This 1967 commercial radio covers 6 wave bands selected by appropriate coils. The circuit currently uses critical components, such as coils and transformers.
This circuit was found in an old GE manual. It uses a thermocouple as a sensor. The SCR must be in...
This circuit was found in the February 1997 Electronics Now magazine. The circuit has a power...
We found this circuit in an old American operational Amp. documentation. The circuit applies to...