This receiver for frequencies up to 18 MHz was found in American documentation from the 1990s. Data for coil winding is aggregated.
This circuit was found in documentation from the 90s. Its purpose is to dial a programmed number...
I found this circuit in a magazine Mundo Eletrônico, from the 70s published by my friend A....
This circuit generates a signal rich in harmonics that extends up to close to 1 GHz, serving for...