HF Transmitter #15 - RF Preamp Trial Number 3

Looks like the third time was a charm for me fixing my RF preamp problems! In this episode, I build and test my third version of an RF preamp for this HF transmitter project. Switching to a class AB instead of class A for the final stage made a big difference in heat dissipation, with some trade-offs in harmonics. No endorsement is made nor implied to any commercial products referenced in this episode.