Transponder Antenna & Battery Placement Nimbus or DUO

Andy wrote:
On Feb 19, 10:25 am, wrote:

Hate external antennas on Composite aircraft. Having worked on a lot
of homebuilts, thought someone else might have come up with an
alternative mount.

I won't help solve your problem but I noted that the Schleicher
ASH31Mi will have a transponder antenna mounted inside the fin as
standard equipment.

Andy


This is interesting as it will probably require some large coax to keep
the antenna loss to less than 1.5 db which is what was recommended in
the microair transponder install manual I have. The RG-58 is limited to
10 ft of coax length and that sure isn't going to get you to the fin
from the instrument panel...

A transponder, such as the Trig Avionics TT21, that has the operating panel
separate from the transmitter/receiver box, will allow the
transmitter/receiver to be installed behind the pilot and thus
considerably reduce the required cable length (and hence losses) to a
tail-fin antenna.

At 03:10 20 February 2009, Gary Emerson wrote:
Andy wrote:

This is interesting as it will probably require some large coax to keep
the antenna loss to less than 1.5 db which is what was recommended in
the microair transponder install manual I have. The RG-58 is limited to

10 ft of coax length and that sure isn't going to get you to the fin
from the instrument panel...

On Feb 18, 8:06*pm, wrote:
Looking for some suggestions on location of Transponder antenna from
people who have them mounted on their Nimbus or DUO.

Looking for area for placement of a 3rd Battery. Do you have a
location that works well?

Thanks in advance for the suggestions.
Mark Mahan
2K

This is not likely helpful for you Mark, sorry but for the non-carbon
types this little gem worked like a charm on my ASW20b, inside the
fusalage, out of sight, no drag & very easy to produce and install.

http://www.as-segelflugzeuge.de/tm/2...2020%20001.pdf

Rick
21