This circuit was found in a 1965 General Electric documentation. It is intended for reception of the aviation strip, but inside an aircraft or nearby (which is now prohibited).
We found this circuit for old tape recorders in the December 1972 Radio Electronics magazine. The...
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the...