Icom IC-22S PLL Synthesized 2-Meter Transceiver
Instruction Manual and Service Notes
4
SECTION III.
Installation
Unpacking
Carefully remove your transceiver from the packing carton and examine it for signs of
shipping damage. Should any shipping damage be apparent, notify the delivering carrier or
dealer immediately, stating the full extent of the damage. It is recommended you keep the
shipping cartons. In the event of storage, moving, or reshipment becomes necessary, they
come in handy. Accessory hardware, cables, etc. are packed with the transceiver. Make sure
you have not overlooked anything.
Location
Where you place the transceiver in your automobile is not critical and should be governed
by convenience and accessibility. Since the unit is so compact, many mobile possibilities
present themselves. In general, the mobile mounting bracket will provide you with some
guide as to placement. Anyplace where it can be mounted with metal screws, bolts, or pop
rivets will work. For fixed station use, a power supply should be designed to produce 3 amps
for the transceiver.
Power Requirements
The transceiver is supplied ready to operate from any regulated 13.5-volt DC, 2.5 amp
negative ground source. An automobile 12-volt, negative ground system is usually more
than adequate. Some not must be taken, however, of the condition of the vehicle’s electrical
system. Items such as low battery, worn generator/alternator, poor voltage regulator, etc.,
will impair operation of your transceiver as well as the vehicle. High noise generation or low
voltage delivery can be traced to these deficiencies. If an AC power supply other than the
matching supply is used with your transceiver, make certain it is adequately regulated for
both voltage and current. Low voltage while under load will not produce satisfactory results
from your transceiver. Receiver gain and transmitter output will be greatly impaired.
Caution against catastrophic failure of the power supply should be observed.
CAUTION:
Excessive voltage (above 15 volts DC) will cause damage to your
transceiver. Be sure to check the source voltage before plugging in the
power cord.
Included with your transceiver is a DC power cable with plug attached. The red wire is
positive (+) and the black wire is negative (-). If your mobile installation permits, it is best
to connect these wires directly to the battery terminals. This arrangement eliminates
random noise and transient spikes sometimes found springing from automotive accessory
wiring. If such an arrangement is not possible, then any convenient B+ lead in the interior
of the vehicle and negative frame can be utilized. Your transceiver provides an internal DC
filter that will take out a large amount of the transient difficulties anyway. Remember that
the unit operates on a negative ground system only – it cannot be used in a positive ground
automobile.
After making your connections, simply insert the power plug into your transceiver. When
your transceiver is mated with its matching power supply, the power cable from the IC-3PA
is simply plugged into the same receptacle in the transceiver and the AC line cord into any
convenient wall receptacle.
Antenna
The most important single item that will influence the performance of any communication
system is the antenna. For that reason, a good, high quality, gain antenna of 50 ohms
