Found in a 90s Linear Technology document, this circuit uses components from that time. The transistor must have a good heat sink.
This power supply can supply voltages from 3 to 9 V and is very useful on the bench. The maximum...
The microphone for this circuit, found in a 1967 Japanese documentation, must be ceramic or...
This transistorized circuit with germanium transistors was found in a publication from the 1960s....