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6BN11
Sharp-Cutoff Twin Pentode

Base & Bulb ( GE DS 03/65)

Application

Duodecar type used as if amplifier tube in television receivers. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70
Outline ....................................... 9-58
EIA Base ...................................... 12GF
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.8 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component .............................. 100 V
Total DC and Peak ......................... 200 V
Heater Negative with Respect to Cathode
DC Component .............................. 200 V
Total DC and Peak ......................... 200 V

Direct Interelectrode Capacitances (approx)

Pentode 1
Input ......................................... 12.0 pf
Output ........................................ 2.8 pf
Grid to Plate ................................. 0.04 pf

Direct Interelectrode Capacitances (approx)

Pentode 2
Input ......................................... 12.0 pf
Output ........................................ 2.8 pf
Grid to Plate ................................. 0.03 pf

Maximum Ratings (Design Center Values)

Each Pentode
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3.1 W
Grid No. 2 Dissipation ........................ 0.65 W
Grid No. 1 Circuit Resistance
Self Bias ................................... 250K Ω

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 .............................. 13000 µ
Plate Current ................................. 11 mA
Grid No. 2 Current ............................ 3.8 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -3.0 V

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