At 17:51 25 March 2012, Martin Gregorie wrote:
On Sun, 25 Mar 2012 09:50:24 -0700, cfinn wrote:

I know this is dangerous, but I've been thinking. What about
using the
TE probe for mounting? The tail style TE probe extends 12 to
18 inches
from the crabon fiber tail. It could be secured a few inches
behind the
probe pressure openings, so it wouldn't interfer with air flow
over the
sensors. Of course you would need to install a connector, so
it could be
removed.

Dolba & Dolba make and sell a variety of FLARM antennae for
Europe: foil
stick-ons, flat plate and rod antennae. It might be worthwhile
asking if
they can supply them for the PF using the US frequency. I was
put onto
them by Glasfaser when I was looking for FLARM antennae for
my Libelle.

Here's a URL: http://www.dolba.de/index.html



--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |


Martin,
I am afraid, that antenna is not the problem, it's the positioning
of it. You can install yagi -type antenna, that has high gain in
one direction, but then you are not visible in other directions.
Also, if antenna has high gain, it typically has low overall efficiency.
Same stands for receiving.
Dipole if efficient and near optimal antenna in this application,
IMHO.
-kh