0B2 Voltage Regulator Tube – Cold-Cathode Gas Regulator (108V)

The 0B2 is a cold-cathode, gas-filled voltage regulator tube that holds a steady 108V reference — among the tightest-regulating tubes in the miniature 0-series family.

• Tube type: Cold-cathode gas voltage regulator
• Base: 7-pin miniature
• Heater: None (cold-cathode, gas-ionization type)
• Typical use: Voltage reference/regulation in vintage radio, instrument, and amplifier power supplies

Part of the 0A2/0B2/0C2 family of 7-pin miniature-base regulators.