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.
This circuit is from a documentation for amateurs from 1978. The circuit both analyzes logical...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This is one of the many versions of this type of indicator that the reader can find on our...