REFLECTOR: Transponder antenna

Douglas Holub doug.holub at tx.rr.com
Sat May 19 19:33:53 CDT 2007


That's what I did, too. 

Does the comm antenna in the winglet work well? 

Doug
----- Original Message ----- 
  From: Al Gietzen 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Saturday, May 19, 2007 5:37 PM
  Subject: Re: REFLECTOR: Transponder antenna


  I mounted my transponder antenna in the strake at the wing-strake joint.  I have had chronic problems with reception, particularly when the ground station is on the side away from the antenna position. In this case, the ground station can usually pick me up, at least for a while, if I rock my wings.  I have a King transponder/antenna.

  What's the latest thinking on mounting the transponder antenna for maximum range?

  Manny Lewis



  Manny;



  A contributing factor is likely the long antenna lead from the unit.  The transponder signal likes a short lead.  Also, being on one side makes it subject to shadowing.  I mounted mine between the battery holder and the canard bulkhead, below the retract pump. It puts it low in the plane, and close to the panel. Tight fit, works fine.  First photo is antenna and ¼ wave ground plain, second photo is antenna installed.



  Hope this helps,



  Al



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