REFLECTOR: ELT ground plane

Jim Agnew jim_agnew_2 at yahoo.com
Wed Dec 14 08:23:03 CST 2011


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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