Installing An Antenna; Making The Connections - Radio Shack HTA-20 Owner's Manual

INSTALLING AN ANTENNA
Be sure to use the amplifier only with a high power
antenna. Consult your local Radio Shack store for as-
sistance in selecting an appropriate antenna.
Caution: Due to the amplifier's high power output, a low
power antenna will get hot within a few minutes after
starting transmissions. An over-heated antenna causes
SWR (Standing Wave Radio) degradation which can
damage the RF power transistor, and in some cases,
damage or destroy the antenna.
• When selecting the antenna's mounting location:
• Mount the antenna vertically and as high as possible on
a vehicle.
• Mount the antenna and route the RF cable as far as
possible away from electrical noise sources (ignition
system, gauges, etc.).
Follow the mounting instructions supplied with the
antenna, then route the antenna's RF cable to the am-
plifier.
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Caution: Do not run the cable:
• Over sharp edges or moving parts that might damage
the cable.
• Next to power cables or other communication unit's
antenna cables.
• Through the engine compartment or other areas that
produce extreme heat.
MAKING THE CONNECTIONS
Cautions:
• When used in a vehicle, the amplifier is designed to
work with a 12-volt, negative ground electrical system.
If you are unsure about your vehicle's electrical system
type, check with your vehicle's dealer.
• To avoid damage to the amplifier's RF power transistor
when you use a DC power supply instead of a vehicle's
12-voltelectrical system, use only a power supply(such as
Cat. No. 22-120)that is fully protectedagainst over-voltage
and high frequency intrusion and is capable of supplying
high current.
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