Ameri-King AK-451-ELT - Manual (Page 36)

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Installation Preparation:
1.
Prepare the surface for antenna installations in such a manner to ensure a
ground contact of less than 0.003Ω. If bare metal surfaces are needed for
surface preparation they should be treated with Alodine® 1200(or similar
compound) to eliminate aluminum oxidation.
2.
Drill 0.562" hole in aircraft skin.
Type of aircraft:
The AK 451.017-1B Whip Antenna is designed for installation on fixed wing
subsonic aircraft with reciprocating engines and is rated for a maximum airspeed of
300 KIAS (Knots Indicated Airspeed at Sea Level)
Installation:
1.
Metal adapter plates are optional but they should be used if the curvature or
compound radius of the aircraft skin is such that antennas cannot be directly
installed vertically with their plates mounted flat to the aircraft outer surface.
2.
Backing plates or doublers should be installed to ensure adequate structural
strength for associated air loading during flight. Refer to FAA Advisory
Circular 43.13-2B for complete information.
3.
Remove the 1/2-28 hex nut and external tooth lock washer from the base of the
antenna. Insert antenna connector through mounting hole, make sure the "O"
ring remains in the base of the antenna connector flange groove and that the
connector has sufficient clearance through the aircraft skin. To mount the
antenna, place the lock washer and the hex nut on the inside of the aircraft and
sandwich the aircraft skin between the base of the antenna and lock washer
followed by the hex unit. Tighten the hex nut to between 25 to 30 inch lbs.
4.
Apply a small, smooth fillet with RTV sealant around the periphery of the
antenna base to seal of moisture.
5.
For maximum signal strength, the length of the antenna coax to the ELT
should be as short as possible (use of the standard 6-foot coax is recommended
when possible).
Composite Aircraft Installation:
Except for preparation instructions and installation of a ground plane, installation is
the same. Refer to FAA Advisory Circular 43.13-2B, Section 310 for complete
information. (See Appendix C)