Panasonic Rf -4800 User manual

•

n

Ions

MODEL NO. RF

-4800

FM/AM

10-BAND

COMMUNICATIONS

RECEIVER

Panasonic®

Read

these

instructions

completely

before

operating

this

set.

Your new Panasonic radio

receiver

RF-4800 was manufactured and assembled

under

exacting quality control standards.

The incorporation of the latest advances in radio design and the use

of

the most

modern components ensure outstanding performance with superb sensitivity and

tone quality.

Just a few minutes

of

your

time

spent reading carefully through these instructions

will

assure

your

obtaining optimum performance that

will

bring you continued

enjoyment

for

many years.

CONTENTS

LOCATION OF

CONTROLS...............................................................

3

POWER SUPPLY

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

3

ANTENNAS

.......................................................................•...........•

4

CONTROLS AND FUNCTIONS

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

5

RECEIVER OPERATION

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

7

ABOUT SSB AND

CW

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

8

ELECTROMAGNETIC-WAVE PROPAGATION

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

9

PRECAUTIONS

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

9

HELPFUL HINTS

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

9

SPECIFICATIONS

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

.,

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

10

The

serial

number

of

this

product may be found on the

back

of the unit.

You should note the

serial

number

of

this unit in the space provided and retain this

book as a permanent record

of

your

purchase to aid in identification in the event of

theft.

MODEL

NUMBER

:_

.....

R

....

F_--"48...,O.."O'--_

SERIAL

NUMBER:

______

_

WARNING:

TO PREVENT FIRE OR SHOCK HAZARD,

DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.

-1-

-2-

LOCATION OF CONTROLS

o Power Switch

8 FM AFC/Band Width Switch

8 AM ANL (Automatic Noise Limiter) Switch

e AM Mode Switch

o Tuning/Battery Indicator

CD

SW1/MW/FMTuning Scale

8 SW1/MW/FMTuning Control

fa)

SW2-8 Tuning Control

o Digital Frequency Display

Gl>

SW2-8 Calibrater

~

SW2-8 Tuning Scale

~

SW2-8 Band Selector

G) Main Band Selector

~

Earphone/External Speaker Jack

~

Recording Output Jack

~

Auxiliary Input Jack

~

Volume Control

(9

Bass Control

~

Treble Control

~

BFO Pitch Control

~

Light Switch

@)

Display Switch

@)

Indicator Switch

~

AM

RF

Gain Control

~

Antenna Trimmer

~

MW Ferrite-Core Antenna

~

FM Antenna Terminals

@)

MW/SW1 Antenna Terminals

@)

SW2-8 Antenna Terminals

~

Coaxial-Cable Antenna Jack

~

DC Input Jack

~

AC

Input Jack

POWER SUPPLY

Battery Operation:

• Open

the

battery

compartment

covers

by

pushing

each latch

as

shown

in Fig.

1.

•

lrisert

8

"0"

size

(Panasonic

UM-1

or

equivalent)

batteries,

observing

the

correct

polarity,

as

shown

in Fig.

2.

Place

the

cloth

bands

under

the

batteries

to

facilitate

easy

removal.

•

Replace

the

compartment

covers.

Note:

Make

sure

the

DC

Input~

and AC

Input~

jacks

are

dis-

connected.

-3-

To check the battery condition:

Set

the

Indicator

Switch@) to

"BATT"

position

with

the

power

on.

The

Tuning/Battery

Indicator0

then

shows

the

battery

condition.

NORMAL

.

FULL

BATT Fig. 3

When

the

indicator

reads

in

the

"0"

range

as

shown

above

the

batteries

are

good.

\ I

\ /

WEAK

\~

3 I

~d8

\ I I

\

BATJJ:RY

FULL

Fig. 4

When

the

indicator

reads

in

the

"x"

range

as

shown

above

replace

all

the

batteries

with

new

ones.

AC Power Operation:

•

Connect

the

included

AC

power

cord

to

the

AC

Input

Jack~

and

to

your

household

AC

electrical

outlet.

On

plugging

the

power

cord

into

the

AC

Input

Jack~,

opera-

tion

changes

from

battery

or

external

DC

power

to AC.

III

111111111111

III

111111111111

III

111111111111

III

()

I!l

to

AC IN Fig. 5

Car/Boat Battery Operation:

•

Insert

the

plug of a

car

battery

adaptor

cord

into

the

DC

Input

JackG.

• Plug

the

other

end

into

the

cigarette

lighter

socket

in

your

car

or

boat.

•

This

automatically

disconnects

the

internal

batteries

and

the

receiver

operates

on

external

DC

power

only.

Note: For the

connection

of an

adaptor

cord,

follow

the

instruc-

tions

provided

with

it.

ANTENNAS

FM:

Connect

the

accessory

compact

FM

antenna

to

the

FM

Antenna

Terminals~,

then

extend

and

fix

the

antenna

on

the

wall

near

a

window

by

using

three

push-pins

or

adhesive

tape

as in Fig. 6.

If

the

FM

station

is

still

weak,

connect

a

suitable

outdoor

FM

antenna

(impedance:

75 ohms) to

replace

the

compact

antenna.

(For

installation,

follow

the

instructions

provided

with

the

antenna.)

MW:

The

rear

ferrite

core

antenna

will

assure

excellent

MW

recep-

tion

in

most

areas.

If

the

stations

are

distant

or

if

the

signals

are

very

weak,

connect

a

suitable

length of

the

accessory

antenna

wire

to

the

MW/SW1

Antenna

Terminals~,

and extend. (See

Fig. 7.)

=

~

11111111

111111

11111

II

IIIIIIIIIWIIIII

! I

:=J

~

To fix, use p

ush-pins

ape

or

adhesive

t

111111111111

III

Fig. 6

111111111111

III

111111111111

III

~

g

n

~~

~ ~

"

I!le!l

How

to

Connect

Antenna

Wires

to

the

Terminals

Push

~

Terminal~~

Q

W/

~¥

i

Insert

wire

Push

Fig.

8

Te,minal_r

C)

r

C)

~

Iir.

Push

~ert

wire

-4-

SW:

External

antenna

and

ground

connections

are

required.

Figs.10-

13

give

examples

of

outdoor

SW

antenna

installation.

For

SW1

reception,

connect

the

antenna

and

ground

wires

to

the

MW/SW1

Antenna

Terminals~;

for

SW2-8

reception,

connect

them

to

the

SW2-8

Antenna

Terminals~.

The

Coaxial

Cable

Antenna

Jack€!)

for

SW2-8

reception

may

be used to

connect

an

SW

antenna

with

a

coaxial

cable.

With

this

kind

of

antenna,

solder

the

accessory

metal

plug

to

the

end of

the

cable

as in Fig.

9.

Erecting

the

antenna

as

high

and as

far

away

from

noise-generating

equip-

ment

and

high

tension

cables

as

possible

improves

the

recep-

tion.

To

avoid

danger

from

lightning,

it

is

strongly

advisable

to at-

tach a

safety

device

between

the

outdoor

antenna

and

the

receiver.

Fix a

knife

switch

(completed

connections

as

indicat-

ed in Fig. 14) as

near

to

the

receiver

entrance

of

the

antenna

lead

as

possible.

During

electrical

stroms,

short-circuit

the

antenna

to

ground

by

reversing

the

switch

to

the

ground

side.

jcore

.-Braided

Wire

Coaxial

Cable

-----Antenna

Wire

Antenna

Terminals

Plug

Cap

Fig. 7

Solder

core

Solder

braided

wire

Fig. 9

I~

10-15m

Horizontal

Antenna

Fig.

10

.\---

10-15m--~·-II-,o----10-15m---l

Doublet

Antenna

Fig.

13

RECEIVER

Slant

Antenna

Fig.

12

Knife

Switch

To

antenna

terminal

-'

To

antenna

To

ground

terminal

~D

?-

Resis

tor

UW,

10kH)

To

ground

During

electrical

storms,

make

sure

to

reverse

the

switch

to

the

ground

side

to

connect

the

antenna

directly

to

the

ground.

Fig.

14

CONTROLS AND FUNCTIONS

o Power Switch

Turn

the

power

on

and

off.

8 FM AFC/Band Width Switch

Has a

combined

function

as an AFC

(Automatic

Frequency

Control)

switch

on FM, and a

band-width

switch

on AM (MW

and SW).

Normally

leave

it

in

the

ON/WIDE (up)

position

.

• On FM,

if

you find

it

difficult

to

tune

in a

particular

station

because

of a

strong

adjacent

station,

then

switch

it

to

OFF/

NARROW (down).

• On

MW

and

SW,

if

your

received

station

is

interfered

by

another

adjacem

station,

then

move

the

switch

to

OFF/

NARROW (down).

• AM ANL (Automatic Noise Limiter) Switch

Set

this

switch

to

ON to

cut

out

impulsive

noise

such

as

lightning,

or

other

sparks.

Normally

it

should

be

positioned

at

OFF.

e AM Mode Switch

For

CW

(Continuous

Waves)

or

SSB

(Single

Sideband)

recep-

tion,

turn

to

the

CW/SS!:I

position.

When

listening

to

any

other

broadcast,

the

switch

should

be

set

in AM. This

switch

has no

effect

on FM.

-5-

«3

Tuning/Battery Indicator

Acts as

tuning

and

battery-checking

meters.

Setting

the

Indicator

Switch~

to

SIGNAL

makes

the

indicator

show

the

relative

strength

of

signals

tuned

in (the

stronger

the

signal,

the

greater

the

deflection

to

the

right) and

assist

in

obtaining

the

best

reception.

Setting the

switch

to

BATT

makes

the

indicator

show

the

battery

condition.

o

SWlIMW/FM

Tuning Scale

SW1

:

1.6-3

MHz

MW: 525-1605 kHz

FM:

88-108

MHz

8 SW1/MW/FM Tuning Control

Use

for

the

SW1, MW, and FM

reception

.

o SW2-8 Tuning Control

Use

for

the

SW2-8

reception.

This

control

features

two-speed

tuning.

To

obtain

precise·

tuning

(particularly

on SW), pull

out

the

control

to

reduce

the

tuning

speed. To

restore

the

normal

speed, push

the

control

in.

o Digital Frequency Display

Indicates

the tuned

frequency

for the SW2-S bands only,

show-

ing

the

main

digit(s)

and

three

decimal

points

in MHz.

Note: No

display

appears

when the

Main

Band SelectorG) is

set

in

any

position

other

than

"SW2-S"

and/or

when

the

Dis-

play

Switch@) is

turned

off.

dl>

SW2-8 Calibrater

Use

only

for

SW2-S

reception.

If

the

digital

frequency

display

does

not

agree

with

the

fre-

quency

of a

known

station,

correct

the

error

by

turning

the

calibrater

with

your

finger

tip

until

the best

reception

is

ob-

tained. (See

page

7.)

G)

SW2-8 Tuning Scale

SW2:

3-7

MHz

SW3: 7-11 MHz

SW4: 11-15 MHz

SW5: 15-19 MHz

SW6: 19-23 MHz

SW7: 23-27 MHz

SWS: 27-31

MHz

~

SW2-8 Band Selector

Choose

the

desired

band, SW2-SWS.

This

selector

has no

effect

unless

the

Main

Band

SelectorG)

is

set

at

"SW2-S".

(i) Main Band Selector

Set to the

desired

band.

~

Earphone/External Speaker Jack

Connects

the

included

earphone

or

optional

extra

external

speaker

(impedance:

4-S ohms). When the plug

is

inserted,

the

built-in

speaker

is

automatically

disconnected.

Note:

For

connecting

a

headphone,

use

the

supplied

head-

phone

adapter.

G)

Recording Output Jack

Connects

a

tape

deck

for

recording

from

the

receiver.

Plug

the

cable

to the

tape

deck

into

this

jack.

Radio

programs

can

be

recorded

while

listening

at

the

desired

volume

level

as

the

sound

level

at

this

jack

is

fixed.

The

recording

level

should

be.

adjusted

by

using

the

control(s)

on

the

tape

deck.

~

Auxiliary Input Jack

Connecting

another

audio

source

(such as a

tape

deck,

record

player,

etc.) to

this

jack

makes

the

receiver

work

as an

audio

amplifier.

Plug the

cable

from

the

output

of

your

audio

source

into

this

jack. The

sound

from

the

receiver

shuts off

auto-

matically.

Note:

For

record

player

operation,

this

jack

allows

only

the

type

with

a

ceramic

or

crystal

cartridge

to be

operated.

iI

Volume Control

C9

Bass Control

Regulates

the

low

tone.

~

Treble Control

Regulates

the

high tone.

WBFO Pitch Control

Used to

obtain

clear

SSB and

CW

sounds.

Properly

tune

to SSB

or

CW

signals,

then.carefully

rotate

this

control

until

the

signals

are

most

suitable.

(See

page

S.)

~

Light Switch

When

tuning

in

the

dark,

push to ON. The

Tuning/Battery

Indicator0

and a

tuning

scale

being

used

will

be

illuminated.

Turn off

when

the

illumination.is

unnecessary.

-6-

~

Display Switch

This

turns

the

Digital

Frequency

Display€)

on and off.

For

saving

the

battery

power,

this

switch

should

be

turned

off

except

for

tuning.

@jlndicator Switch

Setting

this

switch

to

"SIGNAL"

makes

the

Tuning/Battery

Indicator0

show

the

tuning

condition

or

relative

strength

of

received

signals.

Switching

to

"BATT"

indicates

the

battery

condition

on the

indicator0.

~

AM

RF

Gain Control

Adjusts

the

receiver

sensitivity

for

MW,

or

SW

(including

SSB and CW)

reception.

Normally

keep

it

in the

full-clockwise

(OX)

position.

If the station is

sufficiently

strong

to

casue

overloading

or

distortion

in the

receiver,

slowly

rotate

this

control

counterclockwise

until

clear

sound is

obtained.

This

control

has no

effect

on FM.

~

Antenna Trimmer

Eliminates

the

difference

between

the

external

antenna

and

the

rE;!ceiver

impedances

so

that

incoming

signals

can

without

loss

come

through

the

antenna

to

the

receiver.

Carefully

rotate

it

for

best

reception.

This

trimmer

is used

for

SW2-S

reception

only.

~

MW Ferrite-Core Antenna

Effective on MW only.

For

best

reception,

push the

antenna

holder

down

to

the

horizontal

position

(Fig. 15),

and

then

position

it

in

the

direc-

tion

which

provides

the

best

results

(Fig. 16).

Note: Do not

swing

this

antenna

unless

its

holder

is

horizon-

tal,

nor

swing

further

over

a

quarter

rotation.

iI

FM Antenna Terminals

Connecting

an

external

FM

antenna

to

these

terminals

as-

sures

excellent

FM

reception.

e MW/SW1 Antenna Terminals

An

external

antenna

connected

to

these

terminals

will

improve

the

quality

of

the

MW and

SW1

reception.

For

SW1

reception,

be

sure

to

connect

an

appropriate

external

antenna

(and

ground

system)

to

these

terminals.

On MW

recep-

tion,

the

equipped

ferrite

core

antenna

will

be

enough.

If

the

MW

signals

are

very

weak

and the.

ferrite

core

antenna

does

not

provide

good

enough

reception,

connect

an

external

MW

antenna

(and a

ground

system)

to

these

terminals.

~

SW2-8 Antenna

Terminals

For

SW2-S

reception,

connect

an

external

SW

antenna

(and a

ground

system)

to

these

terminals.

Unless

this

connection

is

performed,

there

will

be

no

reception.

G)

Coaxial-Cable Antenna

Jack

Provided

only

for

SW2-S

reception.

Connect

the

coaxial

cable

from

an

external

SW

antenna

to

the

accessory

plug, then

insert

the

plug

into

this

jack.

~

DC

Input

Jack

Connects to

any

external

12-volt,

DC

source.

When

the

connection

is made, the

internal

batteries

a,re

auto-

matically

disconnected.

Note:

For

the

use of

any

external

DC

source,

be

sure

to

un-

plug

the

AC

power

cord

from

the

receiver.

(See

page

4.)

~

AC

Input

Jack

To

operate

on AC,

connect

the

accessory

AC

power

cord

between

this

jack

and

your

household

AC

electrical

outlet.

When

the

plug

is

inserted

in

this

jack, both

the

internal

bat-

teries

and

external

DC

source

are

automatically

disconnected.

RECEIVER OPERATION

Your

new

Panasonic

radio

receiver

RF-4S00

should

be

ope-

rated as

any

standard

radio.

However,

to

obtain

the

best

perfor-

mance

and

take

advantage

of

some

of

the

high

performance

features

of

the

set,

we

suggest

you read

the

following

operating

hints.

MW/SW1

Reception:

Control

Position

Main

Band

SelectorQl

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

MW,

or

SW1

AM

Mode

Switche

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

AM

Band

Width

Switchfj

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

WIDE (up)

AM

RF Gain

Control~

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

DX

Indicator

SWitch@)

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

SIGNAL

Tuning

Controlf)

'"

.......

"

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

Desired

Station

Volume

Control

CD

.................,......

Desired

Level

To

reduce

interferences:

• Set

the

Band

Width

Switchfj

to

NARROW (down), and retune.

•

Turn

the

AM RF Gain

Control~

counterclockwise

until

the

interfering

station

disappears.

•

Reposition

the

back-equipped

ferrite-core

antenna

so

that

the

interference

is

minimal.

FM Reception

Control

Position

Main

Band

SelectorQl

'"

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

FM

Indicator

Switch@)

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

SIGNAL

FM AFC

Switchfj

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

ON

(up)

Tuning

Controlf)

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

Desired

Station

Volume

Control

CD

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

Desired

Level

Note:

If

the

desired

station

is

closely

adjacent

to a

stronger

station,

the

AFC

mall

tune

the

receiver

to the

strong

station. At

such

times,

tune

in the

desired

station

with

the

FM

AFC

Switchfj

in

the

OFF (down)

position.

-7-

SW2-8

Reception:

Control

Position

Main

Band

SelectorQl

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

SW2-S

Band

Selectorf!)

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

Desired

Position

SW2-S Calibrater(@

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

Center

AM

Mode

Switche

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

AM

RF

Gain

Control~

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

DX

Band Width

Switchfj

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

WIDE (up)

Display

Switch~

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

ON

(only

during

tuning)

SW2-S

Tuning

Control(l)

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

Desired

Station

Antenna

Trimmer~

..,

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

Proper

Position

Volume

Control

CD

..

,.....................

Desired

Level

To

correct

any

frequency-display

error:

1.

Tune to

any

already-known

frequency

on SW2-S, and

make

sure

the

correct

frequency

is

displayed.

2.

Watch

the

Tuning

Indicator0

while

slowly

turning

the

SW2-S

Calibrater(@

with

the

Indicator

Switch@) at SIGNAL.

When

the

meter

pointer

deflects

to

the

extreme

right, the

best-tuned

frequency

strictly

accords

with

the

display.

Note:

*

At

the

"WWV"

positions

on

the

SW2-S

Tuning

Scalea.,

the

5.000, 10.000, and 15.000

MHz

standard-frequency

signals

would

be

received,

and

those

signals

may

helpfully

be

used

for

the

error

correction.

*If

the

Tuning

Indicator0

is

difficult

to read

because

of too

strong

signals,

turn

the

AM

RF

Gain

Control~

counter-

clockwise

to

decrease

the

receiver

sensitivity.

*

Changing

to

another

band

may

require

readjusting

of the

SW2-S Calibrater(@.

To

reduce

interference.s:

• Set the

Band

Width

Switchfj

to NARROW (down), and retune.

• Rotate the AM

RF

Gain

Control~

counterclockwise

until

the

interfering

station

disappears.

To

decrease

background

noise:

•

Adjust

the

Antenna

Trimmer~.

• Turn

the

Treble

ControlGi)

counterclockwise.

•

Make

sure

the

antenna

and

ground

are

properly

connected.

•

Try

the

AM

ANL

Switch8.

NOTE:

*

SW

(including

SSB and CW) reception

is

greatly

affected by a

connected antenna. Therefore,

to

obtain

the

best

possible

reception,

proper

antennas

are

required.

*Some 3D-minute

passage

after

power

application

will

provide

essentially

stable

receiver-operation.

*

Turning

the

Display

Switch~

on and off

may

slightly

drift

the

displayed

frequency.

SSB and

CW

Reception:

Set up

the

receiver

in

the

same

manner

as

SW2-8

reception, and

then

follow

the

procedure

below.

• Set

the

AM

Mode

SwitchE» to CW/SSB.

• Tune to

the

desired

signal.

• Rotate

the

BFO Pitch

Control~

until

the

received

signal

becomes

clear.

Note: *If

received

signals

are

too

strong

to

clearly

be heard,

rotate

the

AM

RF

Gain

Control~

counterclockwise

until

distinct,

pleasant

sound is obtained.

*In

receiving

two-way

communication

signals,

a

possible

difference

between the

two

frequencies

may

demand

another

BFO Pitch

Control~

adjustment.

ABOUT SSB AND CW

Single-Sideband

(55

B):

In

general,

SSB

corresponds

to a

modulated

wave

in

the

AM

Double-Sideband (DSB)

signal.

It

is

used

for

professional

purposes,

amateur

wireless,

and

it

can be

regarded

as a

special

type

of AM wave.

Features:

1.

In

case

of

transmitting:

All

informations

are

transmitted

with

a

little

energy

and band width.

2.

In

case

of

receiving:

Since

there

is no

carrier,

it

is

neces-

sary

to

use a

special

detection method.

AM (DSB)

waves

can be

illustrated

in

a

spectrum

as in Fig. 17.

Electromagnetic

wave

(carrier)

with

two

sidebands

is

transmitted

as a

single

group

in an AM form. High

frequency

waves

are

contained

in

the

Upper-Sideband

(USB)

while

the

lower

frequency

waves

are

in

the

Lower-Sideband

(LSB). Voice and

other

informa-

tion

are

contained

in

the

side

bands

but

are

not

included

in the

carrier;

thus

the

carrier

is

not

always

necessary, and

other

methods

for

transmitting

the

informations

are

considered.

One of

these

methods is SSB.

Either

the

USB

signal

or

the

LSB

signal

is

transmitted

and

it

depends upon

individual

customs.

Usually

for

amateur

communication,

LSB is used

under

10

MHz.

SSB

waves

are

generated

by passing

the

AM

wave

through

a

band-pass

filter,

then

selecting

either

USB

or

LSB and

sending

the

signal

through

the

transmitting

antenna.

In

receiving

SSB

(USB

or

LSB)

waves

on an

ordinary

AM

receiver,

it

would

not

be

possible

to

hear

a

transmitted

voice

unless

a

special

alteration

was

made

at

the

detection

stage;

either

to

construct

the

carrier

-8-

and

detect

the

AM

after

adding

the

SSB

or

to use

the

switching

method

(product

detection) on

the

frequency

of

the

carrier

for

the

SSB. The

latter

method has less

distortion,

and

it

is used in

this

receiver.

t

Strength

of

the

frequency

component

Carrier

Lower-Sideband

(LSB)

Upper-Sideband

(USB)

-----I~~

Frequency

Fig.

17

Continuous Waves (CW):

In practice,

it

is used

to

transmit

Morse

code

signals

by

inter-

mitting

the

carrier,

but

it

is

difficult

to

hear

the

sound

even

after

AM detection. Using

the

detection

circuit

of the SSB,

the

inter-

mitted

sound

can be

heard

by

product-detecting

the

carrier

and

by

varying

the

frequency

slightly.

ELECTROMAGNETIC-WAVE PROPAGATION

Electromagnetic

waves

of a

SW

broadcast

are

separated

into

sur-

face

waves

which

are

propagated

along

the

surface

of

the

earth

and

space

waves

which

are

propagated

upwards.

Low

frequency

waves

(LW and MW)

are

surface

waves,

while

high

frequency

waves

(SW)

are

bounced

off

the

ionosphere

which

is located

100-300km

above

the

earth

surface.

This

layer

is

charged

and

acts

like

a

mirror

toward

electromagnetic

waves.

That

is

why

high

frequency

waves

can be

received

over

great

distances.

On the

other

hand,

the

electromagnetic

waves

of

higher

fre-

quencies

(VHF)

protrude

through

the

ionosphere

and can

only

be

used

for

short

distances.

The

ionosphere

is

thought

to

have been

made

by

the

ultra-violet

rays

of

the

sun, and

consequently,

the

conditions

of

the

ionos-

phere

change

from

time

to

time

due

to

the

position

of

the

sun.

Seasonal

variations

also

occur.

Since

it

is

multilayered,

the

path

of

propagation

of

electric

waves

is

extremely

complex;

In

parti-

cular,

solar

spots

whose

number

changes

every

11

years

changes

affects

the

shape

of

the

propagation.

In

receiving

SW

broadcast,

PRECAUTIONS

For

your

safety

and

to

prevent

damage

to the

set:

• Do

not

connect

the

set

to

any

AC

outlet

other

than

the

type

supplying

120

volts.

•

Avoid

cuts,

scratches,

or

poor

connections

in

the

AC

power

cord

which

may

result

in

possible

fire

or

electric

shock

hazard.

Also,

excessive

bending,

pulling,

or

slicing

of the

cord

should

be

avoided.

• Do

not

unplug

the AC

power

cord

by

pulling

on

the

cord.

To

do

so

may

cause

permature

failure

or

shock

hazard.

•

Do

not

operate

the

set

on AC

power

in a

bathroom

as a

poten-

tial

shock

hazard

may

result.

-9-

one

must

keep

all

of the

foregoing

in

mind.

The best

known

SW

stations

take

all

of

the

factors

into

consideration

and

change

the

frequency

from

season

to

season

or

broadcast

with

two

or

more

different

frequencies

at

the

same

time,

so

that

the

most

suitable

reception

can be

achieved.

Broad-

casting

station

HELPFUL HINTS

Fig. 18

• If

the

set

is not used

for

a long

time

or

is used

only

from

an

AC

power

source,

remove

all

the

batteries

to

prevent

poten-

tial

damage

due

to

possible

battery

leakage.

• When

the

sound

volume

begins

to

lower,

it

is

advisable

to

replace

all

the

batteries.

with

new

ones

before

they

are

completely

discharged.

• Do

not

subject

the

set

to a

temperature

of

over

60°C (140°F),

because

characteristics

of

the

internal

parts

may

be

adverse-

ly

affected by heat.

Especially,

never

leave

the

set

in a

car

exposed

to

direct

sunlight

for

a

long

time

with

all

the

doors

and

windows

closed.

The

cabinet

may

become'

deformed,

and

deterioration

of the

performance

may

result.

• Do not

use

benzine,

thinner,

or

the

like,

or

any

abrasive

powder

to

clean

the

cabinet.

Wipe

it

with

soft

cloth

moistened

with

a

mild

soap

and

water

solution.

Power

Source:

Power

Consumption:

Receivable-Signal

Types:

Frequency

Range:

Reception

Method:

Intermediate

Frequency:

Frequency

Display:

Antenna:

Sensitivity:

SPECIFICATIONS

AC 120V,

60

Hz

DC

12V;

eight

1.5V

batteries

(Panasonic UM-1

or

equivalent),

or

any

external

12V

DC

source

(such as a

car

or

boat

battery

through

a

car-battery

adaptor)

10W

FM, AM,

CW,

and SSB

FM

BB-10B MHz

MW 525-1605 kHz

(571-1B7m)

SW1

1.6-3.0 MHz

(1B7-100m)

SW2 3.0-7.0 MHz (100-42.9m)

SW3

7.0-11.0 MHz (42.9-27.3m)

SW4 11.0-15.0 MHz (27.3-20.0m)

SW5 15.0-19.0 MHz

(20.0-15.Bm)

SW6 19.0-23.0 MHz (15.8-14.7m)

SW7 23.0-27.0 MHz (14.7-11.1m)

SWB 27.0-31.0 MHz (11.1-9.7m)

FM

Superheterodyne

MW/SW1

Superheterodyne

SW2-B

Double-Superheterodyne

(variable

oscillated-frequency

up-converting,

premixing

system)

FM

10.7 MHz

MW/SW1

455 kHz

SW2-B

1st IF 2 MHz

2nd IF 455 kHz

SW2-B

(3.0-31.0 MHz)

7-segment, red LED

5

digits

Easy

reading

to

three

decimals

in

MHz

(below

1 kHz to

the

closest

round

number)

FM

External

antenna

(75.0)

MW

Built-in

ferrite-core

antenna

and

external

antenna (75n)

SW1

External

antenna

(75n)

SW2-B

External

antenna

(75n),

or

M-type

coaxial-

cable

antenna (75n)

FM

3 dB

down

limiter

1.6/1V

SIN

26

dB

31N

MW

SIN

10

dB

60,uV/m

SIN

26

dB

400,uV/m

SW1

SIN

10

dB

1.0,uV

SIN

26

dB

6.0,uV

-10-

Image Ratio:

Selectivity:

Frequency

Stability:

(SW2-B)

Input

Jacks:

Output

Jacks:

SW2-B

Tuning

Control:

Semiconductors:

Power

Output:

Speaker:

Dimensions:

Weight:

SW2

SIN

10

dB 1.3,uV

SIN

26

dB

B.O,uV

SW3

SIN

10

dB

O.B,uV

SIN

26

dB 5.0,uV

SW4

SIN

10

dB 1.2,uV

SIN

26

dB 7.0,uV

SW5

SIN

10

dB 1.2,uV

SIN

26

dB

7.0,uV

SW6 SIN

10

dB

1.2,uV

SIN

26

dB

7.0,uV

SW7

SIN

10

dB

1.3,uV

SIN

26

dB

B.O,uV

SWB

SIN

10

dB

1.3,uV

SIN

26

dB

B.O,uV

FM

30

dB

(9B

MHz)

MW 40 dB (1000 kHz)

SW1

30

dB (2.3 MHz)

SW2

65 dB

(5

MHz)

SW3

60

dB

(9

MHz)

SW4 55 dB

(13

MHz)

SW5

50

dB

(17

MHz)

SW6 45

dB

(21

MHz)

SW7

35

dB

(25 MHz)

SWB 35

dB

(29 MHz)

(SW2-B

is 1st

IF

image

ratio.)

FM

±200

kHz (35 dB),

±400

kHz

(70

dB)

AM WIDE

±2.5

kHz

(-6

dB),

±15

kHz

(-60

dB)

NARROW ± 1.7 kHz

(-

6 dB),

±6

kHz

(-60

dB)

Thirty

minutes

after

power-on,

fluctuation

is less than 500 Hz.

AUX

mini-type

...20mV, 300kn

REC

OUT

mini-type

...400mV,

4kn

EP/EXT.

SP

4 - Bn

Fast/Slow

Ratio...12:1

Retardation Ratio...1:9.5 (Fast)

1:114 (Slow)

5 IC's, 3

FEr's,

34

Transistors

RMS

2.0W

10

cm,

4n

4B2(W) x 200(H) x 354(D)mm

8 kg

(without

batteries)

Specifications

subject

to

change

without

notice.

Block Diagram

AF

AMP. POWER

AMP.

SP.

VOLUME BASS TREBLE

MW/SW,

FM

~

25-29MHz

I

FM

COUNTER CIRCUIT

1-----------------------

1

I AMP.

I

.~,

RFAMP.

II

I

O.525-3.0MHz

I

I I

~----------7--------J

I

~:~Qr\i¢pro.d~~tev~r·

reqUire!erViC;;refet.!O~nC~(jtb~~fj~~4r:

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P-anasonj~

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inttieenclosed

Dire~t()ryJor-Con$:Ult'yOYr:·a.ufbo;;.::~

-,tizedPanaSonfC.aijiretfor'detElii.

edinstructlons:

- .

..

.

..

•

-0-

_ _ _

_~

__

_.

_

._

Panasonic Company

Division of Matsushita Electric Corporation of America

One Panasonic

Way,

Secaucus, New Jersey

07094

Matsushita Electric of Hawaii, Inc.

320

Waiakamilo Road, Honolulu, Hawaii 96817

RQX6167ZA

FlO77-0

POWER CIRCUIT

Printed in Japan

Panasonic

Operating

Instructions

RADIO RECEIVER ANTENNA SYSTEM

MODEL NO. RD-9820

Read

these

instructions

completely

before

operating.

--------GENERAL

DESCRIPTION--------

Antenna Coupler

The

Antenna

Coupler

serves

as

a

matching

device

to

connect

the

antenna

to

the

radio

in

such

a

way

as to

obtain

optimum

signal

transfer.

Reception

is

enhanced

and

signal

loss

is

reduced

when

the

impedance

of

the

antenna

and

the

impendance

of

the

receiver's

radio

frequency

(RF)

input

stage

are

the

same. It is

normal

for

an

antenna

and

a

radio

to

exhibit

different

impedances

for

different

radio

wavelengths

(frequencies).

To

overcome

thiS

condition,

the

Antenna

Coupler

is

installed

between

the

antenna

and

the

radio,

and

adjusted

to

obtain

a

suitable

match.

This

Antenna

Coupler

is

designed

for

reception

of

all

types

of

radio

signals

ranging

from

0.5

MHz

to 30 MHz,

and

for

coupling

either

a

balanced,

or

an

unbalanced

type

of

trans-

mission

line.

Antenna

The

antenna

furnished

in

this

system

is an

inverted-L,

long-line

type,

with

an

unbalanced

transmission

line. It

comes

complete

with

a

lightning

arrester

and

grounding

system.

This

type

of

antenna

is

one

of

the

easiest

to

install

and

use. Its

design

is

a

recognized

stan-

dard.

_____

LOCATION

OF

CONTROLS

AND

TERMINALS

____

_

=--+---Tuning

Control

f

.,

Unbalanced Antenna

-m

1

~Hi9h

Impedance

Terminals !

_"

"..jt

I Receiver Terminals

8.I.n~d/Un

••

'.no.d

tOr;

:a

:,OJ

Selector Switch

~

tl

.:'_:it

~

~"'

,~~

~"

~

Balanced Antenna

--rr--L-L----

Low Impedance

Terminals Receiver Terminals

---------CONNECTIONS----------

Inverted-L

Antenna

~

(1

II

'I

Lightning

Arrester

(Knife

Switch)

•

wl'0J

'---.:------1-U

The

shorter.

the

better

Antenna

Coupler

r

(1

10

Reoej'e",

U

·

'~P:::i~er'S

Ground

Terminals

Fig. 1

•

As

this

antenna

is oj the

unbalanced

type.

switch

the

Balanced/Unbalanced

Selector

Switch

to

the

up

position.

• If

the

transmission

line

is an

unbalanced

type.

connect

it

to

the

Unbalanced

Antenna

Terminals

and

place

the

Balanced/Unbalanced

Selector

Switch

in

the

up

position.

For

a

balanced

line.

use

the

Balanced

Antenna

Terminals

and

place

the

Selector

Switch

in

the

down

position.

•

Use

the

Low

Impedance

terminals

to

connect

the

Antenna

Coupler

to

a

receiver

with

a

low

antenna

input

impedance,

and

the

High

Impedance

terminals

to

a

receiver

with

a

high

input

impedance.

If

the

receiver's

input

impedance

is

not

known

use

either

the

Low

or

the

High

Impedance

terminals.

whichever

gives

you

the

best

reception.

•

Connect

the

knife

switch,

as

shown

in Fig.

1.

Place

it

in

the

up

position

to

connect

the

antenna

to

the

radio

when

listening

and in

the

down

position

to

connect

the

antenna

to

ground,

when

not

listening,

particularly

during

an

electrical

storm.

•

Use

the

short

pair

of

leads

that

come

with

this

unit

to

connect

the

coupler

to

the

radio.

•

Select

a

moist

postion

when

burying

the

ground

rod in

the

ground.

-------_ERECTING

THE

ANTENNA--------

I

Mast-!

I

----about

40

feet

--

-

-I

Insulator

1/.

////1////

Fig. 2

Antenna

Leac:--h

Cli~--'-~

'flN';;

Fig. 3

•

Use

the

easiest

way

to

erect

the

antenna,

by

taking

advantage

of

existing

vertical

structures,

poles,

etc. (See Fig. 2.)

•

After

determining

the

length

and

height

of

the

antenna,

secure

the

wi

re at

CD

and @

shown

in

Fig.

2,

by

crimping

the

metal

rings.

• If

necessary

the

plastic

straps

that

come

with

this

unit,

may

be

used

to

secure

the

antenna

leadin

wire

(Fig.

3)

around

the

interior

of

the

house.

Note:

Erect

the

antenna

well

away

from

noise

generating

equipment,

electrical

appliances

etc.

Take

care

that

the

antenna

wire

(between

insulators)

does

not

touch

trees

or

other

structures.

CAUTION: NEVER ERECT AN ANTENNA NEAR HIGH VOLTAGE AND OTHER ELECTRICAL

WIRES. BE AWARE

OFTHE

FACT

THAT

FALLING LINES

COULD

MAKE

CONTACT

IF THEY ARE CLOSE ENOUGH. ALLOW FOR ADEQUATE

CLEARANCE

IN

SUCH

AN EVENT.

------ADJUSTING

THE ANTENNA COUPLER

------

1.

Put

the

Matching

Selector

Switch in the DIRECT

position

(to

connect

the

antenna

directly

to the

receiver.)

2.

Set the

Coupler

Band

Selector

to

the

desired

frequency

band.

3.

Turn

the

radio

receiver

ON, and

tune

it to a

desired

station.

4.

Rotate the

Antenna

Coupler

Matching

Selector

Switch to

the

"A"

position.

S.

Adjust

the

Coupler's

Tuning

Control

for

best

reception.

6.

Repeat

Step S

for

each

of

the

other

Matching

Selector

Switch

positions

"B".

"C"

and

"0",

in

order.

Of

the

four

positions,

select

the

one

that

provides

the

best

reception.

7.

After

determining

the

best position,

further

adjust

the

radio

receiver's

and

the

Antenna

Coupler's

controls.

---------

HELPFUL HINTS

---------

•

This

antenna

is

for

reception

only, it

cannot

be used

for

transmission

purposes.

• To

avoid

damage

to

the

cabinet

and to

the

parts

inside,

do

not

expose

the

coupler

to

direct

sunlight,

heating

equipment.

hot-air

blowers,

etc.

• To

clean

the

cabinet,

wipe

it

with

a

soft

cloth,

dampened

in

diluted

soap

and

water.

Do

not

use

benzine,

thinner,

abrasive

powders,

etc.

•

This

coupler

does

not

require

any

batteries

or

AC

line

power

to operate. It

contains

tuning

circuits

that

operate

without

the

need

for

any

tubes

or

transistors.

PRODUCT SERVICE

Should

this

product

require

service,

please

contact

anyone

of

our

Regional

Parts

Depots.

Their

addresses

are

listed on

the

warranty

card.

For

your

convenience,

fill

in

the

"Customer's

Record"

portion

of

the

warranty

card

and

keep

it

for

future

reference.

Panasonic

Company

Division

of

Matsushita Electric Corporation

of

America

One Panasonic

Way,

Secaucus, New Jersey

07094

Matsushita

Electric

of

Hawaii, Inc.

320

Waiakamilo Road, Honolulu, Hawaii 96817

Panasonic RF -4800 User manual

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