Antenna and Coax Length

John Scott wrote:
My glider has a dipole antenna built into the rear edge of the rudder. How
do I tune the VSWR for this antenna. Cutting a chunk off is not possible.

John

Rear edge? Odd, most gliders have them in the leading edge of the
vertical stabilizer.

Anyway, the bottom line is that you cannot change the length of the
antenna. We are all [retty much in the same boat. It would be great
if we could retune the antenna (change the length) for 123.3 (or
whatever frequency you use). This would optimize our power out.

However, this is not practical so we live with antennas that are
probably optimized only for the middle of the 118.000 - 136.975Mhz
range. What is the middle? 127.4875Mhz. This is at least pretty
close to where we usually transmit.