The best way that I have found to adjust the BFO is to use a free PC based audio spectrum analyzer.? Connect a mic to the audio in on the computer, tune the uBitx to a clear frequency with white noise, and then adjust the BFO to center the signal plot between 500 and 3000 hertz.? This gives the maximum signal and best sounding audio.
Here is the link to the free software:
Note: after adjusting the BFO you may need to go back and recalibrate the dial.? When I did the BFO adjustment on my new v5 board, I had to go back and adjust the calibration for the dial frequency setting.
Above worked for me, YMMV
73
Evan
AC9TU
