Re: ubitx circuit, wiring, source code on github
Source on github at https://github.com/afarhan/ubitx
appears to agree with this Dec 6 post from Farhan https://groups.io/g/BITX20/message/35241
regarding how to calibrate the Si5351 on the uBitx.
But the write up at http://www.hfsignals.com/index.php/ubitx-tuneup/
appears to agree with this post: https://groups.io/g/BITX20/message/35235
My guess is that Farhan's github repository is out of date
and does not agree with what is getting shipped.