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Cutting your FM/AM radio antenna will cause the sensitivity to decrease. Cutting the CB antenna may destroy the transmitter due to an SWR mismatch - there are alternatives to simply cutting the antennas - there are "rubber ducky" antennas which will give satisfactory performance. Check HERE .
I cut my AM/FM antenna to go under my garage door and it didn't affect the reception. Maybe it would in the real fringe areas, but I didn't see it. That antenna is a compromise anyway, itis electrically impossible to be correct for the entire AM and/or FM band anyway.The slight mismatch you will introduce by trimming it a few inches won't be noticable.
The CB antenna is totally different, it must be correct to perform and to protect the transmitter.
I later added the J&M antennas to both sides and am happy with them.
My brother rides a 06 ultra. He shortened both the radio and the CB antennas by 16". I ride along with him on some long rides and he sends and receives well on his CB. His radio doesn't seem to be affected either.
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Regardless of what some might say, you WILL affect reception - to what degree depends on the area yer in. Folks that don't git into the boonies will never notice - but we git into areas whar you kin set the radio ta scan an' git NO reception fer hours, so take it with a grain of salt.
An' if ya trim the CB antenna improperly (ie, don't set the SWR's properly), you stand a REAL risk of burnin' out the finals. Period.
ORIGINAL: Jim Dawson
The CB antenna is totally different, it must be correct to perform and to protect the transmitter. I later added the J&M antennas to both sides and am happy with them.
Another vote for the J&M shorty antennas. If you cut your attenna you will reduce radio reception capability. If you cut the CB antenna you will get a high swr when you transmit and burn out the finals of your radio.
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