This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The circuit can serve as a reference for projects with modern equivalent components.
We found this 3-transistor receiver in the July 1970 issue of Radio Electronics. The transistors may be...
This circuit was found in a 2001 documentation. It is a test of zener diodes that uses a voltmeter or...
This is the receiver from the previous alarm system. The circuit is from Radio Electronics, April...