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Cb interference with am/fm


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Just installed a Uniden bearcat cmx560 (an all in the handset unit) ran that through ~9ft of coax to my ...

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Old 05-17-2018, 08:12 PM   #1 (permalink)
 
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Default Cb interference with am/fm

Just installed a Uniden bearcat cmx560 (an all in the handset unit) ran that through ~9ft of coax to my firestik moutn and to my ~4ft firestik classic antenna.

hooked up the SWR meter first (of course) and followed its instructions. SWR reading is just above 1. great (seems a bit too good to be true, but whatever)

i have set up several CBs in several rigs the same way without issue.

here is the issue(s) in this setup

when i key the mic (to transmit) the AM/FM radio gets quieter, the volume. the two units are not tied together, other than chassis ground...any ideas?

i have not tried to receive a known signal, but all channels i was receiving static unless i changed the squelch to level 2 or 3 (this unit only has 1, 2, or 3 for the squelch, which is frustrating)

bad radio ground? bad antenna ground?

ideas?

tonight i will try sending from one of my rigs to another and see what happens.
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Old 05-17-2018, 09:09 PM   #2 (permalink)
 
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Where are you getting power for the CB? I might try temporarily tapping in somewhere else and see if it makes a difference.
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Old 05-17-2018, 10:38 PM   #3 (permalink)
 
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Well I think I found it. Started probing my antenna wires and they have continuity between the two...thats not right....soy or check my,mounting and its good. Just like all my other rigs. Unhook the radio and probe the connector for the cable there. No continuity...ok...wierd. Probe the radio and the antenna connection is a complete circuit. Must be something wrong internally on the radio
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Old 05-17-2018, 10:55 PM   #4 (permalink)
 
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That stinks.
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Old 05-18-2018, 12:32 AM   #5 (permalink)
 
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Yup. Seems pretty obvious. I don't think there is any way/reason the coax output k,,the radio would have both sides of it connected and a complete circuit. Brand new radio...
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02 KJ Limited, 255 70 16 General AT2, Ironman Lift, JCR sliders, Mopar skids, radiator skid, LS/4.10 gearing, factory front hooks and rear hitch

92 XJ 4.0 HO,AW4, NP242, 31s, 1.75 spacer and ZJ V8 coils, double cherokee leaf pack and 2 inch rough country shackles, 2.5 inch dnynomax exhaust, magnaflow cat, front hooks & rear hitch, gas tank skid, front skid, warn t-case skid, 99+ intake, bored TB
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