This circuit that converts voltages from a battery into high voltages for tube circuits was found in Radio Electronics magazine from February 1960. The transformer is of a special type.
This circuit is from an old documentation. However, it can be mounted with modern equivalent...
Using the 723 integrated circuit, this circuit was found in an article on power supplies in the...
A low voltage heating element (up to 30 V) with a current of up to 3 A can be precisely controlled with...