Harmonic generator (CB8989E)

This circuit generates a 1296 MHz signal from 100 or 1,000 kHz crystals. We found it in an American documentation for radio amateurs.

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LM390 1W Amplifier (CB25306E)
This small audio amplifier is based on the LM390 with a minimum of external components. We found it...
12 W Amplifier with Bass Boost TDA 1910 (CB15231E)
The integrated circuit used is not common today. The circuit presents a bass boost according to...
Phase Inverter (CB7500E)
This circuit provides two outputs of the same signal. One with the original phase and the other...