We found this circuit in an 80's manual. The same configuration can be adapted to make use of modern operational amplifiers. The power supply is symmetrical.
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...