Power source for tubes (T384E)

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

Super Touch Sensor (CB10997E)
This circuit is from an April 2000 Poptronics. The magazine no longer exists, but the circuit can...
4 to 55 MHz amplifier (CB9166E)
This broadband amplifier was found in an Elektor from the 90's. The gain is 10 dB with a noise...
PUT and SCR Phase Control (CB4255E)
We found this load control circuit on the power grid using a SCR and PUT in a thyristor manual...