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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.
The circuit shown is suggested by Motorola and consists of an amplifier with very high input...
The oscillator in the figure has its frequency determined by the crystal. The indicated value is...
This simple circuit has three electrodes that indicate the level using mercury in a small...