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#22
December 31st 17, 06:03 PM
posted to rec.aviation.soaring
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ASW27 Trasponder Antenna Installation Inside Fuselage.
On Sunday, December 31, 2017 at 7:33:39 AM UTC-6, wrote:
AC 43.13B 308d says you need a backing ground plane. But I didn't see any special details for CF versus other composites? Following the instructions from the glider manufacturer seems smart. My std Cirrus has a schempp-Hirth TN that clearly spells out the installation of the blade antenna. but it allows either aluminum or copper for a ground plane. I chose a copper plate 0f .043 thick. Trigg 22 has good output, but the 'sensitivity' was right on the low tolerance. Any thoughts or insights? thanks, Scott 
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