In the figure we have 3 oscillators with logic gates that can be triggered by external logic signals. The circuits were found in the Radio Electronics magazine of April 1987.
Found in a 1967 Electronics World, this circuit can use any modern equivalent FET. Observe the...
Found on 80's Popular Electronics this circuit operates at 455 kHz. The explorer coil is formed by...
Details of the coil of this two-transistor generative receiver were not given. We found it in a...