Then, most transistors that would do high voltages had terrible Hfe – so the common emitter input id the current gain and biased the HV-but-otherwise-crappy output transistor. And yes, of course ...

Just as the common emitter amplifier and common base amplifier each tied those respective transistor terminals to a fixed potential and used the other two terminals as amplifier input and output ...

Immediately, I learned that the common base configuration gain was 6db lower than the common emitter. This blew my mind. Then I started checking input resistance and was shocked at how low it measured ...

One interesting observation is that input and output resistances are reasonably closely matched—something I never realized before — this makes cascading of stages more effective. Protoboard. For the ...