"Buff5200" wrote in message
...
You could try the Ham radio market. What you are looking for is an
Antenna Tuner
for the 70cm band. What you want is an antenna tuner that can capactively
"shorten" the 22" aircraft antenna and cause it to match the frequencies
that would
normally use a 17" antenna. You might want to look at www.aesham.com.

No. The 70 cm amateur band is around 440 MHz -- way above 160 MHz.
The marine frequencies would be closest to 2 meters, and not all that close.

I think a dedicated antenna is going to be simpler, cheaper, and work
better.

Jim, I believe at one time you posted a pointer to an advisory circular of
best practices for installing non-aviation band radios in aircraft. Maybe
you could dig that out again.

Tim Ward