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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.
We found this circuit in an old American documentation. Transistors can be modern equivalents. ...
From an article in Radio Electronics magazine, May 1989, this circuit requires a dual power...
This circuit provides a reference voltage for calibration. He uses a diode in a small thermal...