The length of the coax is irrelevant because the coax is a 50 Ohms
transnission line in between a 50 Ohms connection on the transceicver
end and (hopefully) 50 Ohms at the antenna feed point.

So nothing is reflected here (but what is reflected at the Antenna is
transmitted back to the Tx).

If the coax is longer attenuation comes into play but in a glider this
is not an issue.

George

ContestID67 wrote:

I was curious about the length of the coax. I was under the
impression that to get the maximum power out of the antenna, that the
combined total length of the coax *AND* the antenna needs to be taken
into consideration and needs to be an even number of wavelengths.
That prevents power from reflecting at the tip of the antenna and then
back into the trasceiver. This can not only rob radiated power but
might also damage the transceiver. A VSWR meter is used to tune this
for maximum radiated power typically by adjusting the length of the
antenna.