Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern equivalent components. The SCR and the diodes must be according to the load current.
This circuit uses components of the time. We found it in a 1968 US documentation. The delay is 100 ns...
This circuit compresses the dynamic range (amplitudes) of an audio signal. The circuit is passive and...
This circuit is from an Argentine publication from 1973. It provides a signal to an amplifier from...