Cobra 29LTD Classic questions.

I've got a 29ltd I've had for a couple years bone stock radio factory mic etc etc.

I put it in my new truck and set it up according to the manual and all was well. Now it seems when I turn squelch down it has a strange sound instead of just static and I'm not sure why. RF gain is set to half and when in CAL mode its setting right in the arrow and SWR shows right about the W in the meter on the radio. Basically the same as it was before the strange noise. The nb/anl switch is in the top position.

Also the red ANT light comes on when I key up. It's done that since I got the radio. Any suggestions?

I'll link a video of the noise once it finishes uploading.

 

Here's the noise.

 

There wasn't an inverter in the truck when I got it. There is one now. I'll turn it off and see if it makes a difference.

Its not the factory antenna or coax. Its mounted to a grab handle on the back of the cab between a headache rack with maybe 2 feet above the cab probably 5 feet overall. It's one of those with the coil around it about halfway up and then drops to what looks like a stereo antenna. It was already on the truck when I got it.

 

Ok inverter off took care of the noise. How do I get rid of said noise? Better coax?

It's this style antenna.

 

It also seems that I cant recieve very far. Was talking to a feller the other night and if I got a half mile from him it was really poor quality.

Trucks an 18 579 without the factory CB package so no power hookups or any of that. It was tied into power and ground for some other stuff behind the overhead. I'm guessing likely where the power would have come from originally but wouldn't know

 

Alright. Could the noise be coming from the coax running next to the power and ground going to the inverter and with it being off there's no power moving through those cables? I genuinely don't know is why I ask, not doubting what your saying about the filter in the power to the radio. Just want to fix it the right way instead of throwing stuff at it.

Also I've got an older fire stick at home I may swap these with and mount it up higher.