0A4G Gas Regulator Tube – Cold-Cathode Voltage Reference Tube

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The 0A4G is a cold-cathode, gas-filled regulator tube from the same family as the 0A3 and 0C3, used to hold a steady reference voltage without a heated filament. Tube type: Cold-ca thode gas voltage regulator Base: Octal 8-pin Heater: None (cold-cathode, gas-ionization type) Typical use: Voltage reference/regulation in vintage radio and instrument power supplies Part of the 0-series cold-cathode regulator family — the "0" prefix denotes no heater requirement. Show more