0Y4 Gas Rectifier Tube – Cold-Cathode Half-Wave Rectifier

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The 0Y4 is a half-wave, cold-cathode gas rectifier with a starter anode, used to rectify AC into DC without a heated filament. Tube type: Cold-cathode gas rectifier Base: Octal 8-p in (5 pins wired) Heater: None (cold-cathode, gas-ionization type) Typical use: Rectifier stage in vintage radio and instrument power supplies Rated for a moderate 40-75mA current range — a lighter-duty cousin of the 0Z4 full-wave rectifier. Show more