Found in an old English publication, this circuit applies to the 240 V network, but can be changed to lower voltages. Transistors are mostly general-purpose, admitting modern equivalents.
This traditional amplifier configuration is from the National Semiconductor's Linear Applications Handbook...
We found this circuit in a Radio Electronics from February 1966. The circuit uses a germanium...
This circuit originally appeared in a publication of 1997. With the changes, the circuit can be...