Installation Guide

SV-COM-760, SV-COM-T25 and SV-COM-T83 Installation and Configuration
SkyView System Installation Guide – Revision AK (draft) 16-19
Antenna TNC Connector
BNC connectors are more common for COM radio installations than TNC
connectors. TNC Male to BNC Female adapters such as Amphenol P/N 242149 are
readily available and inexpensive and will allow an antenna system terminated in a
BNC Male connector to be used with the SV-COM-T25/T8.
This section describes the technique for attaching the antenna cable to a TNC connector. A TNC
connector is not supplied with the SV-COM-X25/X83. The SV-COM-T25/T8 has a TNC Female
connector. Therefore, you will need to source a TNC Male connector that is compatible with the
antenna cable type that meets your aircraft’s needs.
A dual crimp style TNC 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 center
contact.
Dimension
Cut size
(mm)
Cut size
(inches)
A
17.5
0.69
B
7.2
0.28
C
4.8
0.19
• Crimp the center contact to the cable.
• Insert the cable into the connector – the center contact should click into place in the body,
the inner shield should be inside the body of the connector and the outer shield should be
outside the body.
• Crimp the outer sleeve over the shield.
• Slide heat shrink tubing forward (flush to connector) and heat to shrink the tubing.