1 Ea. ~ 9BJ11 ~ Dual Pentode ~ Tube ~ 12 Pin ~ RCA ~ NOS 

  • 9BJ11 Tube — Datasheet Overview

    The 9BJ11 is a dissimilar dual pentode designed primarily for television receiver circuits. One section is a sharp‑cutoff pentode, and the other is a beam power pentode, making it useful for mixed‑function control and amplification stages.

    Key Electrical Characteristics (from datasheet)

    Heater

    • Voltage: 9.6 V

    • Current: 0.45 A

    • Warm‑up time: ~11 seconds

    Interelectrode Capacitances

    Pentode section:

    • Grid 1 → Plate: 0.008 pF

    • Grid 1 → Cathode/Heater/Screen/Shield: 9.5 pF

    • Plate → Cathode/Heater/Screen/Shield: 3.4 pF

    Beam power section:

    • Grid 1 → Plate: 0.016 pF

    Tube Type & Construction

    • Type: Dissimilar dual pentode

    • Base: 12‑pin Duodecar (12FU)

    • Application: TV receiver amplifier and control circuits

    • New old stock in original package, may show signs of age. 

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