Jerry,
For the stock uBITX Ashhar Farhan published a video on how to calibrate and set the BFO:
The only uBITX that I know of that does not use zero beating as the calibration process is the stock v5.? For that version, they went to the transmission of a 10MHz carrier that you were to monitor with either a counter or another radio.
73
Evan
AC9TU
