This 1967 commercial radio covers 6 wave bands selected by appropriate coils. The circuit currently uses critical components, such as coils and transformers.
This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of...
National Semiconductor suggests the circuit in the figure that uses two operational amplifiers of type...
This ionization chamber voltage tripler circuit from the January 1994 Electronics Now magazine uses...