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Radio Tx poorly on ground, but good in the air

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gi(at)av8r.de
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Posted: Mon Nov 03, 2014 4:37 am Post subject: Radio Tx poorly on ground, but good in the air

David, 



is the antenna grounded at the base (contact to the fuselage / metal on metal). It sounds to me like a grounding problem... Maybe there is corrosion around the base of the antenna.



Regards



Georg

Am 03.11.2014 um 13:01 schrieb DaveG601XL <david.m.gallagher(at)ge.com>:






I have a gremlin that I don't know how to troubleshoot.  I have a 601XL all-metal airplane with an Icom A-200 radio, a RAMI com antenna mounted on the top skin and connected with RG-400 cable.  I did all the installation myself.  I have had this flying for 6 years now.  It transmits just fine in the air.  When I initially installed it, I would get comments that it was a bit garbled while transmitting on the ground.  But it was always good enough to be able to operate out of tower controlled airports from time to time.  Receiving wise, I hear just fine whether on the ground or in the air.  



Just this summer, I started to get comments from fellow pilots that I was totally unreadable while transmitting on the ground.  It would become crystal clear as soon as I took off.  Does anyone have any thoughts of why this could be occurring or any place in particular I should start my troubleshooting??



Thanks,



--------

David Gallagher

Zodiac 601 XL-B: flying, 280+ hours now

Next project under construction: Finish my father's Aircamper





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