This circuit is from a 1968 Electronic Design. The circuit uses transistors of the time that can be replaced with modern equivalents. More stages can be used to get higher tension.
This circuit was found in an American telecommunications documentation from the 1980s. The circuit...
This circuit is from a 1970 publication. The time constant is given by 1.3R x C where R is the...
This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is...