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6J11
Twin Pentode

Base & Bulb ( GE - 1973)

Mechanical Data

Bulb .......................................... T-9
Outline ....................................... 9-58
EIA Base ...................................... 12BW

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.8 A

Direct Interelectrode Capacitances (approx)

Pentode 1
Input ......................................... 11 pf
Output ........................................ 2.8 pf
Grid to Plate ................................. 0.04 pf

Direct Interelectrode Capacitances (approx)

Pentode 2
Input ......................................... 11 pf
Output ........................................ 3.2 pf
Grid to Plate ................................. 0.04 pf

Maximum Ratings (Design Center Values)

Pentode 1
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 3.1 W
Grid No. 2 Dissipation ........................ 0.65 W

Maximum Ratings (Design Center Values)

Pentode 2
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 3.1 W
Grid No. 2 Dissipation ........................ 0.65 W

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 56 Ω
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 13K µ
Plate Current ................................. 11 mA
Grid No. 2 Current ............................ 3.8 mA

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