REFLECTOR: Transponder Antennas

Timothy Quinlin quinnsct at hotmail.com
Mon Feb 25 15:09:21 CST 2008


In Socal airspace you're constantly getting hit with TCAS interrogations, hence the reply light.  So it could well be that the antenna or something else isn't right.
 
Mike Quinlin




----- Original Message ----- 



From: Craig and Denise Woolston 
To: 'Velocity Aircraft Owners and Builders list' 
Sent: Monday, February 25, 2008 8:05 AM
Subject: REFLECTOR: Transponder Antennas


Hey all-
 
  John and I have a homemade ¼ wave transponder antenna mounted under the battery in the nose of the aircraft (completely) inside.  When we first started flying we got occasional complaints here in SoCal about losing our beacon.  Now it happens much more frequently and it appears to be when we are low and in the “ground clutter”.  The frustrating part is the GTX 330 shows a reply light even when ATC says they can’t see the code.  They are getting a primary but no code.
 
Where have other located their antennas and what type?
 
Has anyone tried the Archer or Advance Electronics Antennas I see in AS?
 
Craig
250hrs…XL-5FG Flying in Lancaster, CA
 



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