Found in American documentation from the 1990s, this circuit uses coils with multiple outlets to get the best reception, the diode is a general-purpose crystal diode.
If you are on an old PC that you use for experiments, control or other applications, this circuit is...
We found this circuit in an American publication from 1977. The circuit drives two LEDs according to...
In this circuit, the integrated amplifier used is uncommon today. The circuit is from an American...