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-   -   How to mount transponder antenna for proper grounding? (https://vansairforce.net/community/showthread.php?t=151289)

9GT 12-23-2017 09:02 AM

You can rarely go wrong when following manufacturer instructions. When all else fails, follow the directions.

deek 12-23-2017 09:33 AM

Quote:

Originally Posted by BobTurner (Post 1227335)
No. You want the coax’s braid-shield electrically attached to a ‘ground plane’ (usually the aircraft skin around and under the antenna) with as short a connection as possible. Lengths matter. The ground plane does not actually have to be attached to aircraft ground, although it usually is.

Yep. There are thousands of composite homebuilts flying that don't have the transponder antenna ground planes (often aluminum discs) bonded to aircraft ground...and their transponders work fine.


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