Just got an Anytone AT-6666

Well, the issue isn't the noise in the speaker, it's trying to reduce the amount of RF interference getting into the receiver. Computer hash. The interference usually finds its way in via the unshielded or unprotected power line, mic cables etc. Plus there's no real RF shielding on the radio itself other than the metal casing. I'm trying to figure out how to clean the receive up, not just the speaker hash. I'm not sure how to do this other than ferrite beads on everything and bonding or ground strapping the antenna mount.. Can't touch the computers or inverter themselves, company truck.

 

I think you missed my point. If I have s8 of computer or RF noise, the DSP speaker won't be able to clean up the audio from an s2 or s3 signal buried under s8 interference. The s8 signal buries the s3 so the speaker can't hear it, therefore the dsp in the speaker can't process it. It can't process what it can't hear

 

I'm just installing a 4ft Top load fiberglass Firestik II. Lowest I can get at this time is:

26.965 2.0
27.205 1.5
27.405 1.0.
27.505 is 1.1
27.805 is 1.5

Set screw is full extend. Can't go out any further.

Next is installing a ground strap on my door hinge to see if that helps bring it down. I hope 1 will work as that's all I got for now

 

Ok that's something I didn't know. Any particular brand to suggest?