This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.
This fish flame circuit was found in a 1971 magazine. The circuit can still be mounted with BC558...
This circuit was found in an American 80s circuit manual. The components used are unusual. The...
General purpose, up to 8 A SCRs can be tested with this simple circuit. In special the circuit is...