On 8 Feb 2021, at 18:14, Jim Allyn - N7JA <jim@...
Well there, now we have a list of the difficulties in building a 2 meter QCX. All that remains is to tackle and overcome those difficulties.
I don't think building 2 meter gear is terribly difficult, lots of hams have done it. Heath made several VHF/UHF kits, probably the best known of which was the HW-2036/2036A. I have designed and built receivers operating up to 929 MHz; it does start getting difficult there.