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For the CB Guru's

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CarolinaClodhopper

Was Trucker_Tom
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Feb 13, 2013
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504
My old truck had 75 ohm coax run for dual antennas from the factory. I myself always just run a single Wilson 2000 trucker antenna. Now here's what got me, the guy said it would be okay to run the 75 ohm dual coax for just the single antenna, and to just leave the other mount empty... What is your all's opinions or experiences with this?

I myself did away with the 75ohm coax, and rerouted just a single 18ft. run of 50ohm coax to the drivers side. My SWR's are much more favorable and to my liking....

Was the guy at the CB shop right or wrong?
 

davenlr

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637
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North Little Rock, Ar
Wrong. 75 ohm coax is used to correct a phasing mismatch. For a single antenna, with the lowest SWR, you need coax to match the antenna. While the 75 ohm coax would have worked, your performance would not have been 100%
 

CarolinaClodhopper

Was Trucker_Tom
Joined
Feb 13, 2013
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504
Yeah that's what got me, was when he told me the unterminated side wouldn't matter.. That struck me as odd, and I got the impression he was blowing smoke up my bum.....
 

KC8ESL

Member
Joined
Mar 8, 2008
Messages
535
Location
Painesville, Ohio
The only thing blowing smoke will be your PA on your CB.

50 ohm vs 75 ohm coax will raise your VSWR only slightly. If it is 1.5:1, with 75 ohm cable it will be 1.6:1. Yawn.

Smart move running the 50 ohm line to the single antenna, our trucks @ work give me an absolute fight til the end with the phased lines.
 
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