Electra bearcat IV Betriebsanleitung - Seite 3

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INSTALTATION

This receiver is shipped complete with the necessary ac-

cessories for mobile or table use. As a fixed receiver in areas

of fair-to-good signal strength, the telescoping whip antenna

supplied. may be used on all bands.

If an outside antenna is necessary for fringe reception, you

may use a l55mHz antenna on all bands, a 40mHz antenna for

L and H bands or a 460mHz antenna on U band only. Exter-

nal antennas should be coupled to the receiver by 50 ohm

coaxial cable, such as RG-58 A/U, using the supplied auto-

motive type connector.

Suitable antennas are available at

most radio dealers.

INSTRUCTIONS

The BC-4 has high noise immunity because of the noise

squelch system. However, the noise generated by the auto

electrical system and other parts of the car is sometimes a

problem, particularly in areas of low signal strength. The sub-

ject of noise elimination is too lengthy to deal with adequate-

ly in this instruction book.

It is recommended for those who wish to become familiar

with the subject to purchase "The Radio Amateur's Hand-

book" or

"The

Mobile Manual" published by the American

Radio Relay l,eague and sold by most electronic parts stores.

It is further recommended that the vehicle be taken to a ser-

vice center which specializes in VHF-UHF two way radio

communications equipment for correction of a noise problem.

M O B I L E I N S T A L L A T I O N

This receiver may be installed in any car, truck, boat, etc.,

having a 12 VOLT NEGATIVE GROUND SYSTEM.

[n some areas it is illegal for unauthorized persons to

receive police communications on a mobile receiver. The user

of this radio is responsible for obtaining any necessary author-

ization through local agencies and Electra Company cannot

he responsible for any illegal installation or usage.

Place the mobile mounting bracket under.the dash to

hold the receiver in the desired position.

Mark and drill two holes using a 7164 drill bit and

secure the bracket with the two No. 6 self-tapping

screws.

Insert the two plastic

"T"

washers, flanges turned

inward, in the desired pair of mounting holes and

secure the receiver in place with the twoIl4-20bolts

and two ll4" lD x 9l16" OD flat washers.

Attach the DC power cable and connect it to the

"acccssory"

"radio"

terminal on the fuse block.

External mobile antennas may be used as described

above. The autornotive antenna may be used fully

extended for L or H bands. It should be reduced to

approximately lB" for U bands.

OPE RATI ON

Mth the power cable and antenna properly connected,

turn the receiver ON by rotating the "VO[,UME"

control clockwise.

Place the B channel switches in the up (ON) position.

Set the "MANUAL-SCAN" switch on "MANUA[,".

Adjust the "SQUELCH" control clockwise until the

rushing noise is heard. Then adjust the "SQUE[,CH"

control counterclockwise until the rushing noise dis-

apPears.

Press the "MANUA[,-SCAN" switch downward and

continue to step through all channels. If the noise

should "break the squelch" on any channel, adjust

the squelch control counterclockwise again slightly

to quiet the receiver. THIS MUST BE DONE BE-

TWEEN STATION TRANSMISSIONS.

The "MANUAL-SCAN" switch may now be used

to select and monitor any desired cl"rannel.

To sample all channels automatically, return the "MAN-

UAL-SCAN" switch to "SCAN".

Any channel may

be omitted as desired by moving the individual channel

switch downward ("f0.

l .

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