This circuit was found in Ferranti's 1967 documentation. The circuit drives a 40 V relay, but it can be adapted to operate with sensitive lower voltage relays.
Found in 1966 General Electric documentation, this circuit uses solicon unilateral switches (SUS)...
This is an experimental crystal radio that uses no power source. The antenna must be very long (at...
The purpose of this circuit is to let the signals of the frequency range corresponding to the...