Operating instructions

ManualsBrandsCadence ManualsCar AmplifierZRS C8

..,i'itch

S1

is

turned

from position

1

to

position

1.

This

changes

the

sensitivity

of

the

tubes,

.releasing

it

for

each

higher

frequency

band.

r.

Because

of

rich

harmonic

frequencies

of

:he

bfo

and

the

calÍbration

oscillator,

there

is

ir ntixirrg

of

the

third

harmonic

of

the

calibra_

tion

oscillator

and

the

fourth

harmonic

of

the

ìrto,

causing

an

audio

tone

of 6.66

kc

in

the

back_

grc.uncl

u'hich

is

undesirable

but

unavoiclable.

68. Monitoring

Operotion

(flg.

84)

n.

For purposes

of

monitoring

sidetone

in

s1-stem

appiications,

connection

is

made

from

an

external

transmitter

to

MONITORING

IN_

PUT

receptacle

J1.

In

this

mocle

of

operation,

a 12-r,olt

cl-c

or

a 24-volt

d-c

input

may

be

used

to

energize

relay

K1.

This

opens

the

plate

and

screen

t-ciltage

I'r

,t.

it-i

irtììir.

j;ì1.y.

..

.

-

abling

the

tLrlte.

irntl si.ri,r't:

t!:r..

r.r

..

ground.

The

iori-

irntl

high

iL_t'

rrn:ì

...

.

still

operative.

(1)

For

12-

and

2-l-r-rilt

r-clrierr.r,:.

tion,

the

disabling

r-oltugc

i.

,

,

..

directly

from

the

llo\\,er

>ut)t,.,.,.

i

_

volt

operation,

R23

ilrrips

rirt:

.,i,

supply

to 12

volts

to

actir.:Ltc

Lt..r,.

I

The

coil

of

disabling

lela1.

Iil

i:

r r

pleted

to

ground

at

the

ti,;Ln.rnl...

through pin

C of

J1,

ancì r.ìoì.nlrrÌì...

..

.

be

connected

in

such

à tranìì€t.

rr:

cause

operation

of

the relal.l.irrn

:r

.

push-to-talk

circuit

of

the

tlansnti.t

.,

,

is

closecl.

(2)

For

6-volt

vehicular,

clry_battelr..

,

r.

115-volt

a-c

operation,

extelnul

rli._

SI SECÎ

2

FRONT

R35

3,3

MEG

trt 7

t:l

I

E_

!

+90v

J4

(P/N

6)

----

|

\1sz

f-r

I

cA

L:l

SECI 3

REAR

VI

SCREEN

'

b-Erl

N OTES

:

I.

UNLESS

OTHERWISE

INOICATEO:

ALL

RESISTANCE

VALUES

ARE

ALL

CAPACITANCE

VALUES

ARE

K

s

I,OOO

OHMS

MEG

=

I,O0O,0OO

oHMs

SWITCH

SECTIONS

DESIGNATED

NEAREST

KNOB

END.

swtTcH

_SECTtONS,

AS VtEWED,

ROTATE

couNTERcLocKwtsÉ.

SI

SECI.

I REAR

IN

OHMS.

IN

MICROMICROFARADS.

V4

SCREEN

I

@

@

R33

to0K

tBANp

surl

I

I

I

I

I

?,

4.

32

SECT.2

REAR

S2

SHOWN

POSITION

Figu,re

33,

Rurlio

Receiuer

R^lflrlLlRR,

ctLlíbrutíott,

s,

t.tir,ir

I

,,t

Ii.l.\-lt..ll,s,/.;iúli

f

uncti

o

nal

s ch

e t na

t í

c,

8Al,/o/

r/

PR/41ARY

8AI/O

4 T5

PRII,IARY

8A/'/O

J T5

PR/MARY

SANO

2

T/

PR//I,IARY

TM

295-34

Q'

53