Pulse sampling (CB8881E)

This circuit was found in a 1966 EEE. Transistors support modern equivalents and the waveforms are given next to the diagram.

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Hartley Oscillator (CB19577E)
The frequency of this oscillator depends on T, which for the audio band can be a common output...
3-Range FET Voltmeter (CB25570E)
This circuit can work with almost any JFET. The circuit is from an Electronics Now from April...
Simple VCO (CB8745E)
This voltage-controlled oscillator uses components that are still common in our market. The...