B KY 96A, KY 97A
Rev 4, Apr 2003 IM 006-00674-0004.dwd Page 2-2
NOTE: Use good quality stranded wire with at least 600 V insulation that will not
support a flame.
2.3.1 Avionics Cooling Requirements for Panel Mounted Equipment
The most important contribution to improved reliability of avionics equipment is to limit
the maximum operating temperature of each unit. While modern designs consume
less total energy, the heat dissipated per unit volume (watts/cubic inch) remains much
the same due to contemporary high density packaging techniques. While each indi-
vidual unit may or may not require forced air cooling, the combined heat generated by
several units operating in a typical panel or rack can significantly degrade the reliability
of the equipment if provisions for adequate cooling are not incorporated in the initial
installation.
2.3.2 Mounting Rack Installation
2.3.2.A. The KY 96A, KY 97A is mounted rigidly in the aircraft panel. Select a position
in the panel that is not too close to any high external heat source. Remember
to allow adequate space for installation of cables and connectors. Avoid sharp
bends and placing the cables too near the aircraft control cables.
2.3.2.B. When installing two or more panel mounted units in a stack, the mounting
trays shall be spaced 0.050 inches (0.127 cm) apart. Current production
mounting trays have 0.025 inch (0.064 cm) dimples built in to top and bottom
and both sides so that the trays will automatically be spaced properly.
2.3.2.C. Refer to Figure 2-5 for the KY 96A, KY 97A mounting dimensions. Mark and
cut the mounting holes.
2.3.2.D. Secure the mounting rack to the instrument panel per Figure 2-5 and Figure
2-6. The rear mounting bosses should be attached to the airframe by means
of support brackets.
2.3.3 Antenna Installation
A conventional 50 ohm vertically polarized comm antenna is required with the KY 96A,
KY 97A. Vertical bent whip antennas are not recommended. Wideband comm anten-
TABLE 2-1 Compatible Installations
CURRENT INSTALLATION
KY196A KY197A KY196 KY197
KY96A Compatible YES*1 NO NO NO
KY97A Compatible NO YES*1 NO NO
*1 Will work but backlighting will be too bright and unsuitable, and the audio amplifier
will not function because the current installation is not wired for an audio amplifier.
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