Massive Audio DB8000 Manuel d'utilisateur télécharger pdf (Page 24)

FULL}"

EQUIPPED

FOR

IMMEDIATE OPERATION

ON

ALL

23

CHANNELS

ay

oui

with

the

NEW

CAM-88

23-

CHANNEL CB

mobile and

hase station

AM

TRANSCEIVER

GREATER RANGE

POWER with the exclusive

new DYNA

-BOOST

circuit

that intensifies

speech

signals and extends the

signal

range.

The

new

Cobra

CAM -88 is rugged, handsome and

field

proven.

Compare it, feature for feature, with

other

CB equipment

and you'll be convinced

that

the Cobra

CAM -88 is by

far

the beat.

Outstanding

Features

Fully- Equipped for Immediate

23- channel

Transmit

and Receive

Double

Conversion

Superheterodyne

Receiver

Transistorized

117V AC

/12V DC

Power

Supply

Speech Compression with Switch

Delta

-Tune

Fine Tuning

Squelch

Control and Standby Switch

Illuminated

Dual-

Purpose

Meter

Power

-in (Receive)

-Power

-out

(Transmit)

Modulation

Indicator

Detachable Press

-to -talk

Microphone

Convertible to a

Public

Address Amplifier

Carefully

engineered design

makes the Cobra

com-

pletely reliable

and

easy to operate. Completely

self-

contained.

No

additional cr ystals needed.

121495

DIVISION

OF DYNASCAN

CORPORATION

1801W. BELLE

PLAT

NE

AVE. CHICAGO,

ILL.

60613

Export: Empire Exporters, 123 Grand St.

New York

13, U.S.A.

Also

available

m

Canada

CIRCLE NO. ON

READER

SERVICE PAGE

26

=TIPS

_METHODS

e

IDEAS

GADGETS

=

TECHNIQUES

DEVICES

PROTECTION

AGAINST

WRONG POLARITY APPLICATIONS

If

a diode is connected

between your power

supply and the

load, the

wrong voltage

polar-

ity can be

prevented

from

getting

to your

equipment and damaging components.

How-

ever, the diode would have to handle the full

current drawn by

the

load. You can get

better

results if

the contacts

of a relay

carry the

load current, leaving

only the

small

amount

of current

needed

to energize the

relay to

be

passed by the diode. Connect a

diode

and re-

lay as shown.

When

the

voltage

is of proper

POWER

SUPPLY

LOAD

polarity, the diode

conducts

and causes

the

relay to energize, applying the full power

supply

voltage

to the

load. If the polarity is

reversed,

the diode doesn't

conduct

and the

relay

stays

open. Use a sensitive

(5 -mA

to

10mA), normally

open s.p.s.t.

relay whose

contacts can handle the current drawn

by

the

load. -Mahaveerchand Bhandari

KEEP

YOUR CW KEY CLEAN

WITH

A "DUST COVER"

Here's a

handy way

to prevent dust from

"bugging" your key

and to reduce the danger

of shocks

where high voltage

is present.

Take

a

com-

mon plastic

food container

that

measures

about 2 1/2"

deep

by

3"

in

diam-

eter,

and

cut

openings in

it

to clear

the

key,

the short-

ing lever -if

any

-and

connecting cable. Then

place

the

container over the key. The resulting "dust

cover" can also house a click filter, if

you

use

one.

Plastic food

containers are

available

from most

dime stores

for about 29 cents.

-Stephen

Stone

WNIFSU

(Continued

on

page

30)

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