We found this circuit in the Motorola manual of the component itself. The transistor can be the TIP31 mounted on a good value heatsink.
This circuit, found in a Popular Electronics from 1992, is based on an oscillator and a crystal...
Found in old American documentation, this filter has a 8 dB per octave attenuation. The formulas for...
You can adjust the frequency produced by a ring oscillator with three inverters inserting a...