This circuit with germanium transistors is from 1960 and was found in Mullard's transistor application manual from 1960. The circuit can be adapted to use more modern transistors.
Suggested by a 1965 Electronic Design, this circuit has a gain of 15 dB at 45 MHz and can be...
This circuit is from an old American publication from 1977. Transistor Q1 can be a TIP42 and Q2 a...
This circuit consists of a traditional version of dimmer with triac and was found in a 2000...