This circuit interrupts the power supply when grounding is missing. The circuit is from an old documentation (from the 80's) using current transformers and other components of the time.
Indicated for adjustment in transmitters for the 11-meter band, this circuit with analog meter was...
The circuit in the figure causes two lamps to flash alternately at a frequency that can be...
We find this circuit in an American documentation from the 80's. The circuit has the coil given by the...