This circuit is from a 1980s Motorola documentation. The circuit can be set to fire from 60 to 120 V DC or from 42 to 84 V AC. The circuit has a forehead button that activates an indicator lamp.
Found in a 1982 Maplin magazine, this circuit can be changed to work on other frequencies. The response...
The values of the components of this Mullard (Philips) circuit depend on the desired voltages. The...
We find this circuit in an American documentation from the 80's. The circuit has the coil given by the...