Based on the MC1488 or MC1489 operational amplifiers, this circuit has a 5000V isolation driving a 2N3055 transistor for a high-power signal. The receiver is a common phototransistor.
This simple oscillator with just one transistor has a frequency determined by the characteristics of the...
We found this circuit in the January 1979 issue of Radio Electronics magazine. Components are...
Found in a 90’s Radio Electronics magazine, this circuit uses a component from the time, difficult...