Schematic diagram of
IC-HM12
Wiring for straight key.
9
Avoid connecting the ANTENNA CONNECTOR to open feedlines,
and do not transmit under mismatched conditions. Operating the
transmitter under these conditions could result in damage to the
IC-735.
n
MOBILE ANTENNA
4 - 4 MICROPHONE
Since the IC-735 comes standard with a general coverage receiver, it
is recommended that a long-wire antenna and antenna coupler be
used. The coupler will ensure there is a matched condition at all
times. A Ham band antenna generally does not give adequate
performance when used on frequencies for which it was not designed.
ICOM's AH-2 HF ALL BAND ANTENNA TUNER can be easily
bumper mounted for mobile use, offering automatic band switching
and tuning in unison with the IC-735. With a 2.5 meter antenna, the
AH-2 can fully cover 3.5 to 30MHz.
One push of the TUNE SWITCH on the AH-2 automatically changes
the IC-735 emission mode to FM and output power to 10 watts for
tuning the AH-2 on the frequency.
The supplied IC-HM12 electret condenser hand microphone or
optional SM-8 desk microphone may be used. Merely plug it into
the MIC CONNECTOR on the front panel. If you wish to use a
different microphone, make certain it has the proper output level.
Particular care must be exercised when wiring a different micro-
phone since the transceiver internal electrical switching system is
dependent upon the correct connections. Refer to the schematics
for the proper hookup.
4 - 5 CW KEY
For CW operation, connect a CW key to the KEY JACK using the
supplied standard 1/4 inch, 3-conductor plug. See the diagrams for
connection details.
Observe the correct polarity of all leads when wiring. Note that the
keyed voltage when switching with semiconductors or relays with
resistors in the circuit must be less than 0.4 volts.
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