This circuit is from an American publication of the 80's. It makes use of components of the time. However, the circuit is the basis for a modern shield application since the input is TTL.
This circuit can be used to detect the signals from the previous circuit or from any radio...
Found in Popular Electronics from the 90's, this circuit makes use of components from the time. |...
This receiver for frequencies up to 18 MHz was found in American documentation from the 1990s. Data...