B
ATCRBS TRANSPONDER
KT 76C
Rev 3, May 2004
IM 006-10545-0003.dwd
Page 2-3
B.
Primary Power and Circuit Breaker Requirements and Wiring
The KT 76C transponder receives primary power from an aircraft by aircraft
power circuit breakers. The KT 76C is designed to operate from 11-33 V dc.
Power connections, wire sizes, and circuit breaker requirements are shown
on the interconnection diagram
Figure 2-2.
2.3.4 EQUIPMENT
LOCATION
Care should be exercised to avoid mounting components near equipment operating with high
pulse current or high power outputs such as radar and satellite communications equipment. In
general, the equipment should be installed in a location convenient for operation, inspection, and
maintenance, and in an area free from excessive vibration, heat, and noise generating sources.
All mechanical installation drawings, connector assembly diagrams, interconnect diagrams, and
connector pin assignment tables referenced in this section are located at the end of this section
of the manual. Determine the mounting location for system components following the guidelines
below.
Prior to installing any equipment, make a continuity check of all wires and cables associated with
the system. Then apply power and check for proper voltages at system connectors, and then re-
move power before completing the installation.
A.
Transponder And Mounting Tray Locations
The tray-mounted KT 76C ATCRBS Transponder can be installed in any con-
venient location on the panel that is free from excessive heat and vibration
and which provides reasonable access for inspection and maintenance. To
achieve maximum performance, the KT 76C should be installed adjacent to
other receivers with similar functions.
To allow for inspection or repair of the wiring of the connector assembly itself,
sufficient lead length should be left so that when the mounting hardware for
the rear connectors and antenna coaxial cable is removed the assembly may
be pulled forward several inches. Also, a bend should be made in the harness
(at the rear connectors) to allow water droplets that might form on the harness
due to condensation, to drip off at the bend and not collect in the connection.
Except for antenna cables, (see
Figure 2-5
)
the length of cables from the
KT 76C transponder mounting tray connector to other system units is not crit-
ical because unit interfaces are designed with high impedance inputs, low im-
pedance outputs, and low noise susceptibility characteristics.
Forced air cooling is recommended but is not a requirement. Outline drawing
Figure 2-3
shows transponder and mounting tray dimensions.
B. Antenna
(see
Figure 2-4
)
The KT 76C antenna should be well removed from other antenna projections,
the engine(s), and propeller(s). It should also be well removed from landing
gear doors, access doors, or other openings which will break the ground
plane for the antenna as a surface directly beneath the antenna should be a
flat plane over as large area as possible.
A back-plate should be used for added strength on thin-skinned aircraft.
Summary of Contents for BendixKing KT 76C
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