BigGameHoundsmen.com

These collars work on the MURS frequency so 153mhz is roughly the middle of the band. A quarter wavelength for this frequency is roughly 18.5" which is what their standard antenna measures. A quarter wave antenna is a common length antenna for all frequencies. The long range antennas are 22.5" which is not a standard wavelength for this frequency as far as I can figure. Can someone please explain to me how you get more gain with an antenna that's not tuned for the frequency it's being used on?

Thanks
Randall

It prob has a coIl in the base of it to get the opedence tuned just right. Like most gain antennas! Anything longer than a 1/4 wavelength antenna usually has this I believe.. I could be wrong just my guess