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.
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...