One thing that is important is frequency stability - I did not want to even try to build a stable, easy to tune VFO (variable frequency oscillator) so I bought a 50 year old Heathkit VFO, bypassed some noisy switch contacts (that switch things I do not need to switch) and it works just fine. I had one of these when I was 14. This will serve as the "tuner" for the transmitter.





VFO Internals, that reduction drive is IMPOSSIBLE to find today - like looking for a genuine, working cupholder.