This circuit was found in a Motorola manual from 1968. As it can be obtained 20 V at 15 kHz from 120 V x 60 Hz. The components are of the time.
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...
We found this circuit in the National Semiconductor's Linear Applications Handbook of 1994. The...
This 80's circuit makes use of a photomultiplier valve. The circuit also requires a scintillation...