Re: Cb troubles!!
Hello Leader. I don't have time to walk you through the troubleshooting of your CB at this time. Today has turned into a $hit$torm.
I know more about radio than most of the folks responding. Sorry guys, but most of your advice and technical info is wrong. Not flaming anyone here, but you are wrong, and conveying it to someone who doesn't need wrong info.
You don't see 50 ohms with an ohmmeter. It is 50 ohms at frequency only. Ohmmeters test at DC. You will more likely see short or open at DC, depending on the antenna.
The length of coax doesn't matter. Period.
Yes, metal structures in the area will affect SWR, but not much. Cutting the antenna to a specific channel will affect SWR, but not much. You have described a serious problem. A little SWR problem would not cause the problems you described, and is not your problem. Something like infinite SWR would be a problem.
Look for damaged coax, bad grounds, bad connectors, or something bad with the unit. Check for good power to unit, both plus and ground.
Forget the length of coax, ohmmeters, and exact length and tuning of the antenna, and worrying about nearby metal structures. Those are things in the wrong direction.
Good luck, and I'll try to help more later.
"Pleased to meet you, hope you guess my name."