Power source for tubes (T384E)

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

Analog Counter (CB6140E)
This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current...
New Low-Power PIC24 “GA7” Microcontroller Family Now Available
New Low-Power PIC24 “GA7” Microcontroller Family Now Available CHANDLER, Ariz., Dec. 12, 2016 — The...
Polarity Converter (CB5289E)
This circuit was found in a 1976 NASA manual, making use of components of the time. The transistor...