Transponder installation

Got a question for all you radioheads out there. I am installing a Becker Xnder and I notice my other glider has a 8"x8" or so grounding plane attached (glue?) on the inside where the antenna is mounted.
Question??? I need ground plane information such as size, thickness, installation tips, do's and don't, ideas.
The Becker is a 250 watts version and I will be using a small 2.5" wire rod type antenna.
Thank you all,
R

On Saturday, January 18, 2014 1:10:46 PM UTC-5, who's me? wrote:
Got a question for all you radioheads out there. I am installing a Becker Xnder and I notice my other glider has a 8"x8" or so grounding plane attached (glue?) on the inside where the antenna is mounted. Question??? I need ground plane information such as size, thickness, installation tips, do's and don't, ideas. The Becker is a 250 watts version and I will be using a small 2.5" wire rod type antenna. Thank you all, R

Thickness does not matter. I usually use a piece of .016 aluminum. Installation manual should define sise, but about 5 inches in diameter is what I recall.
On glass ship it can go inside. On carbon ship I put on outside behind the gear with 2 sided tape.
UH

who's me? wrote, On 1/18/2014 10:10 AM:
Got a question for all you radioheads out there. I am installing a
Becker Xnder and I notice my other glider has a 8"x8" or so grounding
plane attached (glue?) on the inside where the antenna is mounted.
Question??? I need ground plane information such as size, thickness,
installation tips, do's and don't, ideas. The Becker is a 250 watts
version and I will be using a small 2.5" wire rod type antenna. Thank
you all, R

The glider manufacturer may have a document showing the "correct"
installation, if not UH's comments apply.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl

I installed my ground plane inside my carbon fuselage. Used a blade antenna
just aft of the gear doors and offset slightly to the right due to the
thickness of the fuselage at the glue joint. Passed transponder test at
avionics shop and is clearly visible to ATC.


wrote in message
...
On Saturday, January 18, 2014 1:10:46 PM UTC-5, who's me? wrote:
Got a question for all you radioheads out there. I am installing a Becker
Xnder and I notice my other glider has a 8"x8" or so grounding plane
attached (glue?) on the inside where the antenna is mounted. Question??? I
need ground plane information such as size, thickness, installation tips,
do's and don't, ideas. The Becker is a 250 watts version and I will be
using a small 2.5" wire rod type antenna. Thank you all, R

Thickness does not matter. I usually use a piece of .016 aluminum.
Installation manual should define sise, but about 5 inches in diameter is
what I recall.
On glass ship it can go inside. On carbon ship I put on outside behind the
gear with 2 sided tape.
UH

On Saturday, January 18, 2014 4:22:19 PM UTC-8, Dan Marotta wrote:
I installed my ground plane inside my carbon fuselage. Used a blade antenna

just aft of the gear doors and offset slightly to the right due to the

thickness of the fuselage at the glue joint. Passed transponder test at

avionics shop and is clearly visible to ATC.





wrote in message

...

On Saturday, January 18, 2014 1:10:46 PM UTC-5, who's me? wrote:

Got a question for all you radioheads out there. I am installing a Becker

Xnder and I notice my other glider has a 8"x8" or so grounding plane

attached (glue?) on the inside where the antenna is mounted. Question??? I

need ground plane information such as size, thickness, installation tips,

do's and don't, ideas. The Becker is a 250 watts version and I will be

using a small 2.5" wire rod type antenna. Thank you all, R



Thickness does not matter. I usually use a piece of .016 aluminum.

Installation manual should define sise, but about 5 inches in diameter is

what I recall.

On glass ship it can go inside. On carbon ship I put on outside behind the

gear with 2 sided tape.

UH

Or use a di-pole antenna that doesn't need a ground plane. I mounted mine all inside the fuselage just forward of the rudder.
JJ