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This circuit is from a 1967 RCA SCR manual. The circuit uses components from the era that can be replaced by modern equivalents. The transformer is 12 V x 1.2 A.
Found in a 1960 Sylvania transistor manual, this circuit can be implemented with modern...
Suggested by a 1968 Motorola power semiconductor manual, this circuit uses a special transformer and...
This circuit, which can act as a shield, was found in an American documentation from the 90s. The...