natsb88 wrote:Rodebaugh wrote:It is mounted between my gate and spare.MaxGravy wrote:The CB whip belongs on the FRONT bumper. You're so unhip.
You're both wrong
A CB antenna actually belongs in the center of the roof (assuming you have a metallic roof).
Standard CB antennas (like a Firestik) require a metallic ground plane to reflect the transmission energy up and away. The larger and flatter, the better.
Bumper mounts are problematic in two ways. One is the unbalanced (and much smaller) ground plane that comes with this location, and the other is interference from reflections of the transmission energy off of vertical surfaces around the top two thirds or so of the antenna (like the back of a Jeep). This feeds energy back into the antenna, which is bad. Both of these problems lead to high SWR and can damage your radio when transmitting.
All that said, bumper mounts work for short range communication, but you need to throw an SWR meter on there and tune it in. CB antennas always need to be tuned, but especially when mounted in compromising positions like bumpers. The front bumper is less bad than the back bumper since the antenna at least isn't right up against vertical surfaces like it is on the back.
Don't fry your rig
That's what fuses are for.
I will downgrade my 4 footer to a 2 footer. Placed very similar to the picture below. I need about a half mile tops. Folks get about 2 miles out of a rig like this: