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CB RF antenna damage

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nd5y

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Is it normal for a radio antenna jack to show a DC short like that?
It depends on the particular radio model.
You would need to look at the schematic and see if the circuits between the antenna connector and PA, filters, or T/R switch have any inductors to ground.
If it has them then it's normal to read a short with a multimeter.
 

cmdrwill

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Well, this is interesting. I have continuity between the center pole of the radio's rear coax connector and the ground (outer barrel). That shouldn't happen.

Is it normal for a radio antenna jack to show a DC short like that?

Most radio receivers have a static discharge circuit in the antenna input. So that is what the "continuity" or "short" is.
These parts can be a resistor, RF coil, to bleed off static charges.
 

Josh380

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Well, turns out the mount and coax checked out ok. It just happens that the one (and only) repeater I was basing my results off of is out of service. Tried another LA based repeater and voila! Works just fine.

Wow. Sometimes I dunno......
 

mmckenna

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Well, turns out the mount and coax checked out ok. It just happens that the one (and only) repeater I was basing my results off of is out of service. Tried another LA based repeater and voila! Works just fine.

Wow. Sometimes I dunno......

It happens to all of us. Sometimes troubleshooting this sort of stuff is sort of like chasing your tail around in circles.

Welcome to the club. Your membership card will be sent to you shortly.
 

K6EEN

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Well, turns out the mount and coax checked out ok. It just happens that the one (and only) repeater I was basing my results off of is out of service. Tried another LA based repeater and voila! Works just fine.
I keep one of those 22 channel blister pack FRS/GMRS walkie talkies handy when debugging the UHF mobile rig (debugging on simplex before trying repeaters).
 

Josh380

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I keep one of those 22 channel blister pack FRS/GMRS walkie talkies handy when debugging the UHF mobile rig (debugging on simplex before trying repeaters).
I do have one..unfortunately the gm300 doesn't have a simplex button..simplex frequencies have to be programmed to their own channel..and I don't have that particular repeater setup for simplex.
 
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