We found this circuit in the April 1982 Radio Electronics magazine. It contains a good power stage whose transistor must be mounted on a good heat sink.
We found this signal generator circuit in the November 1978 issue of Radio Electronics magazine. The...
This simple audio and RF signal tracker was found in a Japanese publication in 1967. The...
This wired intercom circuit was found in a March 1965 Radio Electronics. The circuit uses two...