This class B circuit was found in the 1960 Mullard transistor reference manual. Transformers are the critical components. The source is not symmetric.
Found in a 1964 CQ magazine this circuit consists of an automatic telegraphic key, providing the...
This is the minimum amplifier configuration with the LM380 and can provide an output of up to 2.5...
The UM3562 integrated circuit (not very easy to find) synthesizes three types of sound that...