Leerjet 35/36 Developed for Training Purposes 4A-9
February 2007
Avionics
Communications
VHF Communication Transceivers
The Learjet 35/36 has dual Collins VHF-20 or Triple Wulfsberg
WT-200 transceivers in the nose compartment; their control
heads are in the central instrument panel. The Collins VHF-20A
and Wulfsberg WT-200 are 700-channel VHF receiver-trans-
mitters with a frequency range of 118.000 to 135.975 MHZ in
25 kHz steps. The Collins VHF-20B has an extended range of
118,000 to 151.975 MHZ in 25 kHz steps.
Audio Control Panel
Two audio control panels provide individual audio selection by
each pilot. A three-position switch (SPKR-PHONE/PH/EMER)
enables audio inputs to be selected. Audio inputs from all com
munications and navigation receivers can also be selected.
HF Communication Receiver
The Learjet may have a single Collins HF-220 HF transceiver in
the nose compartment and a CTL-220 control head on the cen-
tral pedestal or a single Collins 718-U-5 HF transceiver. The
HF-220 system covers the 2.0 to 22.9999 MHZ frequency
range with single-sideband (SSB), AM, and split-channel,
reduced-carrier telephone modes.
Radio Telephone
A Wulfsberg Flitephone III C radio telephone allows pilots and
passengers to communicate with the ground through the public
telephone system. It also operates as an intercom for cockpit to
cabin communications.
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