Join Date: Jan 2003
Location: Escondido, California
Yes the Firestick FS series of antennas are all tunable. To me, the 4' is too tall for that mounting location, I'd go no taller than the 3' and actually, I converted from my previous Firestick FS-3 to a FS-2 to clear my garage door. Both the 2' and 3' FS Firestick antennas tune fine, my 2' SWR is probably at about 1.2:1 which is very good. For offroad use, even the 2' works extremely well, I noticed zero performance difference offroad after converting from the 3' to the 2' Firestick which is a very good offroad antenna.
Take pains to correctly assemble & mount the antenna mount, particularly make sure the insulated shoulder washer that is part of the mount gets properly installed in the right location. When that shoulder washer is left out or is installed incorrectly, the antenna won't work properly & it will be impossible to tune the antenna to make it perform well. Its job is to electrically insulate/isolate the antenna itself from the the mount which is crucial to the antenna working properly.
Good decision on the Uniden PRO-520XL, that's a great radio that is pretty much bulletproof. I've had that exact radio in two different Wrangler TJs.
When you have a choice, buy American made.
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