This makes me wonder about how a cheap DSP dongle available for digital TV today could be useful for aligning PF1RX.
It would spot the Local oscillator and could be used for tweaking up the correct harmonic. It could be loosely coupled to the mixer and used to align front end too.
If you did the HF Input modification it could connect to the 10.7MHz IF pre xtal filter and make a band scope/multimode RX (defeat the economiser for that). But then the dongle might make a better UHF RX anyway.
Lastly - try 100kHz IF from PF1 direct into a PC sound card?
<I must not> <I must not>
