[arm-allstar] Obnoxious tone

[Bryan Johnson]

I have a server with the latest hamvoip version (pre-release from a 
couple weeks ago) installed. I'm using simpleusb and a RIM-Alinco tied 
to a newer DR-135. I get a very obnoxious whine (around a 1000khz or so) 
on received audio (audio coming from the allstar server, that is) from 
the Alinco. I've got ferrite beads on the power wires (Alinco and usb 
cable feeding the pi), ethernet cable and usb cable from the pi to the 
RIM-Alinco. I tried another power supply for the pi (3b+). I even tried 
a 12 volt to usb converter (off the same 12 vdc supply powering the 
Alinco) to power the pi. Tried disconnecting the ethernet cable to 
eliminate suspects. Still can't figure out where the whine is coming 
from, but I suspect the RIM-Alinco. Anyone else run across this issue? 
And suggestions to get rid of the whine? Wondering if I could use a 
straight thru DB9 cable to move the RIM-Alinco away from the back of the 
DR-135 to see if that helps (assuming some sort of RF feedback from the 
Alinco). It has me stumped.

Thanks,

Bryan - K6RBJ