This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
This circuit using a SIDAC as a relaxation oscillator was found in the ON Semiconductor manual for...
We found this circuit in a 1974 documentation. Upon receiving an audio signal, it activates a...
This circuit was obtained from an American publication of 1982, but can be assembled with ease...