Icom IC-751A Instruction Manual page 19

SECTION 4 INSTALLATION
4-1 PLANNING
• PRECAUTIONS
4- 2 MOUNTING THE TRANSCEIVER
4-3 ANTENNA
•MOBILE ANTENNA
NOTE: To install the AH-2, an OPC-137 inter-
face cable must be purchased separately.
Select a location for your transceiver which allows free access to the
front panel contrais, good air circulation and rear clearance for
access to the rear panel connections.
• Mobile or marine installations:
An optional IC-MB18 mounting bracket is available to mount your
IC-751A. Select a location which can support the weight of the
unit, and which does not interfere with the normal operation of
the vehicle or boat. Provide protection from direct rain on boats. -
Avoid
using the IC-751A in the following situations:
1) Where temperatures under -10°C or over +60°C are encountered.
For example, DO NOT use the IC-751A in areas exposed to direct
sunlight or near heat-producing devices such as heaters or ranges.
2) ln humid or moist places including bathrooms.
DO NOT run the antenna feedline near electronic instruments or
magnetic compasses.
The optonal IC-MB18 mounting bracket allows installation of the
transceiver to a surface over the IC-751A. When mounting the
transceiver aboard a boat, place the bracj<et in a location which
minimizes vibration and wave shock.
Antennas play a very important role in radio communication. If
the antenna is inferior, your transceiver cannot give you the best
performance. A well-matched 50 ohm antenna and feedline will
provide the desired performance.
Si nce the I C-751 A cornes standard with a general coverage receiver,
it is recommended that a long wire antenna and antenna tuner be
used when receiving outside the Amateur bands. The tuner will
ensure there is a matched condition at all times. An Amateur band
antenna generally does not give adequate performance when used on
frequencies for which it was not designed.
The ICOM AH-2 Antenna System may be bumper-mounted, plus it
offers automatic band switching and tuning in unison with the
IC:751A.
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