Today this frequency corresponds to the end of the FM band. However, in December 1958, when the circuit was published in Radio Electronics magazine it was the frequency used by American satellites.
This circuit appears several times in this section and on this site, obtained from different...
This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be...
The circuit shown consists of a NO and NC sensor system for alarms. The output must be connected to a...