)
This variable frequency oscillator was found in an old American documentation. Transistors allow more modern equivalents and coil data are found next to the diagram for several frequency bands.
This circuit appeared in a Radio Electronics magazine in March 1962. The circuit uses two...
A complete test for opto-couplers can be made using the circuit Bellow. The function generator...
The integrated circuits of the SGS L79xx series are equivalent to those of the common 79xx series,...