Found in a Westinghouse Silicon Power Handbook from the 60s, this circuit makes use of period components. Special high voltage transistors are used. Zeners are 15 V.
The circuit shown was obtained in American documentation from 1968. MOSFETs can be replaced by...
This circuit is from the 1990 Motorola Linear Databook. The integrated circuit used is the LF355,...
This negative ion generator was found in a 90s Popular Electronics. The autotransformer can be an...