This old 1 W audio amplifier transistor circuit is from a 1967 Japanese magazine. The transistors are germanium of the time and the type transformers found in similar equipment of the time.
This amplifier was taken from documentation from the 1960s. Transistors are germanium types from...
This configuration elaborated with common junction FETs has a characteristic like that of tunnel...
This unusual amplifier configuration is from 1986. The circuit has a high resting current given the...