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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.
This circuit has two high-impedance inputs. The gain is high and more inputs can be added. Use a...
This is a typical ohmmeter circuit with 50 uA analog instrument. The circuit was found in Radio...
Found in a Motorola manual from the 1960s, this circuit shows how to use a transistor in a static...