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 monitors the current in the negative line. The circuit is from a 2005 Linear...
This circuit, from the 1990 Motorola Dataar Databook, can be implemented with other comparators. The...
This old AM receiver with an integrated circuit came out in a documentation from the 80s. The...