Zenith h723z1 schematic

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AM-FM

TO HEtP

ENJOY

e-r'L

RADIO RECEIVER

tYloDEL

AND OTHER

YOUR

-LL/r-

H723Zr

TIODEUi USING

YOU

NEW

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GENERAL

This new

at its

best. It is designed to

FM

band, as well

A number of important new

performance

The receiver

the

new

for better

POWER SUPPTY

This rccciver may be
Currcnt
does not operate within one minute when
the

po*'er plug should be

also

be followed if a hum is apparent

Alternating

Zenith

Table Model Radio

provide Frequency Modulation

as standard

have

been perfected

broadcast reception.

circuit utilizes an

Selenium

Rectifier,

both of which help to

rrcrformancc.

operated

(AC.) or from ll7 volt

ro'ersed

Currcnt.

features which add

by Zenith engineers for this receiver.

entirely

50

on

Direct

in the wall

to

Current

when the receiver is operated

offers complete radio reception

(FM)

on the

tone

to the

new

type of filter

provide

(r0

cycle 117 r'olt

(DC).

NOTE: If receiver

connected to Direct

socket. T'his procedure

quaiity

system

increased

Alternating

and

and

output

Current,

should

on

FREQUENCY

Radio

broadcast transmissions

(Standard

Broadcast) and Frequency

ITODUTATION

are

two types,

of

Amplitude

Modulation (FM).

Modulation

Frequency

rluction

not

too

absen

t.

Modulation

interference

of

distant from the

provides

static.

or

transmitting

In

a tremendous

most

installations,

station,

static of all

improvement

particularly

types

in

the re-

is

entirely

those

F'requency

creased tonal

which

pre'iously

range

that

roportions.

p

Modulation

range,

allows

ANTENNA
For

STANDARD
in \7a'emagnet
aYerage
the

conditions.

AC

plug and

allows

resulting

have

been unheard,

thc loudest

BROADCAST

which

eliminates

If

hum is apparent

move the

AC

the

in

hearing

and

softest

-

Your receiver

the need

cord away

transmission

musical

but

also

a greatly

fassages

for an external

when

operating

from

the NTavemagnet.

of not

only a greatly

instruments

increased

to

be

heard in

is

equipped

antenna

the

receiver,

and

their

with

in-

sounds

dynamic

true

a

built-

under

reverse

Figure

cRouND

r

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sh

I - Anlenno

TERM|NAT

F.M.

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L

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ANTENNA

Conneclionr

on bock

ANTENNA

TERMTNAI

Wovenognel

of

For

FREQUENCY

is

dcsigned
r.'"'here
antenna
stretched
the plug
FM reception.

In
close to areas with
transmitting
This Antenna
the lead-in
the

line antenna
one side of thc lead-in
rnrrked

for

fairly

system

out

both ways

locations where eiectrical

stations aZenith FM

from the FM Antenna

G."

MODULATION

IircqLrency

strong signals are received

will

in

back

in

hear.y automobile

Kit may

(blue

-

Modulation

providc

of

to the

excellent reception.

receiver.

the

the power socket for

be

purchased

wire)

from the

"F"

Do

interference

tralhc, or in locations

Antenna Kit

from

Kit

terminal

The special built-in

reception

from

not

your

S14188 to the receiver,

"F"

and the other

and in average locations

the transmitting

Be sure the AC

coil or bunch

the position

is experienced,

S14188

Zenith

terminal (see

Line

it up.

which

distant

should be employed.

Dealer. To

Fig. l).

side to the terminal

Antenna

station, this

cord is

Also

try

gives best

particularly

from the

connect

first

remove

Connect

DIAL

S]'ANDARD

portior.r of

at 65
ir.r

1)osl

FREQUIINCY
I:reclucncy
this
Band

CALIBRATION

the

For

exarnplc, a station

on

i'our

-

l-'i5

irt

t tou

'

Modulation band cxtends

rangc thc Zcnith

Switch

tsROADCASI

dial, and

dial scale. A station listed at f.i50

ancl so on.

MODULATION

is

to l;M

set

BAND:'I'hc

is

calibratecl in kilocycles, minus

listed

as operating

tiris

Usc

clial

position.

scrlc

BAND: Thc

has onc I"M scalc. This

It is

bottom dial

when

from 88 to 108 mcgacycles.

calibratcd from

is thc

scalc

the l4st zero.

on 650 kilocycles will

kilocycles will

the Band Switch is

station channcl

scalc is

used when

88 MC

to 108

broadcast

be found
be tuned

to AM

set

of thc

To

covcr

MC.

thc

TUNING

STANDARD BROADCAST
Tr,rning antl
tr,rrn thc

Allo*'about

[Jlnri

thc

To tr-rne the
sirccl station
the clcsircd
knob as far

Volume Control

Volume Control

scconds

l0

thc AM position.

Srlitch

to

rcceiver,

and rcacljust

volumc. To turn

will

as it

go

for

turn the Tuning Control

the

to the left, until

To

I:igure
place

BAND:

knobs.

knob to the right.

thc tubes

Volume

thc receiver

to reach operating

Control

OFF,

"click"

a

2 sho*'s

instrument

the

This

the position

will turn

in

on the set.

temperature.

knob slowly to

knob to the right or

rotate the

Volume

is heard.

of

operation,

Set

the de-

left to

Control

F'REQUENCY

in the same

OFF

MODULATION BAND: The receiver is turned

manner as in standard

S*'itch nrrst bc sct to

Figure

l"M

-

Fronf Ponel

2

rrosition.

View

and

ON

broadcast

operation. The Band

TUNING THE RECEIVER ON

THE FREQUENCY MODULATION BAND !yILL REQUIRE MORE

CARE
noted when
and

THAN

tuning between

will

disappear as the station

pointer should be

reception and best tone
the disappearance of background noise.
stations are heard over great
tune in

other

transmission

THE BROADCAST BAND. A hissinq sound may be

ON

Frequency

moved back and forth

quality

than

limits

Iocal

your

reception

is

tuned

is found.

distances

stations.

to areas

Modulation stations. This

in.

After a station

it until the

over

Correct

tuning is indicated by

Although Frequency

rare occasions, do not expect to

on

is

is located, the

of

point

quietest

Modulation

normal,

The nature of Frequency Modulation
within the

approximate horizon.

Wa/rrntdf

ZenithRadioCorptrrationwarrantscachnew.Zen'ith

recciver,

radio
thereof,

de'fects

from
normal

to

ited

or'combinatiirn,

ducer

(90)

ninety

tlac iluthorizcd

to

and

made

in accordrtnce

tive

Corporatron.

Radio

The obligation

rnaking

io

does

and
ofanvlabtrrinconnecti<lnwiththeinsttrllationofsuch
rcplafement

transportation

any

2enith'

not be

sh:rll
or deliry

warranty

above
orindirectly,i..,.unypreference,priorityor-alIcrcation

issued

order

of

act
inadeouate

o? God,

acts
Zeniths'
posest

or

its fault,

irut

warranty

This

warranties,

and
Corporation
sentative

in connection

bility
reivers,
thereof,

The

parts

thereof

inyone

contractor

alteration,

any receiver

of

altered,

phonographic

ncw Zcnith

c'ach

and

usagc.

replacing

thc G6vernment

warranty herein

other

s'ttrkmanship

in

Its obligation

any

from datc

days

which shall

not include

Raclio

in

reasonable

any cause

or
phonographic

or Zenith

defaced

dcaler

with tlre

ttf

replacement

parts nor

expense. \,

Corporation

in

liable

performing

if suih
the Government,

by

transportation

strikes,

requirements
beyond

whether the

Condifionr

is expressly

expressed

neither

other

Person

Quality

which

than an
distributor

or

negligence

misuse,

which has had

removed.

or

part

Zenith

repr"ducer'

Quality

and

under

')r partr

or rcplacing

purchase, -shall

of

whtttn the

frrtm

to

found

be

policies cstablished

Radio

parts

available

making

the

eithcr

does it

an1' respect

its

lockouts,

assumes

with the

have been

include

assumes

obligations

or

failure

war, conditions

or by

facilities,

Sovernmental
control

.its

kind

same

Erclurions

ond

in lieu
or implied,

nor authorizes

assume

to

sale of Zenith

reproducers,

Tubes.

not apply

shall

authorized

ZENITH RADIO

or

repaired

which

or

the serial

()r

combrnatlon

he

t".

Tuhc

materiirl

this

ilf

have

Corporation

for failure

delay

or

conditions

for manufacturing

of all other

Zenith

accident, or

arising

u'arranty

reccivcr'

thc

p'hich,

tubes

because

or not.

for it any

have been

be.rcturncd

purchase

been thus

by
is

purchaser,

the

to

furnishing

or the

responsibility

no liability

to

with respect.

results,

of any

weather,

of

controls,

or occurring

agreements

Zenith

and

any

other

Radio

or combinations

receiver

to any

or replaced

dealer,

subiect

to the

number

CONPORATION

is

repro-

within

Zenith

limited

periorm

directly

of

service

or

free

from

lim-

was

defec-

ft'i

and

.

the

to

other

war,

tlr

pur-

with-

Radio
repre-

lia-

re-

or
by

to
parts
name

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