This circuit was found in a 90’s Popular Electronics. The power transistors must be equipped with radiators and the transformer has a 2 to 5 A secondary.
The oscillator of the figure has its frequency determined by the crystal. The indicated value is...
In the figure below we have a simple way to do chroming, silvering or another type of...
Using neon lamps, this circuit from a 1969 publication provides 17 V of maximum voltage or else...