[arm-allstar] Obnoxious tone

[Scott Zimmerman]

Chris, You mention that you are using a J-pole. J-poles are noted for RF on the shield of the coax. I'm betting this is part of your issue. What happens if you put a dummy load on the radio for a test? Scott Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Chris Smart via ARM-allstar <arm-allstar at hamvoip.org> Date: 6/19/21  3:55 PM  (GMT-06:00) To: Bryan Johnson via ARM-allstar <arm-allstar at hamvoip.org> Cc: Chris Smart <ve3rwj at winsystem.org> Subject: Re: [arm-allstar] Obnoxious tone What power level do you have the Alinco set at and what are you using for an antenna?My DR-435T MKIII is set to 5 watts, and I"m using a monoband wire j-poll from N9TAX. It's taped to the wall about six feet away from the Alinco.On 2021-06-19 4:48 p.m., "Bryan Johnson via ARM-allstar" wrote:> 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>> _______________________________________________>> ARM-allstar mailing list> ARM-allstar at hamvoip.org> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar>> Visit the BBB and RPi2/3/4 web page - http://hamvoip.org_______________________________________________ARM-allstar mailing listARM-allstar at hamvoip.orghttp://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstarVisit the BBB and RPi2/3/4 web page - http://hamvoip.org