9
HF
TRANSCEIVER
PILOT'S OPERATING HANDBOOK
(TYPE PT10-A)
SUPPLEMENT
SECTION 5
PERFORMANCE
There is no change to the airplane performance when this avionic
equipment is installed. However, the installation of an externally mounted
antenna or several related external antennas, will result in a minor
reduction in cruise performance.
4
1 July 1979
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PILOT'S OPERATING HANDBOOK
SSB
HF
TRANSCEIVER
SUPPLEMENT
(TYPE ASB-125)
SUPPLEMENT
SSB
HF
TRANSCEIVER
(TYPE ASB-.25)
SECTION .
GENERAL
The ASB-125
HF
transceiver is an airborne, 10-channel, single side-
band (SSB) radio with a compatible amplitude modulated (AM)
transmitting-receiving system for long range voice communications in
the 2 to 18 MHz frequency range. The system consists of a panel mounted
receiver/exciter, a remote mounted power amplifier/power supply, an
antenna coupler and an externally mounted, fixed wire, medium/high
frequency antenna.
A channel selector knob determines the operating frequency of the
transceiver which has predetermined crystals installed to provide the
desired operating frequencies. A mode selector control is provided to
supply the type of emission required for the channel, either sideband, AM
or telephone for public correspondence. An audio knob, clarifier knob and
squelch knob are provided to assist in audio operation during receive. In
addition to the aforementioned controls, which are all located on the
receiver/exciter, a meter is incorporated to provide antenna loading
readouts.
The system utilizes the airplane microphone, headphone and speaker.
Operation and description of the audio control panel used in conjunction
with this radio is shown and described in Section 7 of this handbook.
1 July 1979
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