This audio configuration of televisions from the 1960s was found in a Mullard transistor reference manual. Transformers are the critical components.
The circuit presented was found in the 1994 Linear Applications Handbook from National...
This circuit, which in our times would be called a shield, can also be used with other loads. The...
This circuit is intended for amplification of signals in the range of 1.8 to 20 MHz. The...