This circuit is from a time when this type of feature was not common in line cars. The pulse transformer has a 1: 1 turn ratio and the SCR admits equivalents.
This amplifier circuit for the 7 MHz band, which corresponds to the 40-meter band of radio...
This high-power circuit from a Popular Electronics of the 80's makes use of common SCRs that admit...
This circuit is from an American documentation from 1975. The single junction transistors can be...