Found in old documentation, this circuit makes use of amplifiers of the time, uncommon today. Next to the diagram, the formula for calculating the components.
This 1967 commercial radio covers 6 wave bands selected by appropriate coils. The circuit...
This receiver was found in a Japanese publication in 1967. The circuit uses germanium transistors and...
This circuit was found in an Analog Devices manual and can supply a 3 mA current or drain a 10 mA...