REFLECTOR: ELT ground plane

[Laurence Coen]

I also used copper foil on the center spar.  The provided 1/2 wave whip is designed to go on a spam can.  A dipole works better on glass planes besides being light easy and cheap.

Larry Coen
N136LC


From: Jim Agnew 
Sent: Wednesday, December 14, 2011 8:23 AM
To: Velocity Aircraft Owners and Builders list 
Subject: Re: REFLECTOR: ELT ground plane


Here is where I put  mine on the strongest part of the plane.  You can see that it is a dual frequency antenna and it works well.


James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying


  From: David Ullman <ullman at robustdecisions.com>
  To: reflector at tvbf.org 
  Sent: Wednesday, December 14, 2011 9:00 AM
  Subject: Re: REFLECTOR: ELT ground plane

  I have the same ACK ELT and had to do experiments to find a place that it
  would work.  I first mounted it over the sump using a ground plane made of a
  thin sheet of glass with an aluminum foil veneer.  This is a smaller ground
  plane than is called for and didn't work because the antenna was too close
  to the fuel vent pipes.  I then did a series of experiments and finally
  mounted it in the pilot side strake interior pocket up against the fuel tank
  wall with the ground plane at the rear and only about 6" x 10" and the
  antenna itself mounted on the ground plane and aimed forward.  It tucks in
  the upper outboard corner very nicely and I will put some upholstery around
  it to make it visually disappear.    I can send pictures tomorrow, if anyone
  wants them.  This passed all the self testing.

  David Ullman
  N-444DX Velocity 
  EAA 292 President
  david at davidullman.com
  541-754-3609
  *************************

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