This circuit is from a 1965 Electronic Design. The transistors may be general purpose and the power supply must be symmetrical.
Suggested by Radio Electronics from the 90s, this circuit is suitable for NiCAd batteries with a...
Found in a 1966 publication, this circuit is a simple version of a field strength meter. The diode...
We find this circuit in a 1980s documentation for amateur radio. The circuit shows how to switch...