Ka 44B Adf Antenna - Honeywell BENDIX/KING KTR 2280 System Installation Manual

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2.3.4.3 KA 44B ADF ANTENNA

The antenna installation will determine, to a large extent, whether the ADF will give
optimum performance (refer to
DRAWING (-0000) /
as required. The KA 44B antenna contains both the loop and sense antennas. The
following considerations should be taken into account before selecting a location for the
antenna:
CAUTION: KEEP THE ANTENNA AT LEAST 4 FEET AWAY FROM DME OR
TRANSPONDER ANTENNAS TO MINIMIZE L-BAND INTERFERENCE.
THE ANTENNA SHOULD BE MOUNTED WELL CLEAR OF THE
AIRCRAFT GENERATOR/ALTERNATOR AND WELL CLEAR OF ANY
GENERATOR/ALTERNATOR CABLES.
CAUTION: DO NOT ROUTE THE CABLES ALONG WITH HIGH LEVEL
TRANSMITTING CABLES. DO NOT ROUTE THE CABLES WITH OR
NEAR ALTERNATOR OR 400HZ CABLES. MAKE SURE THAT THE
CABLES DO NOT INTERFERE WITH ANY OF THE AIRCRAFT CONTROL
CABLES.
• Mount the antenna on the center line of the aircraft fuselage. Failure to do so may
result in excessive Q.E. error.
• If the antenna is to be top mounted, select a location where shadowing from the wings,
etc., is minimized.
• The antenna should be well removed from any projections such as engines and
propellers, as well as landing gear doors, access doors or other openings which will
break the ground plane for the antenna.
• Use the template included in the installation kit to mark the mounting holes on the
aircraft fuselage.
• Drill and/or punch the required holes.
• Use a piece of fine sandpaper or emery cloth to sand the area on the fuselage skin on
which the doubler plate is to be mounted.
• Apply Alumiprep No. 33, P/N 016-01127-0000, to both the inside area of the fuselage
and the back of the doubler plate, following the directions on the container to cleanse
the metal of any residue.
• Apply Alodine No. 1001, P/N 016-00128-0000, to both locations following the
directions on the container. This is used to ensure good bonding and prevent
oxidation.
• Refer to the installation manual and mount the antenna as shown. First rivet the
doubler plate in place. It is imperative that the doubler plate make a good ground plane
contact with the inside of the aircraft skin.
Rev. 0, Aug/2006
©Honeywell International Inc. Do not print without express permission of Honeywell
FIGURE 2-5 KA 44B OUTLINE AND MOUNTING
FIGURE 2-6 KA 44B OUTLINE AND MOUNTING DRAWING (-0010)
KTR 2280 Preliminary H 08/17/06
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