I built a class ab amplifier kit to use with my qrp radio. 2 watts in creates 50+ out.
This was the pa 70 amplifier kit.
It is a kit with no instructions, but a whole suite of internet videos and articles.
I built mine using an MRF 9120 transistor. There was a comment on a thread somewhere that said use 4 turns on the output transformer instead of three when using the 9120 chip. That will help yield full power.
How can I test which is indeed best? I would think more turns changes the output impedance, but by how much. I am wondering how to best analyze the setup I have.