Whip antenna for cb
#21
JK Freak
Thread Starter
Thanks for the response and the pics. I will probably do just what u did also. Question, can the antenna be plastidipped safely? Would it sacrifice function?
#22
JK Enthusiast
Here are a few closeup photos, I installed the AEV corner guards and the antenna is now mounted on it. Also, just as important is the antenna mount. I have this one, and it is the absolute best mount you can buy. https://breedlovemounts.com/CB_antenna_ballmount.html I also used the Breedlove Puck baseplate so no bolts are showing on the outside.
https://breedlovemounts.com/images/f...4e951a3c09.gif
#25
JK Enthusiast
Join Date: Sep 2011
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Yes, if you insulate your antenna (ie. plasti-dip) the SWR will change. How much, I can't say. This is why those fiberglass model instructions tell you to put the cap on each time when checking the SWR, during tuning.
#26
JK Newbie
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Phil
Last edited by psouza; 06-26-2014 at 04:23 PM.
#27
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The resonance of the typical tunable fiberglass whip (Firestick) will drop in frequency by approximately 200 KHz if coated by a dense layer of polymer plastic. Almost nothing is "transparent" to RF and when placed in proximity to the close windings on the antenna shaft (there are two of these on the four foot Firestick). The material adds capacity to the circuit, reducing the resonance and increases dielectric losses (reduces the "Q") thus reducing efficiency. Antennas without these concentrated windings will not be affected as much.
Phil
Phil