But back in the early
70's, table radios made the transision from the "All American 5ive" tube
circuit to a solid state circuit that used a high voltage bipolar
transistor and output transformer for the audio output.


I'm not sure exactly when this transition was made, but I do know that
it occurred sometime well before the "early 70's", I would say that the
transition occurred in the mid 60's, I know from personal experience
that these radios were already in production by late 66, when they first
went into production I don't know.


I was thinking of the SS radios that were "hot chassis". The audio
output transistor had about 100V B+ on it. Before these, there were
some SS radios that had small power transformers and were essentially
portable circuits inserted inside a table radio cabinet. But it's the
hot chassis high voltage transistors that ran in class A "single ended"
I was thinking of.




I thought the common bipolar transistor was a "triode".



My Chinese friends tell me that the word "transistor" translates into
"crystal triode" in Chinese. :-)