"David Looser" wrote in
message
"Jim Lesurf" wrote

That said, I did have one of my summer project students
once develop a single-ended transistor amp that used an
output transformer, just to play with. So 'SET' I guess,
if T = Transistor. ;-

As used in car radios at one time. Hybid and early
all-transistor car radios mostly seemed to use a Class-A
single-ended power transistor (OC16 or similar) output
stage rather than a Class-B push-pull pair. I guess it
was cheaper and the much higher power consumption of
Class-A didn't matter much in a car.

Probably driven by the then-current high price of power transistors.

If memory serves, there was a period of time where most of the car radio was
built from tubes that used +12 volts for the B+, and a single power
transistor in the output stage. This eliminated the need for a vibrator and
power transformer to create more typical B+ voltages.