Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25204
Location: Livermore CA USA
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 Posted: Sun Jul 22, 2012 6:09 pm Post subject: ADS600-B vs. Transponder Antenna Locations... |
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Dear Listers,
The manual for the NavWorx ADS600-B says that the normal transponder antenna and the UAT antenna "MUST be at least 5 feet apart". On an RV-8, that presents somewhat of a problem. Realistically, the farthest forward you can mount a transponder fin is just behind the main spar under the aileron pushrods. 5 feet back from that point is right under the rear-mounted battery box! That means that the next realistic place is right behind the elevator bellcrank and behind bulkhead F-808. The coax w/ TNC connector on one end that comes with the ADS600-B is just long enough to make it to the forward position. I was thinking of mounting the transponder antenna (Garmin GTX-237) in the aft position as described above and using RG-400.
But that's pretty far back for a transponder antenna. I've never seen one mounted there before. Any reason why I wouldn't want to mount it there?
The only other option would be to mount it out on the wing somewhere to maintain the 5' separation. But that's even goofier, it seems to me...
Thoughts?
Thanks,
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Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 172+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
RV-6 #20916 N360EM "The Flyer"
http://www.mattsrv6.com - Matt's RV-6 Revitalization Log
Status: 110+ Hours Since Purchase - Upgrades Complete; Now In Full Flyer Mode
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