cb grounding . . . it's electronics - Ford Powerstroke Diesel Forum
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post #1 of 55 Old 07-08-2009, 07:02 PM Thread Starter
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cb grounding . . . it's electronics

so i can't remember where the cb threads should go.

anyway, i've had my cb goin since about march i guess. last week or two ago, my SWR's shot WAY up. we're talking from about 2 to 3.5
the only thing i can think of is it got hot.
i thought maybe my ground went bad, so i moved it from a bolt holding the mirror mount on to the point where the little nylon washer is so that the ground is only touching the coupler between the antenna and the adapter where the coax screws on. still didn't fix it.
my question is, where do you ground on the mount area and where do you ground to on the truck side? a grounding screw on the body or way down on the frame itself?
and do you ground the cb too?



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post #2 of 55 Old 07-08-2009, 07:08 PM
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I ran mine from a mounting bolt on the antenna base to the trucks frame rail!

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post #3 of 55 Old 07-08-2009, 07:25 PM
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Try running a wire from the mounting bolt of the mount directly to the battery for a temporary test to see if that is what your problem is. I suspect it is not and that your coax took a dump. How much power are you pushing through it? JJ

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post #4 of 55 Old 07-09-2009, 07:00 AM Thread Starter
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it came with the normal 4 watts but i got it peaked up to 15.



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post #5 of 55 Old 07-11-2009, 02:58 PM Thread Starter
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ok ran a wire straight from the negative on the battery to the mount and would touch and then remove the wire from the mount while watching the SWRs. VERY little drop in SWRs. like a needle or less width.
so how do i test my coax other than putting new stuff on? and will 15 watts really kill it?



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post #6 of 55 Old 07-11-2009, 03:03 PM
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post #7 of 55 Old 07-11-2009, 03:47 PM Thread Starter
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in my research, firestick has really good reference pages on their site. Measuring SWR
found this about 15 minutes ago. so i tested continuity with no coax plugged in and i'm fine. plugged it in, no bueno. so i think my coax and the shielding musta melted together somewhere. gonna have replace it.
anyone have any ideas of where to run coax to keep it from happening again? and i have a co phased system



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post #8 of 55 Old 07-11-2009, 03:56 PM
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i ran mine along the frame on the other side of the exhaust and zip tied it.

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post #9 of 55 Old 07-12-2009, 08:12 AM Thread Starter
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where is your antenna at?
mine are both on the mirrors



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post #10 of 55 Old 07-12-2009, 08:26 AM
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Mirror mounts are really tough on coax because it has to flex when the door is opened and closed. You'll get longer life if you've got a droop in the cable where it goes through the door. That spreads the flex over a longer length of cable. The trick is to keep the extra cable from getting pinched somewhere when the door is closed.

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