No information is given on the transformer in this circuit that we found in an American 1967 documentation. The power transistors are of the time and mounted on a plug-in module.
A passive mixer with few components is that of the circuit shown, found in a 1982 documentation. As readers...
This circuit is found in the Italian magazine Radio Elettronica, August 1975 issue. There is a...
This is the complete circuit of a binary counter for educational purposes. Found in the February 1973...