Question about Cobra 29 LTD CB Radio
3.0 is way too high for the SWR reading. Check your coax and length. I always preferred 3-foot increments, such as 12, 15 , 18 feet, etc. 18' is good because that's a half-wavelength for the middle of the Citizen's Band frequencies. Check grounding at the antenna mount. Also, I have run across "floating grounds" between the truck body and frame...not too often though. That will cause a high standing wave ratio. If you're using a fibreglass antenna, make certain wire has not been cut, or broken from the tip of the rod. If so, that can make an antenna/radio very difficult to tune properly. Try another antenna on the mount if necessary. I hope you find this problem, because it's not good for the transmitter to be subjected to a high amount of reflected RF power coming back to the radio, for very long. Good luck.
Posted on Sep 01, 2010
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Posted on Jan 02, 2017
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Check your ground wire and by your post I gather that you are user some form of headphone device, I say this because normally the speaker is off when the microphone is keyed. I would also check the controls on the headset if you are using one.
I hope this helps,
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