This circuit was published in a 90s Radio Electronics. The circuit uses the well-known LM386 that appears in a large number of projects on this site.
This frequency triple oscillator circuit was found in an American publication in 1967. The FET is...
This circuit of 1965 documentation makes use of a tunnel diode to retard a pulse without...
This is the power step of the previous circuit. Output transistors must be mounted on good heat...