0C3 / VR105 Voltage Regulator Tube – Cold-Cathode Gas Regulator (105V)

The 0C3 (VR105) is a cold-cathode, gas-filled voltage regulator tube prized for its tight 105V regulation.

• Tube type: Cold-cathode gas voltage regulator
• Base: Octal 8-pin
• Heater: None (cold-cathode, gas-ionization type)
• Typical use: Voltage reference/regulation in vintage radio, instrument, and amplifier power supplies

Also cataloged as VR105 — the tightest-regulating tube in the octal 0A3/0B3/0C3/0D3 family.