Power source for tubes (T384E)

This experimental bench source was found in a modern book on tubes. The components used can be easily obtained.

Headlight Time Relay (CB6378E)
This circuit is from an Electronics World of 1967. The circuit slows down the activation of a...
Brake light for motorcycle (CB6485E)
This circuit was obtained from a Popular Electronics of the 90's. Any power MOSFET can be used as...
Regulator 0 to 40 V x 500 mA (CB14520E)
The integrated circuit used in this project is uncommon and so are the transistors, but they can...