We found this circuit in a magazine 73 for radio amateurs from the 80's. The circuit makes use of an epochal component which is programmed according to the table beside the diagram.
This instrument was found in a publication for radio amateurs in 1973. The tuned circuit consists of...
This circuit was found in an American documentation. Its purpose is to allow the use of a digital...
The sensor used in this transistor is a common silicon transistor and the operational admits...