This small battery-powered high-voltage generator was found in Radio Electronics magazine from June 1965. The transformer is the power supply type determining the output voltage,
This amplifier was found in a Japanese publication in 1972. Transistors are uncommon today, and...
The current of this source is 200 mA at the most, and the output depends on the zener that may...
Found in Mallory documentation from 1968 this circuit uses an integrated circuit from that time. The...