.uel1'

wi

th a carrying

he

top of

BA

hroug

--32

h

II.

th

e

•

,

"

RADIO S

ET

..

SCR- i U4

AND

SCR- \

US

TM

11_238

•

I

I

battery. Aceess'w the

!h e

li

Mp

oXlils

radio sets

IId

diti

mounted on

0

11

the

is closed,
To remove the tube

slid es at t

filly

ona

l s

chllssis.

and

he

sides aud opening

then

SCR-l94

be

instu lled or removed.

and SCR-195 hav e devices added

upport for

th

e inside of the

TI

~

c

the sp

ring

VT-33

top

of the chassis

the tubes.

top

ap

fi

ts

over the

clamp

fits Il

(rom the ciamp, the le\'er

may

the

Th

ese consist

cover,

lin

d a spr

tube

round Ole ba

be

gained by relea si

cover. Tu~

Lat

est

VT

se

procurement

of

an

insulating

ing

-67

cla

when the

of the tube VT-33,

011

s

and tuning

s of

to

provid e

mp

mou

nted

cover

the side

ng

ca p

of

I

Y'oG"

a._Ha ~

the clamp is

The
openi
side
unit,

both

is

e1I'

chllS!lis

ng the front

of t

he

except

receh'ing

chan

ected

ged

by the

lo

...:e1>'01'

pr

essed with a pencil, acrew driver, or si

may

elise

for

and

from

reillY

ond

t

...

n .

...

U~r

flC-~2~.

balte

be

cover

and

r1

.. , ....

and

removed to f

and taking

one

in the rear.

..

acilitate

a few minor items,

tran

~eiving

smitting.

to

UK

- 10, which is

11

tr

llllsmin

7

Ute.lor ,-....

te

.....

_

~"tl"l

ins.pection or re pair

out three

The

employs

screws, one

receiver

the

le operation

ing

in

turn

UNIVE~\lT Y

by alt

Or;gtr

cont

.Iff"",

Of

CA

Ilw

..

l,..

.

milar

and

SIlm

tran

e elements for

of various el

ernate

rolled

lifORNI

connections

by

the

A

co,

rl''''

at

smitte

ements

.Dd

object.

by

either

r

swi

tch

TM

11

-238

•

SIGNAL CORPS

•

"au

..

4,_II..dloo

0'e<.'01

...

. .

~d

_I.

t

...

~."'HI~,.

~·llh

4

00

I

IC--ZZlI.

k.

ou\>CIt.loI""

(.ont

..

«I, .....

OO

b'O,·ed obowln.

,

dial

8

<

•

o.>9"olff"",

UNIVE~\lTY

Of

CAlifORN

IA

TM:

11-238

on

Ole

teewr

circuit.

justlllent,

and fila

cates

microphone or hllndset.

and radio -frequency oscillator in

Contro ls are p

ca.

libration 8witch,

ment switch. The meter on the

the l'oltage

to conneet the I

b.

DWl ,e

BC-322 are

ak

eRch

RAD

IO SET;; SCR-

The

ro\

on

the

lIIlId!;e

t or headset and microphone.

ploftl.-Rn

'ided

fila

ments,

dio receivers and transmitters BC-222

llS

ca

libration adjustor,

provided with H dial

I'H

!le

ANI)

t

Usell

a.

SC

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a superregeherative de-

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follows: chlumel

and

left

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!<Cale.

aide

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•

or

frequency

fil

ament rheostat,

of

the panel indi-

llt the r

ight sent

ed

and

off

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in

-

I

r

400
are
cured
screws. U

interchange
screws,
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(

kilocycle subdivisions and printed on a metal plate. Many sets

equipped a.I

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se

int

erehllllbte

of fl'l!quenCi

Ea

rlier sets were

of

Ole

!!O

with a

the

400 kilocycle scale only is now

dial scale

the dilll

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provided with

600

er

plates

kilocycle scale, the two scal

the other, by means

of live
auth

it ill

sc

ale plntes, and replace

necessa

a.

reversible

are

ry

to

gil-en

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in

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es

being se-

machine

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th

e screw

IieCLio

plate.)

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an

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assembly of telescoping mmiel metal tubes which, when in use,

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largest or lower sections using coil
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eight

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lengths

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9 feet

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an

of

sections M&-49, MS-5O,

posts TM-176, one m

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411,

4,
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and

MS-IH

marks

desirOO.

of

and

bears

to use a vehicular

antenn.a equipment RC-(j7 is

over-all length

inches from the top

The radio

for

use

in

vehicles.

sections assembled is 6 feet
shoulder

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of

the lower section.

base

MP-f2.-The

the

lIlt

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type number

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se

MP

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three

mast

the bottom

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3%,

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inches from the

mast

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base consists of a ceramic

•

body

near

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sections assembled

of

mast

top

of

each section

the lower end.

with

the

It

radio

includes two

also includes two

10 feet of wire

the shoulder of

sections MS-:iO

of

these two

to the bottom

of

set

is

the

the

in-

sulator
tion

fastened

of

the

to

a steel

antenna

through

provided in the top of the

The

transporting

plies all the necessary
in

and

approximately

two

able use

web shoulder
three

steel

f.

Battery

the

the

or

g.

Bag B0-71

plate

top for

set.

three times

of

compartments, the

is designed to

vehicle.

BA-.'ffl.-This

making

Under

continuous operation the

20 hours. When used intermi

as'great.

radio

(fig.

seLs

12).-The

SC

straps silpilar

set

ali eleetrical conneetions required between

R-I94

main

plate

in such a manner as to

pennit

8n angle of 180°. A metal socket

insulator

pennit

is a block

voltages. A

canvas

and

to

those on the haversack.

one being used

to receive
fa

stening

battery

6·point

carrying

SCR-195.

mast

to

section MS-61.

an

upright

so designed

socket is

life

ttently

It

for

of

this

the

bag

is

has two

carrying

that

life

for

It

rota-

i8

on

the

it

sup-

provided

it

battery

may

the

is

be

port-

adjustable

comprises'

the

radio

receiver

and

operation.

carrying

the

1 headset

1 microphone

and

II.

pocket on

AN:..w-B.
the bag,

there
be inserted
to

the

weather
the top

set

and

of

transmitter

The

follow

RodW

other

ing

,~I

8O~19~

HS-22-B

the

To

permit

is a hole in the top

in

the

set

panel

Further

BC-222

or

BC-322 complete

compartmenLs are a pocket

equipment; •

1

T-24-E

aide

operation

and

a slide fastener in one side to

for

to

carry

of

of

prot

2 handsets

ing

the

the

ect the

when not in use, an additional

the bag.

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Bap may

be

Rodw

«I

adapter

the

set

bag

antenna

while being

so

that

equipment

Dap

flLlltened

and

in

8C~J9~

the

ready

rear

S()....52

TS-ll

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AN-

29-B

carried

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permit

in

inclement

access

has been added

down

with

the

tor

for

or
in

may

to

two

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end snap fasteners,

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It

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SETS

or

when the anten

SCR-

and

that

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l\14

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SOR

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it

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fastened by the one center snap

y

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fastened,

tearing one side

h. Bo!};

boll:

provided with a

radio receiver Ilnd transmittel' BG-222 or B

posts,
necting separate

available. and to facilitB

cireuits.

the

BX

and

Il

battery cable.

The batteri

force necessary to use

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-13 (fig.

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is designed to provide means

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the inse

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connected by means of the cable, a

to

the

unfasten it

bag

.

tid

mll.y

rectangular metal

at the bottom of the

C--322,

ill

case there is no battery

rti

on

of

meters in

several binding

rosult

of

BA

th

e several

ll

leads

in

oon-

-32

•

of

which are identified by stamped metal

posts, f

to indicate microphone c

plate

I

MPORTANT:

eously conneet
markoo M
connected with a
circ

a.s

thi

Caution: When making

BX-IS,

If

thi

sumultanoous!y. Do not
co

nnections even if the

our

on eit

her

side, serve to provide

urrent

,·oltage.

If

it

is

desirod to use this

uit

s.

IC

Do

ing

RO.

not

meters, each of the three pai

CU

R.,

RELAY

jumper

w

i~,

jumper the bind

s will short-circuit the battery.

or

changing jumper connections on box

be

sure tJlat the battery cable is disconnect

s is

not

done,

it

is difficu

lt

attempt

fil

alllent switch is tUnied off, unless

, relay

CUR., and

otherwise

ing

to avoid burning

to

markers.

~ady

cu

rrent, plate

connection of meters

box

rs

PLAT

th

ere will

posts marked

ed.

make

or

change these

TI

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binding

cur

rent, and

witho

of

ut

simultan -

binding posts

E CUR. must

be

three open

PLATE

VO

LT

from the battery.

out

the

two tubes

jumper

the

be

S,

battery is disconnected.

(1) To provide operllting batteries if bat.tery

BA--32

is

not

avail-

ab le, the following Signal Corps batteries are suggested from among

th

oaa

which may be on

,~,

A (Ii!&mentl

B (

pl"te

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(gri

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M

(microphonel

___

. _________ 3

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__________

(2) The following cu

normal f

or

the

rad

io

hand:

___

___________________

4.6 __________________ __

rrent

sets

and voltage readings (approximate) are

SCR-194

and

SCR-19l'S:

__ __

2 BA-17

A-S.

3 BA- 27.

lIlA

- 27.

Or

BA-23.

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C/o.lJfORN

lA

TM

11-238

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Tra

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MIcrophone c
Plate

A variation of plus

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fitt

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two

90Ckets

r

plate c

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rent

"olt age

SO-6

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simi

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with a plug similar to plug p L-(;5

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SIGNAL

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plate

current

______________

______________________________

urrent

_____

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RPS

milliamper

(modulatetl)

(u

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on

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__

___

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21.5

45.0

35.0

18.6

35

to

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within

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simultaneously. T
th

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sockets

too

of

fitting.

nd

Th

e

he

plug of the

io

re\:

eiver and

uuit
th

se

l'\'e

e radio set

Ild

tnll

the adapter aceummodate the plugs

handset cords.

j.

lleatilJ

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special c

o,'er

adjustable to fit

be locked in place. The

pl
This

(si mil

the welirer 's head and a lenther strap

ug PJ.r...51i

headEet

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er

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.-

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C-

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jlLck

JK

of the radio set 8CU- t94.

combine light weight with <:omfort a

~

to enable the two handse

8C

np

ter

smitter U

that

R-196

fits into socket

each

C--322

on

con!!

is

, to

be

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80-45

, and the t wo

the end

ists of two receh·,

equipped

trap 8'1'-20

below. The Illtter is

of

a sliding s

D-WI

--38

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on

Ill

ay be wo

the

is

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mi

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l.ll

on

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the

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to fit

cord.

to

a hilt,

I

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helmet,

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with a

b"lUl

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mask.

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it.

:

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hand

cordage

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connection

microp

hone

S-22-

to

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is

pllrt

T

,

-24-

II

ja

E'

(

fig

. 16).- T

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ck J K-38

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is

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the attnchment

made of

of

one or two

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of

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find

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R- I

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high

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his consi

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microphone ele-

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11-238

RADIO SETS SCR-

jack
radi
by

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incorporates a radio
a

JK-38

o receiver

means

each

radio

m. Oord

the

same

socket

80-86

is not includeod. (Connection

of

and

an

transmitter

adapter

set 8CR-19!i.

OD-1M

type

(figs. 1 and

as

that

frequency choke, a

on

the

nse the microphone or

set

than

fl.

videod

antenna

their

BiMiWJ

to

alford

to

the

cords allow.

po

rt

TM-176

a means of oonnectinjl the lead from

radio

!let.

80-52.)

used with

oth

er.

handset

(figs. 1

Wh

en so em

Uf

AND

OCR-US

of

BC-a22 in

Two

2).-This
the

It

is employeod when

at a great

and

2).-The

ployeod

this

of

these handsets are part.

is a

microphone

plug

PL.-loo

er

distal\ce from the

it

&....(I

two

handsets to

the

case is accomplished

12

-foot

binding

is

exTen

and

handset.

on

one

it

is desired to

post is

th

e vehic

IICreweod

sion

cord

end, and

radio

pro

ular

into

insu -

It

-

lator

videod

divided

to

ported.
ried in the same

from

Loeatlon "TId

!leUI".

aeneral

IN

o.

Ohest 0 0

for

the

lid

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carrying

into

four

to

The

the

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(fig.

compartments

prevent

mast

cOffip>t

by a wooden block. .

IleleerlQI)

up

equll)[)}.mt ______

opel'8.tlol) ___________

Porlable operatton___ _ _

cover of

18).-Thi

auxiliary

movement

the

I!I!t.

s is 1\ reclangu

and

spare

as

illustrated, and

of

the c

equipment.

base MP-22 shown in

rtment

as

tbe

box

8J:CI'lON

BX-13

IT

EMPLOYMENT

f)f

t r

eqllllnd""________

__

___

______ ______ _________

______________

__

___

_ _ ___ ____

___

____ _______

___

_______________________

lar

ontents

front

and

~__

_

___________

wooden box pro-

The interior

pads

while being

of

the

sepun.ted

_____________

__

___________ ____ 6

are

chellt

_

_____

__

fastened

tran

ill

there-

P

.......

_

___

___

_ 8

is

s-

car-

ph

II
7

.

VehiCU

8enlcll

SIQrage

location
determined
area. between

vated

lIS

lar

_________

__________________

!i.

Location

poSitions

the

field

operatloD

c__________

.... ithin

by

military

transmitting

stnmgth

__________________________ __ __

and

any

with

elevationa, ridgea,

tween
miles

as

pennissible.

or

tl'ansmitting

or

more

the

This

hills lie between

__

___ ___

__

_____

___ _______________

selection

givell

ot

area

for

requirements

line of si

of

the

signa

and

~iving

ght

l is affected

and structures,

and

fTequency

the

receiving points. W i

or

channel chosen lIhould

is

particularly

selected loeationa.

_____________________ 9

___

______________

_ _

_____________

trequencies.-The

uperation

snd

the kind

of

points.

between

poin

ts

considerab

as

well

lIS

by

th

true

if

irregulllr

At

frequl:lllci

___

_______

this

of

In

are

the

ra

nges

terrain,

______

most s

set

terrain

gene

__

_ __

__
uitable

will

in

ral

1U

11

be

the

, ele-

advantageous

ly

by

ground

distance

of

be

be-

8 to
as

low

ridges,

es

in

the

,

ti

19

0.

•.•.

UNIVERSITY

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..

C/o.lJfORN

lA

TJ[

11-238

...

order
negligible
Propagation
traveling

conducting objects such
ground
cannot

a

short
culty.
may
When

these

separation,

of

those

with

in

elevation , hills,

be

ertthlished

distwoe

U change

used

low frequencies asswne considerable importanoe.

of

signals

straight

away

of

be required in

seta

nets

of

differe

should be aa>igned frequencies

depending

w

lines from

location is

order

nt

uJlQn

SIGNAL

ith

these

appe"ars

as

smokeBucks,

or

ridges.

at

one location, removal to

may suflioe

to establish satisfactory communication.

nets

must

those a.vailable.

CORPS

sets, various phenomena which

to aasume

point

If

the

to JlQint

wawr

8IItisfacwry communication

to reduce

not

sufficient, a change

operaw

from the same locality,

or

characteristics

and

toWer'll, buildings,

or

channels

n!8ecting

another

eliminate

of

of

location

the

of

channel

muimum

are

light

from

and

difli-

6.

Setting

transmitter
the

marking
insures
battery

straps

front

cover

Open
side,
9OCkefi>

The two

are
Coils

respectively. These

that

~et..

which pass underneath

cover by releasing

out slightly

the

and

furnished

C-

top cover by releasing the' two

raise it.

and

plug-in

114

up

equipment

BC-222

FRONT
the

place

and

battery

Secure

Insert
the

coils are designated coil C-114:

as

a
C-11!5

(fig. 19) .- Place

or

BC-s22

011 the

plug

the

and

battery

the

then

tubes

desired ' coil on the

part

letters

of

are also marked

are followed

on top

battery

of

the

and

Bnap slide

down .

VT-33

radio receiver

the

radio

of

the

is

at

the

set

iB

to

the

around the battery. Remove the

at

the

This

and

with

by the serial number

battery
front

properly

case by fastening the two

bottom

exposes

snap

VT-61

terminal

and

slides, one on

transmitter

the letters A

of

the

in

and

receiver

BA--32

the

inserted. in

and

their

posts provided.

ooi

set.

pulling

front

rwpvctiv

l C-115

BC-222.

and

90

that

This

the

the

panel.

either

and

and

of

the

fl

B

\

radio

RI"ll

quencies from
quencies from 86.9 to

on a
and
cycles. Connect

post in

attlU":hed
and

with
is

on

coil C-114,

receiver

not

for

the

interohangeable from

bracket

transmitter

radio

in

secure

radio

use

with

ground, extend

and

C¥l

inside the case (fig.

receiver

radio

it

with

receiver

transmitte

.1 to 38.6 megacycles,

BC-322

the

receiver

and

the radio receiver

aod

reduce

52.2

antenna

and

the

antenna

megacycles.

covers frequencies from

transmitter

and

snap

transmitter

it

r to which the ooils belong.

set

to set. Coil C-114 'oovers

and

1).

lead of

transmitter

slides.

AN-29-B

by two sections when

the

BC-222.

Antenna

BC-222

and

transmitter

coil

The

'The coil

coil to the

BC-322. Close the oover

C-

coil

not

This

AN-29-B

and

11!5

in

52.8
antenIUL

II.ntenna

BC-322.

to its full length when using

"sing

oovers

in

use is

radio

to

lead is

coil

The

M.B

terminal

is for

AN-30-B

coils

the

the

receiver

fre.. (

fre-

carried

mega-

already

U911

For

use

C-11!5.

,

t ,

20

UNIVERSITY

Or.

,",f< "

Of

C/o.lJfORN

lA

'.

•

I

I

•

"

~

UNIVERIITY

ow

Of

CAliFORNIA

TJ(

11-238

..

7

On

full length.

!!Coped.
vided.

ea

the ground, anwnna

For

portable use the

Screw the anwnna firmly into

The

sily broken

insulator of the antenna mounting

if

subjected

by a loose antenna
Connect

the socket

7.

t

he

filament<!

s

tat

to ON.

the panel

rtJgardless

the headset and microphone

S0-4~

General

of

of

by

the set, otherwise the filament circuit will n!main open

on the panel beneath the filament switch.

operation.

turning

The

cord

the position·

or

S\GN"

AL

AN-30-B

to

unnecessary stmins such as are caused

by

striking

-a.

the

plug

Pl'elimi

toggle switch under

must

of

the fill.ment switch. Adju

CO

RPS

is

B.!ways

anunna

the

the

or

rw.ry

be

inserwd in socket

used extended

s are used

compleu

to

ly

insulated mounting

is

fmgile and is

anUnna aga in

st

obstacles.

the handset by means

adjlUtment8.- Switch

the

filament rheo·

SO--4~

st

the

its

ule·
pro·

of

on

on

fila·

ment rheostat
luminous

to

facilitau

hi ss ing or

pointer

rushing

ately, indicating
the switch on the micropho
n!lay BK-lO, making the necessary circ

set for transm

th

e set is operating properly you should he
receiver.
on which
be

checked

Set the tuning control marked

it

is desired

at

b . .Adjustment

so

that

checked.

its readings

Slight

until

and

the meter reads 2 volts. The

luminous mark

on

th

proper filament voltage adjustments in darkness. A

noise should

th

at

the set is ope

ne

be

or

handset.

heard

rating

uit cha

itting

freque

. Speak

to

operaU.

nt

intervals to insure on· frequency operation .

of

calibration.

of

frequency channels may be easily and readily

variations in

or

whistle into

Th

e calibration adjustment should

-The

th

e iDductanoo

tuning

C

e scale

in

the

as a

Thi

at

earphones immedi ·

n"!Ceiver.

s should actuate

nges

th

e microphone.

ar

this

HANNEJ

diB.!

scale is

or

capacitance

mewr

the 2-volt

Operate

to

prepare

sound in

~

to

the

channel

ca

librated

has a

point

the
the

If

the

of

the

,

set, oceasioned by chllnge of relative position

th

e wiring, differences

Ilnunna capacitanCB caused by changes
calibration to
pac

itor

is adju

is used to compensate for these difference

sted and set by

ADJUST.

be

Do

inaccurate.

not
as the threads are easily
the switch llbove the
and forth 'through one

control ia turned

thr

in the rushing sound produced

cides

correct.

eXl!.ctiy

If

it

with

does

not coincide l'ltactly, readjust

int

roduced by c

The

th

e small knurled thumbscrews marked

use undue pressure

hl!.nged

in

location, will cause

small adjusting or trimmer ca·

on

th

e lock !Iut of

damllged. To check this adjustment,

meur

to

ON.

Turn

the

of the red line s on the dial scale. As the

ough this line, there should

in

th

e receiver.

th

e red line,

the

adjustment

of the elements OJ: of

tube

s,

or varil!.tion

in

the

s.

This trimmer

this

control

turn

tuning

be a mar

If

of

the

control back

ked decrease

this

point

coin-

calibrati on is

calibrator until

t ,

22

Or.

,",f< "

UNIVERSITY

Of

C/o.lJfORN

lA

it

does.

RADIO

In

making the adjustment, use the red line

SEn;

8IC1\

- 1 g 4 AND SOR- l

•

\1

&

nearest

TIl[

11-238

,

the

right

hand

regenerative
erable
tuned

quency
difficult
the

For
operating

from the

or"

c.

Netting

amount

and

of

sets

are

example,

upper

more

detector,

in

the auperregenerative quenching.

to

operate

all

in II.

other
been found to
the mll.limum

together,

and

communicate

range of the

than

and

of

energy

two

dial

,tatio1v.-These

scale.

when receiving

both

on the frequ ency

side bands, differing from

more

at

approximately

if

"thrt\e sets, called A,

net

on

two,

be

true

range

than

two sets on the same frequency unless

the same distances from each .other.

II.

given frequency,

little

for

of

difficulty will be encountered.

all distances

the sets.

B,

and

and

If

, however, A

C is a considerable distance

with

each

other

eW!ily,

and C can

sets incorporate II. super-

there

this

is

radiated

to

which

the

frequency by

For

this

reason

II.

the

C for ident ification, are

each is the same distance

This

ranging

fro

from a few feet

and

m both, A

hear

both,

B

and

but

II.re

consid-

set is

fre-

it

is

ha.s

to

close

B can

neither

A

nor

which are
the signal coming from

B can

stronger

hear

C, since

over the

C.

the

short

The

receivers of A

distance gepa

difficulty

due

and

to

B generate squeals,

rating

A

and

B

receiver regeneration

than

encountered in operation with unequal distances between the sets
will be roughly
two nearer together

most distant..
set

circuit

SCR-l94

of

the

rl. Twning to nearby Itatio-n.-The

will, in

there
required in

within

the

rushing

general , be assigned.

should

order

the

distance

sound

proportional

having

This

by

difficulty is overcome to a certain

the'additi

detector tube.

be

very little,

to roceive signals clearly. When

range, tuning

11.8

a signal is received. Signals will

sm

if

to

the

the

of

If

any,

inequality in

the

distances,

the

most trouble in receiving the one

a

2O,OOO·ohm

operating

the

sets are calibrated accurately

readjustment

is effected by

extent

resistor in the

frequency

of

the

tuning

operating

noting

the

in

radio

plate

or

channel

control

well

decrease in

be

I'\lOOived

with

greatest

clarity

when

the

receiving set is tuned so

ss

to

the rushing noise to a minimum on the assigned channel.

making

f

ound

assigned by an appreciable amount,

order
other

e.

strength
more
communication

final adjustments, check

that

to reduce

the

sets are

tuned

the probability

channels.

Tuning

i6

accurate

ttl

not

d~t<tl1lt

high
tuning

is

to

rtation.-At

enough

is

begin sho

the

operating frequen cy.

to a frequency which differs from

retuning

of

interfering

lon.!l'!r ranges where the signal

to

cause a decrease in the rllllhing sound,

n~EsEary.

uld, if

In

thi

possible, be agi .

UNIVERSITY

should be effected in

with communication on

s case the time

Ed

0..

'"'

I<

"

Of

C/o.lJfORN

lA

at

upon before-

decrease

After

If

it

is

that

which

TX

11-238

1

S1G~~AL

hand, thus eliminating any doubt

It

is also well to

to receive when first attempting to establish conta.ct.

f.

Emergency

cannot

be carried on intelligibly, code signals may be whistled into the

pl'eal'ran~

Mean"

of

which station

~icatWn.-If

microphone. These signals should

CORPS

that

the other set is

is

to

transmit

voice communrcatlOn

be

distinguishable where the

would not.

g.

81'eak-in.-The design

''brell,k-in'' operation,
station

while he is transmitting to you.

tively close-and is standing by, the attention
attracted
phone a

by

few

closing and opening the switch on the handset

times.

that

This

of

this equipment does not

is, speaking to the operator

If

the

other

of

the operator may be

interrupts the rushing noise

in

operation.

and

which is

voioo

penult

of

another

station is rela-

or

micro-

in

the distant

,

operator's receiver.

h.

Faultl.-Very

of

these radio sets. Any

or

from tube

the

same and

(1)

(2)

No
Neces!lity

battery fallure.

are-

rus

hing

few faults are likely to develop

diffi

culties which occur will probably result

The

indications

of

in

the operation ,

these are generally

noise in the receiver.

of

adjusting the filament voltage beyond the required

two volts before the rushing noige is heard.

(3)
(4)

Weak signals.

Set

too slow to oscillate

or

fails to oscillate.

(5) Weak side tone.

If

these indications are present, tubes and batteries should be replaced

with

othel'!!

£.

Orydau.-The

that

are

known to be satisfactory.
crystals provided for calibration purposes

individually marked with a serial number which corresponds to

an'!

the

seriaJ number

of

the, set in which they are w work. They should not

be changed from one set to another as each set

epond w the frequency

or

remove the crystal from

;.

O()7llleTVing

BA-32,

sets should be turned off whenever possible

batteri.u.

nate unnecessary battery
out

OFF,

it

the handset or microphone plug, plac

or

by

turning

will go.

It

is good

has been obtained
partially discharged will not

that
which

a long period

are

run down, as evidenced by their inability to deliver two

of

of

the crystal furnished with it.

its

holder.

-Due

drain.

to the relatively

This

may

be

aceomplished by pulling

ing

the filament rheostat counterclockwise as far as

practice to keep

from each battery,

be

taken

operati

on

will be required

a.

record

so

inw

that

the field when

is

calibrated to corre-

Do

not open

short

life

in

order to elimi-

of

battery

the filament switch

of

the service which

batteries which are

it

is known

of

them, Batteries

~

at

t ,

24

Or.

UNIVERSITY

,.,1<

Of

..

C/o.IJfORN

lA

T1II 11--238

volts

out

8. P

may

RADIO SETS

to

the

the

band,

ortab

6lamen!

should

le ope

or

by failure of

be

discardeji.

ratio

n (fig. 2O).--a.

be establis hed between individuals moving

SCR

- I

94

the

AND

receiver to

AlItmna.~Communi

assembling the items listed in par-agraph
SCR-I94

, or

paragraph

3b

(1)

(f

or

the

SC R-l

3a(1)

l"Iu\io

~~

OEICiUat.e

about

through-

on f

for the nt.dio

set

SCR-195),

,-"

c

ation

oot

by

set

and

-

carrying

AN- 21l-B

the

(or

equipment on th

AN-30-

B) should pre ferably be

l)

back

II.!:!

collapsed. T,,·o sections may sometimes

three sectious occasionally.
use only with the norIllal

C-l at
and

the base

of

the

locked selting.

antenna

(

Howe\'er,

antenna

should

the

or

with a single section. Capaci

I)e\"e

UNIVE~\lTY

illustrated. The

opel"1lted

be used to ad\'antnge and

CHli

bratiOIl is

adju

antenna

e<omp

sted for

let.ely

tor

l' be

mo\"ed fl"{lm

Or;gtr

.Iff"",

Of

CAlifORN

its marked

IA

TM

11-238

....

b.

Tvning

slightly when a set

tM

60!'tII.-(1) Since the

is

lifted

sraN

to

AL

the

CORPS

operating

carrying

frequency may change

JIOIIition

on a

man's

back,

I,he following procedure is recommended to ins ure operation on

assigned channel:

(a)

and

(b) Place the

and

(0) Now place the first eet

Place

adjust

ons

it

set

carefully

other

carefully tune

it

in

operation on
to

the desired channel.

,

set

in operation on the back

to

the

6rst

in

the

set.

carrying

ground

position

with its full

of

the

and

retune

antenna

operato

it

to

8I!COnd.

(2)

antenna,
ments

Where

it

one

eet is to remain in operation on the ground using full

is beat to have the

operator

of

this

eet make any readjust-

which may be necessary to keep in communication with the

an

r

the

car·

ried set.

to

interfere

carried

c.

Ra

antennas
set

is man-carried and the

set

is in motion, communication may be affected by proximity

obstructions

If

the

frequency change due to this readjustment is such as

with another channel, steps should be taken to have the

set

retuned. as required.

nge.-It

the

and

will

be

operating

condition of the

found

that

with two

range is not reduced appreciably when one

other

hi

on

the

ground.

terrain

however, considerable reduction in signa l
one eet

use

9.

antenna
MP-2'2.

position

\lSei&

short

a short. antenna, and still

antennas.

Vehicular

mast

·

This

to

be ooeupied by the set, while keeping

further

operation

(fig.

21).-Fol'

sections are used in conjunction with the

base should first

be

secured within 2

being

strengt

!l!!U!

trav

using exten

If

the

man-earried

ersed.

h and

range

There

reduction when both sets

vehicular operation the

mast

or

3 feet of the

the

antenna

and

ded.

of

is,

when

base

the
lead
metallic

eludes
the

M

with

together an d

·in

radio

S-(\()

radi

wire

object.<!

three

as

far

as possible.

mast

reoeiver and

and M

~l

o receiver and

into

the
Screw the binding
of

the

radio

si).ou

tb

Simple

el!ect

ld

be

·Mas

t baBe MP- 22,

e lateral distance

lIod

a

IM!C.'Ur'f!

set.

straight

between

Ine:rpenalve

PlOllnUllg

fr

om metallic

Antenna

sections MS-49, M

tntnsmitter

are issued as

transmitter

mast bllse

post

The

TM-176

wire

u!l9d.

and should

as

l8I<Ued.

Ilttlnp

without

the

wm

bolt

would

modllleltloo

part

BC-322. Screw all

making sure

into

to connect the antenna with the

be

secured to the binding post OD

not

fit

boles

be

OOdy

panels and

other

equipment RG-67, wruch

S-ISO,

BC-222.

of

and

mdio

M~l,

Two

set

mast

SCR-191\ f

is used with

mast

that

ins

ulator

ItOme

In

obtained

of t.he

the·mountlug

of

tbe

from local

all joints are

IN-96-A

newer

veblcles

plate

repair

mast

bate

on

Is

uot

or the

large

in·

sections

or

use

sections

tight.

the

top

set

mast

~Bwoe

su

itable.

s.bUpll

to

vehicle.

(

,

26

Or.

,",I< "

UNIVERSITY

Of

C/o.lJfORN

lA

I,

RADIO SE

TS

SC

R- I

04

A.."'ll

SIOR-ll1~

Till

11-

•

238

base
W- l

MP

2(l

-22 and

or

W- 9 furnished with the

The set-up must

to

binding

be

checked to determine thllt

flO"t

TM

-1 76

!le

t should be used for this

011

the radio set. Wire

pllr~.

the

wire

i~

of

the

rig

ht

length. With the set in operation,
o

ut

the

quency end of the band , or
short; if the howl

entire

range.

occUr!

If

the

Il

t the high frequency, or upper channel end

(

rl!Cfli,'e

low

er channels, the lelld is

27

turn

r tends

the lUlling control through-

10

UNIVE~\lTY

Of

howl at the low fre-

pr

obably too

CAlifORN

IA

TlII

11

238

0-"

of the

band

the

ened securely

vibration
high

fnlquency

after

MGN'AL

,

lead is probably too long.

in a manner

ita

COIi~t

and

great aensitivity

serving to

location

CO

RPSo

has

of these sets , interference is
to be experienced. from motor ignition
ances. Vehicles

with

properly

10.

Servlee.

with. re '8llDable care in h

service.

Keep

periodically

Loose

troubles.

and

broken connections

The

in

which seta

maintained

-a.

These

ignition

rad

andling

the equipment clean

to see

that

9CI'IIWS

are

sets

must

be

are

to be operated should

shielding or s

io seta

and

are

operating

and

and

sometimes the source

inspected

The

protect

set

it

against

should be f

shocks

been determined. Due

and

other

uppr

designed

electrical distu

be

provided

essors.

for

field use

will give satisfac

ch~

nuts

k

all mechanical fittings

are

tight

regularly

and

if

uninterrupted

in

of

operating

ast.-

and

to

the

apt

rb-

and

tor

y

place.

service ia desired.
using a
uaUy loee

!\!I

test

fa

coory.

minute!!
ordinarily

battery

their

set

I-M-A,

The

of

operation,

accepted

and
efficiency

battery

If

open leads

are

suspect ed, check

a small voltmeter or headset. Tubes will

and

or

interchanged

should

and

standard

if

should

be

ch~ked

any

the

part

battery

be

tested

with

tubes lrnown

under

indicates

should

with

load

II.

voltage below the

be

following voltages may be considered the minimum

performance:

AN-30-B

and

and
must
head.

for

dry.

nut

at

be used in removing
and

cleani

ng

3.6

M,

2.0 A,

M"6

To

likely to become corroded unless they
clean, disa ssemble

one

end

threads are

the

rods..

10

.8 C, IHI

th

e sections by rem

B.

and the three screws

not

Do

and

damaged.

not

repllU:ing these screws so

TIlle

U!lfl

oil.

The

Antennas

at

th

e other end.

fine steel wool (No. 0)

inside may

the

circu

it,

grad-

a test set, such

to

be

sati

s-

afte

replaced.

for

AN-~B

are
oving

r seve

ral

The

satisflU:tory

and

kept

clean

the

cap

Care

that

be

cleaned

the

in

the

rifles. I t is eJ:tre

inside

e

ffi

ciency.

h.

provided
as

th

same manner,

using

Dlely important

an

d outside as corrosion

The

mast

and

base

on

MP-22

the

cam mechanism.

e handset, headset,

a small swab such as used

that

of

these

the

antennas

joint<!

will reduce

be

in

kept

requires occasional oiling in the oil

If

or

microph

any

one becomes wet

of

the

equipment

it

clean

dean

their

cups

such

should

ing

be

thoroughly dried.

11.

storage.-If

the

setll

are

to

be

out

of servioe f

or

seve

r&!
months the following precautions should 00 observed: Clean thor­o

ughly

A vacuum cleaner hoee

dirt

aeldom

the outside

out

of

the interior. Compressed.

that

and

dry, clean

inside of the

may

air

be

used,

can be obtained

radio

if

available, to

sir

receivers

should

not

and

and

transmitters..

take

be

dust

us6d.

the pressure

and

It

is

may

{

t ,

28

Or

•.•.

UNIVERSITY

Of

1<

..

C/o.lJfORN

lA

TlII

11-238

RADIO

('AU/j(!

tiODB

in

batteries, may

The
inside bags BO-l1

damage

with

to

the

petrolatum. Detach

a dry place and protect

be

stored in chest

radio receivers and transmitters (leas batteriee) may

&8

DETAILED

RadIo
Ra

let

~R-194

dl 0 ""t SCR-195_ ____

12.

Badio

__

_____________

.et

SCB.-l94

__ _ _ _

SIllS

8CR-

IU

AND

SIM-U6

equipment. Cover the ends

it

from

a protective

SIICTlOIf

}'

UNCTIONING

___________________ __________________

______ _ ____ ___

.---o.

the

CH--38.

batteries. Store all equipment

dust.

Other

Store batteriee &eparately.

me&8Urfl.

III

OF

___

_ _ _ _ _ _

Trannnitting

PARTS

___

__

(figs.

11-18

of

steel

mast.

equipmeut,

be

Pa

_ _

___

____

_ _ _

22

and

1IeC-

uoept

placed

......

_ _

____

24).-

p11

12

IS

(1)

~t

lator

is

General.-ReJay

to

function as a transmitter.

of

aud
the

the tuoo VT--33

Hartley

BK-IO

type, modified

actuates the contacts which enable

The

as

the

so
radio-fnlquency ground potential.
C, is
tion adjuster.

grid-blocking capacitor and
rents in

the

La.

ment
from

to

i~

the

filament

La

and
the

tuning

the

plate circuit.

to

capac

R.

and

the radio-frequency potential

is a radio-frequen cy choke carrying direct c

isolating the

ground.

L,

·the antenna, which

not

tuned

or

resonated

itor'and

R.

are the

C.

fi]

ament. which is

C.

acts

C.

transmitting

!!erves

as

and c,. provide inductive

is

a half-wave voltage -fed system. The antenna

at

each operating frequency,

tube VT--67

modulator.

that

The

the

plate

tuning

eerves as the u-immer

to

bypass radio-frequency

!!erves

The

oscillator circuit

is maintained

inductance is

grid

leaks. C.

as the oscil-

or

calibra-

is

a coupling capacitor connecting

at

the

at

radio-frequency potential,

center

urrent

and

of

the

to

the

capacitive feed

but

is tuned

the

at

La.

the

cur·

coil

fila-

to

a

point

fairly efficient coupling throughout

within the normal range of

the

the

(2) Modulaticm.-The Heising (constant

ulation is employed.
transfonner.

passed
ing

• An

maouiaClllred

of

the

00

the

the

.-1,-lng

powu

through

5--6

are imPN

teona

rotor

top

mtot

eet IDIlJ'

0 0 a gt,-en c

Input

plates

to

Voice currents eet

winding 1- 2, and the stepped-

W"

couplIng

ane!

not

the

wIth

plate. U coupling

oectllate

the

I.lIteDna

1...

is

erI

on the

ca

padt

adjustment

~

ballDe]

o.

at

the aune

.

1II'1Jl

to

not

the modulation reactor.

up

grid

C.

II

should

the

It

be

of

Iccura

oot

stator

II

IDclee.lIed

frequeDCY

tbe coupling

obtslned.

coil.

range

The

feed circuit provides

of the coil !let.

current)

in the

mi

crophone circuit are

up

voltages on wind-

the tube VT-3S.

tely

be

platee

adjul

dIsturbed

IIlndlcated

beyoBd

I,

led wben

for

deermaed,

.

ibis

botb

The

system of mod·

T,

is the

R,

tbe

proper

by

a

optlmom

tra~mlltlng

the

input

eerves to

..

ts

Ire

poooltlon

po:oncll

n>Ulmum

line

polDt

aDd

..

Or.

,",I<"",

UNIVERSITY

Of

C/o.lJfORN

lA

• •

TM

11_238

..

redu
Cn are

ce the microphone c

b.

Receiving (figs.

bypass capaciwrs.

22

SotGNAL

urrent

and

25).-When

to

COR

the

PS

proper value. C., C., C

the

ceiver, the relay contacta are in the nonnftl

Tube VT-67

ac

t.s

as a detec

tor

and

tube

VT

-33

'v-"

•

or

!JI!t

functio na as II. re-

nona

8.8

dua

the

ted position.

amplifier. Tlut

, and

u

•

Fla

il

N",E._Uead>oet.

T-

24-A, l'-24-B,

..

22.-Radlo
IHI_22_A,

T_2~

APPARATUS L£G£N[)

.--I~.r

1111-22_11. ODd HII-2Z-C

'f_24-D. T-24-1i:

.od

ttonomltt<>, B

...

...:I

T_2

c...U2,

..

re

I

4_11"

ore

..

b_

"te

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IIlIe ••

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bu

o_

....

".,,'7

",.

)U

bl

..

eropb.

,

,_

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UNIVERSITY

Of

1<

..

C/o.lJfORN

lA

'R

ADIO

SM'S"

SCR-IH

AND SCR-

IUS

TM 11

..

-238

detector operates

the

of
20,000 cycles

proper

value

pe

in

a superl'(!W!nerative circuit,

to

cause blocking of

r second. R.

voltage on the detector in

rectified

current

in the

plate

in

order

circuit is passed

R.

and C, being

the

grid

at

approximate ly

the BC-222 gerves to reduce plate

to

minimim

receiver radiation.

through

winding S-4

The

:--

,

,-

'-

11'1

0""

N~_-

IDlet.ban_bl

Ilndotto

23._ R.dIO

TlI-ll-A.

•.

ApPARATIIS

-..!n.

TS-I1~B

LEGEND

aDd

tr.llOmltt~r

,

TII-II-C,

B

C-3

TII-II~D,

31

22

••

cb

TS-U~E.

.....

tlc

TL

dl..,..",

&lid

T&-1l~"

.t~J

.

....

Or

•.•.

UNIVERSITY

Of

ClillfORN

1<

..

lA

TM

11-238

STaN At.

CO

RP8

"

of

transformer T,.

grid

the receiver

cu

of the amplifier.

of

the handset

rrent, and capacitors e

Capacitor C. serves to bypass radio-fr"quency currents.

Th

e amplified signal voltage is

After

..

IIm

or

and

plification, the signal voltage actnates

headset.

C"

serve

R,

acts to reduce side-tone

as

an

imprew~

audio-frequency filter.

on

Tuning

the

for

,

reception is accomplished by means of coil L, and the variab le ca­pacitor

o.

small
base of
a small radic.-frequellcy voltage to the elec

Co,

the

SlIme

MS

in

transm itting . .

Oalibration.-The calibrator consists

vertical

the

rod

set),

antenna (mounted on

lind

the

small switch

32

t ,

8,.

Or,~,

UNIVERSITY

of

and

The

trod

Of

the crystal

CX,

insulated from the

rod antenna applies

es of the crystal.

.11<

..

C/o.lJfORN

lA

the

The

T.I[

11-238

..

RADIO SETS

frequen cy of this a

by

the set, When the fnlquency

the odd

multipl

pp

lied voltage is the sa

es of the fundamental frequency of the c

SCR-lIIi

app

AND

lied

SCB- 1II6

me

as

that

co

incides with

being

anyo

rystal, th

"

radiated

ne

of

e

4II1l12'

__

f2

D

Or.

,",I<"",

UNIVERSITY

Of

C/o.lJfORN

lA

Tl[

11-238

Ii-I

crystal
causes the decrease in the

S,

short-circui

of

voltage

tal

are indic ated on the

agree

Cau

care

assembly screws

cover

13. Radio

the

is id

...

oscillates

to

the crystal.

with

~ion:

should be taken when replacing

of

radio receiver lind

ent

the

relay

ical

sharp

If

set

with

and

ts

the

for

of

BK-IO.

crystal

decrease in the ru s

any

the

SCR-195

that

absorbs energy.

reason

crystal holder does not make contact

of

9l0NAL

rush

dial

tranmnitter

ing

electrodes

The

scale by

(figs.. 23, 24,

rad

io receil'er nnd

noise hellrd in the

severa l

the crystal

CORPS

This

Rnd

harm

rOO

it

BC-322 of ra

lines. These points shou

hing

is removed from

to

be

and

absorption of energy

prevents the applicatioll

onic point:a of the crys-

noise (see par. 7b).

sure

25).-The

tran~mitter

l'I:lCeiver.

that

the seal on the

dio

iUi

with

function

set

SCR-

BC-222

Switch

ld

socket.,

the

of

195

of

the

rad

io !let SCR-t94.

ment different; the

transmitter
is not included in

voltage being applied to the plates of
the audio-amplifier tube in the

Jl'requendes

rrequendea

Pam

mitter

UBt______

14.

Frequencies

BC-222.

BC-222) used to reduce the

SUPPLEMENTAL

aud

dIal eettlnga.

and

dIal /JIettlnga.

____

-

2O,OOO-o

radio

___

and

Wit

In

only one

hm resistor

receiver

SECY'ION

.,.dlo

.,.di

o receIver

___

_____

dial

h 400 kilocycle

_

and

latter

DATA AND

~h'er

__

__

___

settinga,

particular

tl'1lnsmitter BC-322, the

case.

IV

aud

__________________

separat

is

the

(R.

plate voltage

both

t.,.nemmer

eud

radio

in

ndio

the

PARTS

tr.""mllter

receiver

ion

there

circuit

receiver

on

detector tube

LIST

00--222__

80-322

are

arrange

the

__

and

detector

P.·

___

__

__

__

____

62

channels

....

__

__

trans-

-

and

Sfl.me

and

Ub

14

15

16

Ilvail

~-

L _________

2_. ________

3_.

4 ______ •

t>

6

7 __________

8 ________
9 __________

10

.hle

a.

With coil 0-

,-~

-~

____ . ___

_._.

_.

______

_______ .

_______

using coils

___

__

__

17.4

(

....... ,0100)

""-

",

,.

,.

,.

'"

"-

..

"

..

..

31

. 30

'"

C-

114

, marked

10

1'-

12

..

50

30

10

..

50

13. ________

U _________

I:L

16 _________
17 ______
18
19

20 __

and

C-

A.

,-,

-~

________

___

___ ___

________

___
_________
___

__

___

_

_______

175 as follow

(-

..

--

~)

-

..

.

10

3 •

..

3.

50

3.

..

30

'"

10

"-

3<

..

3<

50

..

.

30

'"

"-

s:

,-~

l_

D

U"''''''

21.

________

22

____ _

23 _________

24

_________

25 _________

26

____

27 ____

28 _________

____

_____

___

(!';7'l''')

__

..

10

..

"-

50

"-

..

30

'"

".

10

".

3S.

..

3S.

'"

t ,

Or,~,

UNIVERSITY

.11<..",

Of

C/o.lJfORN

lA

b.

Wil~

coil

C-1

.

RADIO SETS

75,

...

"rJ:~d

B.

SCR~ltH

AND

seH-HlS

T1!I[

11-238

1

...

16

C

haa

mm

..

_

..

l

....

-

1_..,.cIoo

)

,-,

.=~

I,=::,

,~~

.=-

1,= ,

- -

24._.

25 _______

26

27 _________

28. _______

211 ___
30

31
32 ________ _

33.

34 _________

35

______

__

____

___

_______

___ ______

____

______
_____

__

_______ _

_

_

_

..

90

.,

"

S7

.

,.

"

,.

"

..

90

'"

,.

.,

,.

"

••

"

.n

'"

• n 90

37

. ________

38 _________
39 _________

40

. _____

4L

. _______

42

_________

43

_________

44 _________

45 ________ _
46

____ _____

47. ________

48. ________

___

,.

"

<2.

'"

••

90

..

.,

..

"

..

"

<0.

'"

...

90

.,

..

"

..

"

60 ____

5L

52 ______

53

____

5,'-______ __

1l1i

_________

56

____ ____ _

57

__ __

118

__ _______

511 _______

61'- _______

61.

___

__

______

________

___

___

__

___

__

__

__

_

'7.30

".

"

..

"

..

..

90

••

.,

" .

".

"

..

"

..

50

90

'"

.,

" .

"

B6

•

,

_________

".

".

"

4IL ________

"

••

'"

..

90

62

_________

".

,.

"

"

I

-

15.

mitter
channels available as follows:

.

Cb

.=M

L

_________

2 __________

3 __________

4 __ • __ _ •

5 __________

6

__

7

______

8. _______

9. ______

10 ____ _ •

11.

Frequencies

BC-322.-With

.......

__

•

• _

____

. ___ •

• _

__ .

__

__

__

__

._

•

•

,~

(

___

--

and

-

J

- -

,.

90

30

'"

'"

"

".

"

M.

oo

90

.,

"

"

"

"

on

"

..

'"

..

90

dial

WO-kilocycle separation

,~

.=M

12 _________

13 _____ __

14 ___ ______

1"

__ . __

16

___

lL

_.

18. ____ . _

19 ___

20._.

21. . ____ .

22.

___

settings, radio

....

-q

-----

--

"7.30

".

,.

___

__

_

..

______

__

. . . _

__

._. ___

__

..

_.

__

_____

,.

,.

..

60.
60

60.

6L

"

"

'"

90

.,

>0

"

90

'"

..

receiver

,~

Dum_

23

______

24 _______
2" ___
26_ . ___ _ • • _

27

28

29

30

31.
32 _________

33

••

. _______ .

..

_. ____ .

_.

___ .

___ • _____

________

___

______

and

there

•••
._

_.

__

__

.

trans-

are

33

~-'-

".

"

".

..

"

"

..

90

63 .

..

..

70

6<

>0

M .

..

M. 90

..

70

"

"-

16.

th

e radio

general

the following list

Part

s

list.-

set.!;

catalog is controlling in regard to these component parta,

SCR-194

The

is

given for information:

following l

and

t ,

ist

const itutes the major

SCR-191S.

35

UNIVERSITY

While

Or,~,

.11<"",

Of

the

C/o.lJfORN

lA

i~ms

Signal Corps

of

TlI

11· 2

1

6-17

38

81GNAL CORP9

ROK--liol

----------

2

_______

--

----

L _______

3.

____

L

______

,

L

______

L __

__

L

____

..

_--_

L ______

..

__

._--.-

--

----

L _______ .

L

__

---

------

3 _________
3 ____ . _

25 f

eet

---

._

._
..

....

._--

..

----

. • __

___

___

__

-

_

••

..

. _

..

_.

..

_.

_-

__

-

_

ROB-lie

1.

_______

----------

2 ________

1.

_____

3 ____

2

__

1.

______ _

1.

_._. ___

___ . __

L

2

__

-

---------

L __

2 __
2

__

-

------

.--

_.

L ___

3. _______

3

_.

feet.

__

____

• _____

._.

__ .

___

_ .

__

••

__

•• ____

-

--

__

._-

..

__

____

__
__

"

Ad&pter
Antenn&

Antenna

S

Battery
Binding

B(}-71 ___

..

BX-13

...

Ch_

.

Co",

Hanw...t
He&doet

M_,-

Mast
Mast
MicrophoDe

Radio
Radin

"'''''

"'''''

Wire

.-

80-52

AN-29-B

AN-30--B'

BA--32

JX*t

CH-33

CD-

"""tion
"""tion

W- I

l

TS-II-E

HS-22

receiv~r

receiv

VT--'<

VT-67

2fi

______

_____ ___

('

TM-17I

_______________________

_______________________

~

__________ _____________

- B , __________________

MP

- 22_ • ______________ "_ _

M

S-SO(1

M8-51

T- 24--E , _. _____ •

and

er

&lid

U

'"

U

W-

'"

"'

____

,

U

('

"~,

L __________ •

."

, __________________

U

t .... n!!Dlitter 8

tranemitter

"~,

~,

II

_____________

__ __________

m

"~

in

uoe,

___

_____ ______

Ip&nI) _____

3

In

UJIe,

In

UIH!

2 1pe.re) ______ _
2 epe.re) _

epare)_

,

•

l ep&"")

___

18p&"") __

,

"p&nI)

•

_______

0-

222_

B0-322

__

• ___
___

__

__

--

_

_

_

S_

IBIU

."",ber

2B611(
2B822(

2BI62-f (

2Z252

OAm

2A230

2U71

3A32

3Z276

2Z11l3

3"033

3Ellll5

)
)

2A2082
2A2360
2A2lJli1

)

2C5222
2C5322

"'"

"'''

or

'"'

,,V,

....

AN_lIt!IUIJ

....

and

...

AN

'

.1.

,,_

• R

.... _ TII-ll_

H

...... ' HII-D-A

•

• MktOj '

Pu1'p(H

Sellin&"

Oper.tln&

Removing

Detall~

Pam

...

N

..

____

up

and conneeth,g

___

from Jlen-l""__ _ _ _ _ _ _ _

functioning

I

IIL___

17. Purpo

t.

...

...

AW_~

....

_,

.&.

, T8-11 _

...

-r--:M-A.

boUlUtod

bo

...

botilOltod

lI.

TlI-ll..(J. TlI-ll_o.

HII-B-C

T-:M-B. T-:N-C. T-:M-D. or T

....

).

......

' bo

lor

""_

N-IO-B

..

_",tod

Sf:CTION

REMOTE OONTROL

__ ______ __

__

__________

________

se.-&mote

_____

__

of

po.

__ __

______

______ .

____

rl.

______ ~ __

___

__

____

___

~__

____________________________________ 18

_ _ _

_____________

control equipment

.&.N_1fI-B

(DO

..

T8-11_'

...

-:M-'

(an_

AN-«I-A

ma,

_

..

, H

....

,

V

boo

bo

II-

t.

EQUIPMENT

_____

__

______

___

____

__

___

_______

____

_

__

_______

_ _ _ _ _ _ __ _

____

__

__________

RC--66

"'N-S-C"

_

",bolLWtod

D-B.

..

bltllOltod

____

_

________

__

__

___

__

__ _ _ _

___

___

____

_ OIIltabio

-=od).

...

b

..

· I

...

"'k-ropboM

RC--66

P

____

..

____

____________

____

__ _ _____

___________

____

_____

is used with ,

___

tlr'~"

TlI-II_B

'r'4I-B.

qraplo

__

but

.

17

19

20

21

22

i.!l

n

ot

part

of, radio

set.!!

SCR-I94

and SCR-196. This

is designed w make possible the operation

and

remote control

ponents

coupling

housed in a rugged metal box.

SCR-196

of

a telephone

tran

by remote control over telephone lines. It includes

unit

sformers,

RM- 14,

EE-8

swikh

t ,

v.-hich

(e

contains all

xCflpt

, batteries,

Pr

ovisions are made for s

36

UNIVERSITY

the

ek

Or,~,

eq

uipment

of

rad

io aets

th

e essential com-

SCR-I94

handset) together with

., f

or

remote control,

v.-i

khing

.11.-"",

Of

C/..tJfORN

IA

TlIII:

11-238

17-19

the

as

in case

inches

radio

for

18

.

set from
transmitting
CS-76-A

and

weighs

Setting

for

up

re<X!ive

and

shipment,

13

pounds.

and

oonnecting.--a.

tions for operation on a

switchboanh
remote s
button

witching

grounding

provided.

such as BD-71

of the radio set from

switches

The

switchi

ng

on the telephone line.

switchboards such as
repeating

the

cont rol

that

the control line does not pass

coil.

There

equipment

BD-71

may

and

to

transmit

receiving.

the

at

the remote

When

equipment measures

Figun:l26 shows

ground

or

n:ltum,

BD-72. In

re<:eive

SW-

158-A

and

is accomplished

Thi

s operation may be

and

be more

the remote

BD-72, ezcept on lilies

than

controlling

through

dismantled

and

if

order

to

ground

through

station,

and

10

desired,

to provide for

transmit,

rods

a simplex

carried

as well

packed

by 8 by 7

the

connec-

through

push.

GP-30

circuit

through

having

are

a

on6 switchboard between

telephone provided.

a

repeating

coil on

any
switchboard . Care should
One

be

the radio.

ground

unit

thi

This
passes through

h

tion

A'round
on

A

ground

provided

connection

RM-14,

rod OP-30

and

for each telepbone which

If

trouble is encounten:ld

to

work

an

eztra

battery

s circuit. (800 par. 21a.)

b.

Figure

27

shows

the

connections

method of operation

a switchboard, since thfl

old

th~

switching relay in the control

(see

stake or

the

tell"phone is closed as for common

jumper

par

. 21b).

must

Wh

push button is noceasary, provided

be conllected between the L.

en telephone

be

tak

en

one push

the

switching

BA

cannot

to

get

button

in

& good

switch

may

have occasion to

obtaining

relay

ground

SW-

connection.

l58-A

operate

a sufficiently good

in

the remote control

must

-2 may be conveniently added

for

operation

be used when

drop

unit

EE-8

on

the

in the

or

battery

and

with a line

the

telephone line

return.

switchboard would

transmitting

EE-8-A

the

is

screw switch

posi-

used, no

telephone operation.

OND

terminals

in

of

the

switch

depl'l)SS
transmit,

switch

way

mote
o

on

rem

ote

the

the lever switch on the telephone.

NOTa-

be

19.

TbIs

mU

lt be

rullii'.

Operating

operation as shown in figure

peration

the

control

the lever switch

corresponding

THROUGH

control

radio

IB

deprtlled

set

the

unit

nl1'ertle

.-

unit

RM-14

(see fig. 28).

RM-14

frolll

wheu

With

to complete

trsnsmit

must

of

the

the

to

. These

be released.

tbe

telephone II

control

the three positions

to receive,

uoual "pulIh

equipment

26

or

27

are

TELEPHONE,

37

the

To

not

,

switching circuit.

it

is necessary only

switch from receive to

to

talk"

In

uae

there

circuit.

flO

tbat

connected

are

of

three

the

The

the

telephone

for

modes

lever switch.

RADIO

To

to

lever

re-

of

,

li.nd

o.,~,

UNIVERSITY

.11<"",

Of

C/o.lJfORN

lA

/--.......

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r

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SW-/58-A

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or

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r

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TL-J/72

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IU

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1111

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GP-.JO.

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when

wllb

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14-C,

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HS-2h9

r~p/qcl!d

used

T

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U-P.

..

with

Ia

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T- U -

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ond

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a

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t

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11.11

.... _I

.

0 -

--

~

T.II[

a.

11-238

,.

When the switch is in the

SJONA!. CORPS

TELEPHONE

position, the

unit

is

operated
SCR-IH

strictly

, the switch button on microphone

on handset

TS-ll

as a telephone.

If

equipment is used with radio set

T-2f-E,

- E performs the same function

'''''

.... an

&8

the

or

the

switch

lI'II'ikh on the

handset

TS-9

in

tdephone

control equipment set

radio set

o.

When the switch is

oonn&eted.

SCR-l94

from

the

and telephone

telepbone line and is connected directly to

EE-8

up for

in

the

t ,

or

EE-8-A.

operation on

EE-8-A

RADIO

position, the

UNIVERSITY

ground

.

Or.

,",I< "

Of

C/o.lJfORN

Figure

return

operator

lA

29 shows

circuit

is dis-

radio

the

with

set

TM

11-238

SCR-IIU

or

SCR-19/1

RADIO

SETS

whi(!h

SCR-1II4

is

operated in

Al."lI SCR- 1II5

the

usual manner.

ringer is connected to the telephone line and may

remote telepho

c.

With the swit

radio

set

is

ne

or

switthboard

(!h

in

the THRO

fed to the tf'le

ph

nn('

on the line.

UGH poeition

line anll Ihl' signnl from I

/?II(/I

()

s.!

.$&1"'/94

be

tJ\e

rung

output'

h('

"

from

of

line is

The

the

the

.$a·,~

"

fed to

transmit

remote swit(!hing circuiL
sccomplished
Th

e radio operator (!all hear a

a

lt

hough he cannot

the

rad

118

described in

by

io set.

the

f"adio

talk

The

paragraph 181'

cannot

on

(

radio

be

opef"ator

ll

the

line.

set

is changed from receive

or

b.

When, for any reason, the

established, the switching may

by

pressi

IllCSillge6

UNIVE~\lTY

ng

his mi(!rophone switch.

both way6 on the line,

Or;gtr

.Iff..."

Of

CAlifORN

IA

to

be

TM

11-238

90

21

SIGNAL

COR

PS

20.

signed with three

con

for t
opposite t
ground rods
tween

MC-222, which is sim

to

Removing

pocket.!!

lro

l equip

he

remo te control unit

the

be

ueed immediately , t

ment

he

snnp fasteners, is intended

GP

--30

two above·mentioned pocke ts is

from

R

c.oo

servl

or

when not in U!IIl.

ce.--Case

CS-76-A

(fig. 30) ia

compll.rtments which house the remote

R:M-14.

The pr

A second pockel, on the side

to

pro

incipal pocket is

vide for

car

rying

and switches SW- lIiS-A. A thirrl pocke t

to

ilar

accommod

10

figure 26. When the equipment is not

he

two

batleri

es

BA

-30

and

ate chart

the

b!llt

de·

be

-

e

r ~

'

BA

-2

must

f'O!:li

on

cor

21.

SUJitching

grnm

wi

of the switchi

th

that

switching c

side
For

of

simplicity,

of pll.rI/l

Detailed

tm

part

ireuit

the telephone line indic

mote control

be

remo\'ed from th e remote control unit

II.nd

functioning

ground return circuit (par. 1

of the cireui!

is shown in figure

plug

unit, whi ch mu

ng

s,

wiring.

cireuit

8OC

kets,

of

parts

of

remote control

of

telephone

32.

lI.te

st

II.

nd

be

the

in t

path

the

he

(figs.

31

8a).-

unit

EE-8

The

solid lin es and the L I

of the switchi

a-positio n switch on tile re -

THRO

UG H position, have

tL

l'1l7

to

pre\'enl

, 38, and

39

A functional

RM

- H , together

which

B.flecl.!l the

ng

current..

).-a.

dia

-

been omitted.

It

c

an

be

!;een that

the fu

Or

UNIVE~\lTY

nction

... , •

Of

If,

CAlifORN

'"

of

IA

th

e switching

TJ(

11-238

current

BK

-24, which in

SCR-IM

in the telephone line is to operate the remote control relay

or SCR-196. The relay

as the switch on

in changing over

L.

side of

seen

that

the

the

line

remote control switching meehl.llism will not operate

RADIO

the

th

has

tUI'n

SETS

closes the switch

SCR-I94

microphone T-

e radio !jet from

capacitor

CA-l77-A

AND

BK-24

24-E

transmit

ing

or

unless the same side of the tele phone line

tenninals on both the telephone EE--S-A

control

reverse

unit

RM-

I4.

.

If

the

unit

the line terminals either

does not opera

at

the telephone

or

unit.

Non:.- Do no!

term!nals
11\1' cl..,ult

at

..

ronll"'"

telepbone

111 Loa

d the

the

....

liE 8 or

modulaUon

It~

b

loiE

SW

- lIl8-A

goA,

ct..,ull8.

.Ince

bet

..

under

and

SCR-1II6

circuit in

acts in

on

the

to

the
handset

receive.

in the circuit,

.is

connected to the L.

EE-8

een

tbl'

1.-

te

Il'OUlld

and

as first connected,

or

at

alld

rondIUon

In

..

ol~

21

ra

dio set

SIlme

manner

TS-ll

Since the

it

can be

the

remote

the contr61

tbe

t..

the

...

curTent

-E

cw

lteh

..

1..

-

Ul

......wt

the

~und

the

at'fOllll
Ire

line
following change

(Bee

BAT

AUX

SII01l'U

b.

SWitching

termInal.

ro

nnectioll

the

mlly be

dr.

GND

AUX

hI

do

used

82).

at

leI'mIna'

BAT

tled

withOlJ,t

s:

Al

..

ays

ron..eet

The

UnN

....

remote

alld

termina

In

Iteblng

roDtrol

l..

ftcure

good retuMl. (par. IBb).

as a switch

the

.oltsill

addl.,..

The

82.

ing

return

....

unIt

an

auxllla..,.

(1) Tum the screw switc h of telephone

common batte

(2) Remo

the

renwte con

(3)

Connect

remote control

ry

(CB) position.

ve

the

trol unit

II

jumper

unit

ground connections both

RM-14

.

between the L.

RM-14..

Ltch

RM-

8W

- lr.&-A

ma,.

aUI lUtll'7 ,

be

14

tN:>m

balte..,.

instead

EE-8

at

and

GND

bet1l'_

Inerealled b,. mo ..

the

GND

..

Itcblnl

and

ll'Ound COIInecl:lou.

-Th

of

e L, side of the

the ground by

or

EE-8-A

lround

l",

terminal

balte..,. BA.-2

to

the telephone lind

terminals

of

and

the

to

the

the

at

the

The

same

set

set is
and

from

figure

c.

EE--S-A
or
ringer,

lever switch on te lephone

manner

is switched

as switch

to

switched f

EE-8-A

L,

to GND on the remote control unit.,

which affect this

32.

Tromm

SCR-196

generator

ie,ion.-

(or

EE-8)

is shown in figure 38.

, plugs, etc., in

be seen in figures

remote control

unit

EE-8-A

SW

- l58, eJ:cept thllt when

the

or

receiving position, an d when released, tbe rIldio

trllnsmitting. Those

type

The

to the inp

path

of the voice

ut

trans former of

the

22.

28, and

RM-

I4.

31.

and

the microphone

..

(or

EE-8)

parts

of

operation and also

of telephone

are

now acts in the

pr

es:ed, the rfldio

shown

current from telephone

rad

io set

For

simplicity,

circuit lire omitted.

Alt

ho ugh

th

e ts.lking

battery

the

dotted

SCR-I94

an

switches,

Th

ese may

battery

of

the radio

EE-8

jumper

in

of

Or

•.•.

UNIVERSITY

Of

'"

..

C/o.lJfORN

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CIRCUIT DIAGRAM

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CONTROL UNIT RM-14

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position.

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efl'ect

AND

on

aCR-U6

the

talking

current

91

since

ml1lli

•

d. ReC"qJtion.-Figure

receiving.

telephone line through
radio operator's headset

The

output

r+--------"

'------

34

shows

of

the

caplI()itor

(or

receiver) is

the

amplifier tube VT--33 is

0-

49

path

10 and transformer 0-280.

of

the voice currents when

also

UNIVERSITY

connected

Or.

,",I< "

Of

,

I

,

,

C/o.lJfORN

lA

fed

to

into the

the

output

The

TIll

11-238

mG~'AL

COR

PS

"

circuit of

switch , is not connected. For simplicit.y, various

a_position switch, whi ch

been

omitted.

the

radio

set.

The

must

mi

crophone, elloopt for

be

in the

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~~

THROUOH

~,

~.

:t;~

;~

r

~

~

,

~

"*

jrlll'

+

---

---

.,

parts

position,

,

•

i

i

-

•

i

•

-

-

"

,

0

"

,

-

,

,

•

"

•

"

•

,

"

,

"

•

,

•

•

-

,

•

•

•

,

•

•

•

,

"

•

•

0

, 1

, .

,

,

,

•

"

•

-

"

,

the

such

con

as

trol

the

have

,

,

'.

:~

,

,

,

"

~

,

'.

j~

~

0

•

,

"

•

"

i

,

-

•

",

• •

-

'i

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< ,

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,-

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•

--

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1'1

-

,-

•

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I,

• •

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-

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•

•

•

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,

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iii

r.

I .

~

"

e. Radio opIJ1'tltimJ.-Figures M an d 36 show

receiving circuits which are compl eted

switch

figures

to the

24

and

RADIO

25

that the same components are used in this method

position. I t can

by

be

'"

(

UNIVE~\lTY

Or",

the

moving

seen

.•

If,

...

Of

CAlifORN

by

'1

"

tran

th

co

mpar

IA

smitting

e a-position

ison

and

witb

TM

11-238

RADIO

of ope ration

trol

are

eq

uipment. Only the audjo-frequency

shown. Switching is accomplished by means of the

all

am

microph one T-24-E
manner

l1.li

described in

SE

TS SCR- I H AND

SCR-

used in communication witho

por

tions

(or

on hand

par

agra

ph

set

4a.

T

S-ll-E

if

I Q6

ut

the

of

,,-"

remote oon-

the circuit

butwn

used) in the same

on

f.

Ttl~phO'/le

opertltiM.-

Figure

37

sbOWII

completed by moving the a-position switch

posItIOn

the

be

seen from figure
EE-B
the remote control

22

equipment

.

Th

e ringer M

C-IS

line as shown reb'llruJess

37

01'

. P

EE-8-A.

am

list

that

Th

e locations

unit

.- 'l'he followi

the circuit is similar to

RM-14

RC-66:

Q.ollliIll

2 ___

4

2

1

4

_____

________
__

______

________

________

Battery
Oa

t.tery

BA

BA

Book, instruction, f

Case

CS-76-A

Ground rod

I lind generllt

of

the

call

ng

-2; 1

-30; 2 in

J>OIlitioll

of

the \'arious ]Jllrts which comlJrise

be

seen ill

items comprise

,4.,./ll'le

in

use, I spare

use, 2 spare

or

remote

GP-30

or

the cin;uits which are

to

the

TELEPHO

NE

GN-38 remain across

of

the switch.

that

fib'l'res

the

of

38

remote con

control unit

a telephone

lind

It

can

39.
tro

RM-14.

l

(

'1

Or'-ltr

UNIVE~\lTY

.Iff..."

Of

CAlifORN

IA

TM

11-238

..

QI<''''W,

1 ________

3

________

NOTL-Wlre

phone

JlUrpooIeOiI

81GlI.

Remote control unit

Switch

W_llo-

18

UIIed

n o.

to

SW

- I

othe

r ty)'Ie

eooneel lhe 1I111t1

' AL CORPS

Atildll

RM-

58--

A

furni

shed

to;\'tbe

14

to

•.

the

oT'l:a

nlKlltlon tor tele-

.... ",

P"'I)(!e __

SenlnlC

~raUng

I

kmo~lnr

P

am

II))

IllIt ______________

1

""u

....

_________

.nd

""'''''

________ +

trom """.

!lI'.-I '

AN

___ . __

'<:1.1''11

____

1""__

~'M'P

""nOTfll

TENNA

• _______________

_____

_

_________

________

___

_____________________

"nit

lUI

_H . ,'

SD;rIOS VI

EQUIPMENT

__

_________

• _ _

___________

_____

____

_

___

_________________

UNIVE~\lTY

1_..,

In'~rlor

R

_

-

----------

_ _

•

______________________

___

Or;g

...

Iff..."

Of

.

Id,

C-G3

---

__

__

______

CAlifORNIA

__

ollie.

---+-----

__

_________ 24

_ _

_______

_______

__

__

_

~'6

'"

zr

TlI[

11-238

113.

is not

and

packed in bag BO-93

Purpoae.

part

of, radio sets SCR-I94

&ADlO

-

The antenna

<!WIS'

for

1 foot by 8 inches, and weighs

distances by one man.

of the

antenna

poise wire laid

terminated in a

8-foot

i.e

so designed

half
pulley. The lower

radio sets (see

wire erected O\'er a si

along

MlO

sections of l%-inch wooden rod with metal ferrules. The mast

that

of

the mast is hoisted into position by means

it

half

It

provides a means

par.

thi}

~).

ground.

-ohm resistor unit. The mast consista

may easily

is supported by three guy ropes.

SCR-19.

equipment

and

AND

5(lR-196

RC-63

SCR-19~

2.Mt.

is used with,

.

When dilill1antled

ship ment, the equipment is 8 feet by

~7

pounds.

It

can be carried over
for

increasing the range

The antenna consists of a l00·foot

ng

le 3O-foot mast and an 85·foot

The

antenna

and

counterpoise are

counter.

of

be

erected

by

one man.

of

The

upper

a rope

but

short

four

and

24.

whenever possible in a cleared location so

wir
results

a.

stand

Setting

up

and

connect1ng.~

The

e will be free of interference by trees

will

lJas

fOf

be

obtained

e lay-rmt (fig.

if

the antenna ca n be erected in a high location.

4O).-With

a center, drive three stakes

the spot

GP

that

-2 into

form of a triangle, each one approximately

b.

Mast,

consists

MS-91,

Assemble
figure

41@.

metal colb.r on the
provided

Fasten

quy

of four

MS-

92,

the

Connect the

and

two

of

rope, and antenna

WlMmbly

sections which have been designated as mast sections

MS-93, and MS-94, beginning with the

four sections

top

adjust

the guys

the guys GY-34

of

the mast on the ground as indi cated in

t.hree

of

mast section MS-93 by means

guys GY-34 to

to

approll:imately tbeir correct length.

to

two

of

the ground stakes making

antenna should be erected

the

an

d shrubbery.

where the

22 feet from the center.

(fig.

mast and antenna

The

mast

the

41).-(1

th

e three ears

ground

)

Th

top

e mast

section.

best

is

to

in the

in

the

of the hooks

at

least one complete

ro

pe from slipping (see fig.

the

the
hook on one end

hoisting rope (guy

top

of

mast

SIlCtion

of

on the bottom of mast

of

the ante nna AN-36

MS-91 by means

lapsed,

mast.

secure

other
hoist the two

th

e free end of the hoisting rope to one of the guy stakes in the same

manner

that

se

ctions MS-9a and MS-94, raise the mast into position and

the

two,

as

is, with mast sections MS-91 and MS-92

third

Adju

top

the

guy rope to

st all guy ropes so

sections into place with the hois

guy

tum

the

of rope afound each stake

41@)

OY-3~)

M

S-9S

hoisting

. Fasten the pulley provided with

to the eye in the metal

with the hook provided.

rope

section M-92, Connect the loop in

to

the eye on the cap on the top

of

the hook provided.

its

ropes.

to tbe eye in the metal collar

With

the

stake in the same

that

the mast is vertical. Now,

ting

to

prevent

collar

Fasten

of

mast section

mast

lying

parallel

manner

the

center

fully col-

as the

rope, and secure

the

on

the

to

"

Or.

UNIVERSITY

,.,1<

Of

..

C/o.lJfORN

lA

TJ(

11-238

..

(2) Stl'\!tch

the
AN-31) is terminatOO

a stake through the hook fastened to the loop
AN--36

direction

&Jld

~

~,

out

of

also through the book fastened to the loop in

one-half of the antenna

transmission_ One end of the oounterpoise (a.ntenna

in

SIGNAL CORPS

a clip Ilnd

the

•

AN--36

other in a

•

~~

.

~~

iO

~:t

'"

"

'"

•

~

~

•

~~

.

~:<

~"

~

"

/

~

.,

~

U

~

in

the end

from

bal'\!

the

m-.st

wire..

of

antenna

the

in

P&SII

end

?

,

"

•

,

;

• ,

,

"

,

•

•

,

•

•

-

•

2

•

-

•

•

!

•

,

•

•

•

,

•

1

•

•

•

•

•

,

t ,

~

'\

"

'(,.

'"

'.

~

•

UNIVERSITY

Or.

,",I< "

Of

C/o.lJfORN

lA

Tll

11-238

of

the

wire

the
since this

194,

toward

binding

counterpoise (&Jltenna

(800

stake into the. ground. Avoid pulling the antenna wire t.ight,

which is

the

post marked ANT,

RADlO

fig.

41

(!».

will bend

part

stake

the

of

ju

SillS

Take

mast

antenna AN-37, along the

st

driver

SCR-

AN-37) which is terminated

up

eJ:oes!ively. Slide termin&! block

, and connect antenna AN

a.od

IU

the slack

the counterpoise (ILlltenna

AND

in

SCR-I9&

antenna AN-36 and drive

lU

·

in

I.

bare

TM-

oounterpoi~

-36

wire

to

the

AN-37)

• •

,

_

...

'"

I

i

e

--=

"

Or,~,

UNIVERSITY

.11<"",

Of

C/o.lJfORN

lA

:::.:.=:>

TJ(

11--238

llii

RID

SIGNAL

C'OJU>S

to the post marked
ohm terminating
in

the opposite direction from the mast, and

CPSE.

~stor.

Stretch the other half

Terminal block

on the ground below antenna AN-86.
hook fastened to

the loop on the end

through the hook fastened to the loop
41(D).

Make sure
the

stake

TM­322

the

case of the radio set by

Pull

the antenna

that

on

the other end

176,

connect the radio receiver and transmitter BC-222

to the end

tight

this stake

of

the antenna wire. Connect the counterpoise to

is

and drive the stake into the ground.
in line with the bottom
of

the antenna. Uaing

me&rul

of

counterpoise.

25.

19/1

Operating.-The

operation of

is the same with the antenna equipment RC-63 as with the

TM

- I94 contains a 5()()..
of

the &ntenna wire

Pass

of

of

layout

a stake

ant.ruma AN-86, and .190

the counterpoise

the counterpoise

GP-2

of

II.

the clip on the end

r&dio

96t

SOR-IM

through the

(!:lee

fig.

the mast and

binding post

or

BC-

of

the

or

SOH.-

antenna AN-29 or

end

194

cation

of

the antenna which

is

directOO

is

desired, because the antenna has

AN-80. Care must

is

terminated in the terminal block TM-

accurately

towlll"d

the station with which com.muni-

ticularly 011 the higher frequency channels.

be

taken, however,

great

The

directivity, par-

amount

that

of

the

gain

provided by the rhombic antenna over the vertical antenna provided
with the radio

In

generlll, the

on the readability

but
tions, a

amount of

readable signal will

ooIT'llHpo

decrease depending upon the position

tion. Maximum decrea

opposite

26.

to

that

Removing

sets varies somewhat with frequency and terrain.

gain

nding

for

to

be

e:rpected will

8CIlie

(!:lee

be

deore46

se

in readability

mll..II:imum

from

aervice.-The

be

of

the order

par.

41

, TM 11-454), that is, a poor

made fairly readable.

e in readability will

of

is

obtained in the direction

increase.

antenna equipment RC-63 is

of

one

In

other direc-

be

obtained, the

point

the remote sta-

removed from service

in

the

reveI"86

order from the procedure

followed in setting up.

Q.

DiSCQnnect

the

r&dio

receiver and transmitter BC-222 or

BC-

322 from the antenna and counterpoise, and pull the stake nearest

tho

reel RL-3, leaving the terminal block

...

o.

Starting

the wire.

with the free end, wind the oounterpoise wire on a

TM

-l94 on the outside end of

Di9COnnect

the antennn and counterpoise from . the

ter-

minal block, and pull the stake on this end.

c.

Loosen the hoisting rope from the stake to which

and lower the top

half

of

the mast. Unfasten one guy rope from

its stake, and lower the mast. Discon

of

the mast.

nect.

the antenna from

it

is fastened,

the

top

t ,

Or~,

UNIVERSITY

.11<..,.,

Of

C/o.lJfORN

lA

T1iII

11-238

RADIO

•

I:lI7l'S

8CK

- IU

A!Nl)

ecm-U6

.ill

•

!

~

~

•

-

•

i

•

,

,

!

!

•

,

•

• ,

(

"

UNIVE~\lTY

~'"

Of

CAlifORN

IA

SIGNAL CORPS

,

Coutlon:

age the nf

d.

Wind the antenna wiI'\l on another reel

Do

not

ast

section fittings

allow

the

mast.

or

two full reels in the large pocket

e.

Unfasten all guy ropes and hoisting rope from stakes
the collar
reel

This

RI

reel also fits

f.

Separate

by means

g. Place

bag

BG-93,

on

mast section MS-93, and wind all ropes on the other

3 provided, beginning

the

of

the four

,11

and

into

four mast sections and fasten them into bag

stakes into the compartments of

f&.Sten the cover of the pocket

the

large

straps

provided

teners on the oover.

h.

Slide the handle of hammer

the

purpose, placing

the

head

of the hammer toward

to

drop

break

of

bag

with

the

pocket

HM-l

freely, since

the

BO.:..ro

wood

(see fig.

mast

Rr,....a

this

may

seetions.

and

~)_

place

and

hoisting rope

in

bag

in

the bag.

BG-93.

the

with

(guy

GY-35).

center pocket

the

two fas-

into the loops provided for

the

end

dam-

the

from

00-93

of

of

the

bag.

Place

close the

i.

Fold

the

two

the bag.

;.

Starting

and

ment

fasten

27.

Parts

RC-63:

Ql'lI"mV

L __

1 ______

L _________ ______ ____________

L

_________________

L ____

1.

_________________

spare parts,

COVel'

the ends

straps

with

__ __ ______

_________

___________________

of

the pocket

of

the bag BG-93 over the equipment,

on each

with

the side

the three

list.~The

_______________

____

_____ . __

__

if

any, in

end

with

to the buckles sewed on

the

pocket with the two re6ls,

the two fasteners provided.

opposite the 6-ineh flap, roll

strape

and

buckles provided.

following items comprise the

Arlie

M8-I}1

on M
on M8--94

8-93

_______

______

....

______

__ BtIg

___

_ .

__

___

_ .MM C

__

JJO--08

Man

MIlII! JleCtlon M8-9'2

Mu!

Anlenna

JleCtlon

>teeU

tM!Ctl

AN--S6

and

the

up

antenna

'"

and

fasten

inside

the

equip-

of

bag

________________________

L _

I'i. ___

B

L _

8_

L_,_~_ ____________

__

• .

___

_______

____________

___

__

__

CARRIER

Pnlp(

Dellcrlptlon

EmploymenL __

, e _____ , _____ ~ _____

_____

____

______________________

• _____

_________

______________

____ ____

_____

__ _________

____

___ ___

____

SronON

FM...(I2

____

ee ____

ee

ee

_

___ ee

eeeeeeeeee

_ _ _

___

_ _ _ _ "

__

__

ee ___

__

_

Anlenna

Stllk'"

Guy

GUJ'

lleel

.Hammer

AN.....a. (UIIed

GP

-2

GY-3t

GY-&,\

RL-3

HM-l

VII

AND FRAME FM-33

__ ' _

ee

____ ee_e

_ _ _ ' _ '

___

_ _ ' _ _ _

__ e

_e _____

__

_ "

__

_ " " " _ _ _ "

ee

__

_ _

__

ee

e ___ e_e _

___

..

..

_

counl

__

,,

,,,__

eeee_eeee

..

rpol8e)

Pa"'fU.,1I

. ' _ _

_ _

28

29

SO

t ,

Or

••

11<"",

UNIVERSITY

Of

C/o.lJfORN

lA

TM

11-238

RADIO

28.

tended for pack

for pack artillery.
vices f
ers

PurposfI

or atta

FM

-32

ching

are o

.-

transport

rd

SVI

'S

SCR- l'i4

The carrier

of

radio

Th

ey

cOJL~is

to

a cargo type

ina rily used

AlN"

D

SOlI-I'i~

FM

-82
!Set

t

of metal frames provided with

ill

pairs, one on each side of

and the frame

SC

R--I94

Phill

ips pack.saddle.

and ot

FM

her

-33
equipment

The carri-

mall

are

th

e peck

in·

de.

~

~

~

"

, ,

" .

" .

•

0

•

!

~

,

-

,

•

-

!

,

,

I

0

•

•

•

•

.,

,

•

• ,

,

•

,

•

"

• ,

x

•

•

,

•

•

saddle, and
FM

-33.

29.

illch

Its weight is

e!l

Th

Description.-a

wide,

ma

yo

e

fnln

3~

II

\I

pounds.

r may not be

e

FM

-33

.

inches deep, alld

is

Carrkr /t',V....1:e

It

is (.'ons

used

for top

tru

"

(

in conjun ction
1000d

22

cted

ing (see fig. 43).

.- T he ca

inch

llll

high, including hooks.

of

six h

UNIVE~\lTY

wi

th

the

rr

ier [.'M-82 is 20%

ol-ro

Of

lled s

CAlifORN

teeJ

IA

i

•

•

•

•

•

•

,

fmm

pllrtll

e

,

TlI

11

238

..

•

•

. (

II

60

UNII'(lI<;ITV

•

,

."

Of

C.wfORN

IA

TlI[

11-238

RADIO

SETS

SCR-tU

AND

welded together. Two pieces, which form

of

the carrier, are extended and

fit over one
saddle

with

be

obtained

(_

the carrier FM:-32 are items

of the two metal bars along the top

fig.

44).

~

eparately.

The

The

straps

bent

into the shape of hooks, which

and covers which

of

qua~nnaster

arohes and

pack saddle are ordnance issue.

b.

FramtJFM

wide,

pounds.

and 4% inches deep, exclusive

It

-.'J3.-The

is constructed

frameFM-33 i822% inchefllong,

of

mounting feet. I

of

10

hot-rolled steel parts, including mount-

SCR-

part

bolUi

Ult.

of

the back structure

of

the Phillipe pack

are

ordinarily nsed

......

issue and must

for attaching to the

17*

ts

weight

inches

is

12

ing
pins,
frame

manta

it.e

arcl:Jes

rule for t
FM-33. Both are

feet, welded together.

are

ma

30.

provided for attaching the

of

the Phillips pack saddle (see

(cover)

of

quartermaster issue and must be obtllined separately.

and bolts f

whi

ch are ordinarily used with the frame FM-33

or

II.ttaching to the pack saddles are ordnance issue.

Employment.---a.

he

employment

ueed

Four

Uu

of

either the

to

carry parts

bolts, with nuts, washers, and cotter

in

pack "guipmMlt8.-There

frll.m

carrier

e FM-3B to the top

fig.

of

45).

The

FM:-32

radio set

stnp8

is

no

or

the frame

SCR-l94

of

fixed

the

and

are

The

in

various pack equipments, such as the pack equipment CE-{I (also

known
as pack, radio,
and

as pack, radio,

No.2)

pack

equipm

ent

menta CE-{I, CE--7,

No.1),

pack -equipment

, pack equipment

CE-

CE-9

lO

(pack,

and CE-tO,

CE-9

radio,

are

(pack, radio,

No.6).

not

furnished. as such by

CE-7

The

(also known

No.4)

pack equip-

'I

Or

•.•.

UNIVERSITY

Of

1<

..

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8l0:.· ... L CORPS

~

<

•

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•

• ,

•

,

•

•

•

•

•

~

,

•

;,

~

I

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,

I11111I1

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•

•

•

f

.,~

UNIVE~IITY

Of

CAlifORN

IA

RAJ)IO SETS SCR- I

g4

AND SCR- I

g3

TlII

11-238

......

the Signal Corps but are a
Artillery

for transportation purposes. (See T

rbitrary

groupings used by the pack Field

/BA

No.

6-3, appendix,

for details.)

b.

Loading

.-

The usual method of loading the carrier FM-32 is

as follows :

(1

) Plnce the

(2) Cover the

carrier

carrier

on

the ground, with the open side up.

with a pack cover (manta.), unfolded,

so

that

the cover extends approximately equally beyond the carrier on all
four

rime pushing the cover well down into the

folds

under

sides.

(8) Place the equipment to be loaded into the carrier,

carrier.

(4) Fold Ille pack cover over the equipment, making

if

necessary to take care

(0) Pass

the top

1"1'0

bar

or

more

straps

on each side of the

of

any surplus materilli.

over the top

carrier;

of

pull the

the equipment and

straps

at

the sa

IIddit.i

me

onal

tight

and fasten with the

(6)

",long
the

Lift

the top

carrier,

the loaded

of

(7) Fasten the bottom

of

the saddle by means of straps,

The

vided

The

total load carried in the two carriers FM-32 should be

that

an

equal weight is carried on each side of the pack animal.

frame FM-33 is loaded in a similar manDer to the above.

loading, the frame
a.nd

mounting feet

frame

the four bolts provided are

of

of

the saddl

sUap

carr

buckll!6.

ier,

Ilnd

hang

on

one

of

the two metal bars

the' Phillips pack saddle by means

of

the

i

~

placed

on

the fram e and through the

e.

The washers and nute

carrier

as

shown in figure

the top

P93-ed

to the bottom

of

the Phillipll pack saddle,

through the holes in the

hol

es in the top

are

then placed

of

the hooks on

of

43.

bolts and the nute tightened. The cotter pins provided
paned

thr

ough the holes in the bolts and bent over to prevent

the frame

80

di.

After

of

the

on

the

are

then

loosening

of

the nuts.

SJOrION

BAG BG-82

I'urpDto

~rlpU

EmV1oy""'nL ____________________

31.

the radio set

the
sists

The

______

on

Purpose.

_______ h _ _ _

__

_ _ _____ _ _ _

-

SCR-I94

_____

__________ ______

The

bag

8G---82

by a mounted operator.

weight is carried by the

of

two leather pockets connected togetber by a lesther

yoke fits over the cantle of the McClellan saddle, and one

VIII

P

___

h_h

_______________________________________ 83

__

__

___

___________

h _ ____

__

_ _

_______

__

________________

........

hh_

provides a means for operation

It

is

so

hOr!le

arranged

rather than the operator.

It

that
con·

yoka

68

,

pb

81
82

of

of

Or,~

UNIVERSITY

.•.

Of

1<

..

C/o.lJfORN

lA

,

UNIVE~\ITY

OF

CAlifORN

IA

TlIf

11-238

31-03

the

included

BA--32
receiver

leather c

AN
in
and

fl

bags fits on each

adapter

32.

one

ap

Description

(fig. 410),

and

ap

-29-B.
end and a

is held in

in

the side

transmitter BC-222 (

is providM in the

An

Si

FT-236

.-The

and the pocket on the oft side carries

adapter

900ltBt

pla

ce

by

of

the radio pocket is

de.

FT

in

The

(battery) is

pocket

top

-236 for battery connection, with a

the

SII

ap fa steners. An opening with a cover

weight of

11

on

the

fig. 47@).

of

the radio pocket for

other, p •

the

pounds.

near side carries the battery

A hole with

..

s between the

provided to make

bag

00

-82 with its

two

set controls accessible. A leather fitting is provided on

the

radio

pocket

is

pr

ovided for storage

H

S-22-

pocket for carryi

on

the

B.

side of the radio pocket opposite the control opening

noth

the radio pocket and the

of

ng

the

the

mi

antenna when

crophone T-24-E and the headset

battery

no

t

pocket

in

use. A small

the

a.

removable

the

radio

antenna

plug

pockets,

the

the

are

radio

top

padded

of

inside with felt, and
itate
of

prevent

installed in

back of

to
the

trees
Usually, however,
Th

depend upon

antenna used.

set is ope rated as a fixed station with

removal

the

33.

the

e range

two pockets, with straps, which are fastened to

them from bouncing.

Employment.

th

proper length for the coil used (see par.

terrain

or

of

bag

e operator.

to

be

low wires with which the antenna may

of

the

the

In

the

the battery. O.rings

BG--82

traveled is open, and often! no obstruction such

it

radio

terrai n and

most c

battery pocket is fitted with a

-

The

is the same as when worn

The

will be necessary

operation

antenna

AN

set SCR-I94 when us

the

n"", it

frequency, as well as the amount

will

strap

are

of

-29-B

to

be

somewhat less than when

utended

provided on

the

radio

may

6),

with good results

use

th

e antenn a collapsed.

ed

in this manner will

antenna.

set

SOR-IM

as

a pack

be

u!led

co

me

the

the

in

to facil-

bottoms

cinch

on

extended

contact . .

to

when

the

if

118

of

the

(

J...

o.

082

.11 (3--3·.·U).]

By

01IDf:H or

oPnC1AL:

J . A. ULIO,

Major General,

Dun'IWIUTION:

R and H 6, 7

(For

upl.&nation

THE

Th

SECRE."I'.utY

~

Adjutant

(3);

IBn

of

symbols

or

GeMTa/,.

6, 1

(6);

WA~

~

"

:

IC
FM

...

G.

C.

11

(6).

21-6.)

....

...

MARSHALL,

OAUI

,," ."."

.....

"

......

of

Staff.

Or

•.•.

UNIVERSITY

Of

1<

..

C/o.lJfORN

lA