This circuit is from a Hughes documentation from 1968. The components are of the time and the RC network determines the operating frequency of the circuit.
The frequency of this traditional crystal oscillator (XTAL) depends only on the used crystal,...
This circuit was found in a 73 amateur radio magazine from the 90s. An LED extends the scale from 0...
The inverter circuit shown in the figure provides a voltage of around 110 V with a rectangular waveform...