This circuit is from an American documentation from 1975. The circuit uses components of the time which can be replaced by modern equivalents. The coupler is homemade with a lamp and a photocell.
This circuit, found in ancient US documentation, allows you to switch the antenna from the...
This circuit came out in an American magazine that no longer exists. It's the Electronic...
This circuit can use any operational of the MC34071 family. It was suggested by Motorola's Linear...