The H724 and Sprague Capacitors There are two variants of the power supply used in the PDP-8/E: H724 (115VAC) and H724A (230VAC). These are essentially the same power supply, with minor changes to the power line plug, circuit breaker and wiring on the primary side of the two mains-voltage transformers. Although this page mentions the … Continue reading PDP-8/e Line to Earth Capacitors<..

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