Found in ancient documentation, this circuit uses a high voltage transistor of the time. Observe the supply voltage of the neon lamp used.
This circuit, found in a 1999 documentation, prevents the speaker from being connected as soon as the...
This output stage with the 2N626 and 2N1019 in counterphase was found in a Radio Electronics...
This circuit for heating elements was taken from a 1966 General Electric manual. The SCRs are...