Hi everyone, I am experiencing something odd, when tuning around on dummy load or no antenna/dummy load attached i hear a high pitched squeal that goes up in frequency as you tune a couple khz up (like to 14.079) then drops off.
If you set ATT to anything even like 8.. it goes away.
I am on a ubitx 4, with the KD8CEC Firmware and nextion display, unplugging display completely does not fix it, touching the crystals on the raduino or on the board dont change anything.. pulling out the antenna from board does not remove it.
it seems this is a birdie, could it be a bad arduino?
It is semi noticable on a tuned antenna but very very very faint under the noise.. This only happens on the 20m FT8 frequency and then somewhere in the high 5 mhz range (dont care about the 5mhz).
Sound clip -- lots of static cause its faint into my PC recording, may need to turn it up, and it will get louder partially in.
thanks for the help, everything else works great on this, other than the steady constant tone/"beep"
Chris
N7CCX
