User's Manual

TY91/TY92 VHF Radio Installation Manual 11 April 2012
00839-00 Issue AA
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Trig Avionics Limited 29
solutions are available. Heavyweight cooking foil meets the technical
requirements, but obviously needs to be properly supported.
5.11.2 Antenna Cable
Use a high quality 50 ohm coaxial cable, such as RG400 or RG142B.
When routing the cable, ensure that you:
 Route the cable away from sources of heat.
 Route the cable away from potential interference sources such as
ignition wiring, 400Hz generators, fluorescent lighting and electric
motors.
 Allow a minimum separation of 300mm (12 inches) from an ADF
antenna cable.
 Keep the cable run as short as possible.
 Avoid routing the cable round tight bends.
 Avoid kinking the cable even temporarily during installation.
 Secure the cable so that it cannot interfere with other systems.
5.11.3 TNC Connector
This section describes the technique for attaching the antenna cable to the
supplied TNC connector.
The supplied connector can be completed using a wide range of commercial
crimp tools (for example the Tyco 5-1814800-3). The die apertures for the
inner pin and the outer shield should be approximately 1.72 mm and 5.41 mm
respectively.
 Strip back the coax cable to the dimensions in the table, as shown in
the diagram below. Slide 25 mm (1 inch) of heat shrink tubing over
the cable.
 Slide the outer crimp sleeve over the cable – it must go on before
securing the centre contact.