Without regulation, this basic circuit has the output current, and voltage determined by the transformer. The input can be 110 V and 220 V if the transformer used is of the indicated type.
We found this circuit in a Radio Electronics from April 1965. The components are from the time and the...
This old integrated amplifier is from a Japanese publication from 1972. The integrated circuit is...
This circuit is from an old European documentation, already influencing the unijunction oscillator that...