1 kHz oscillator (CB21934E)

This circuit was taken from the 1960's Mullard Transistor Manual. Information about the coils is given along with the diagram.

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Power monitor (CB7263E)
This circuit causes an LED to flash if the monitored voltage exceeds the value set in the pot. The...
True RMS Voltmeter (CB25353E)
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
3 to10 MHz Oscillator (CB13020E)
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...