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.
This is basically the same circuit as the previous one, but using PNP transistors. In the original...
The output stage of this amplifier can operate at high voltage. The transistor must be a high...
This circuit has an input resistance of 100M ohms which makes it possible to detect currents as...