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6BH11
Medium-Mu Twin Triode - Sharp-Cutoff Pentode

Base & Bulb ( GE DS 04/64)

Substitute Data

Substitutes ................................... 8BU11

Application

Duodecar type used in color and black-and-white television receiver applications. The triode units are used for general-purpose applications, and the pentode unit is used for horizontal-deflection service. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70 Button 12-Pin
Outline ....................................... 9-58
EIA Base ...................................... 12FP
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
Input ......................................... 5.5 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 0.11 pf

Direct Interelectrode Capacitances (approx)

Triode 1
Input ......................................... 3.2 pf
Output ........................................ 1.4 pf
Grid to Plate ................................. 1.7 pf

Direct Interelectrode Capacitances (approx)

Triode 2
Input ......................................... 3.0 pf
Output ........................................ 0.6 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 350 V
Grid No. 2 Voltage ............................ 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.5 W
Grid No. 2 Dissipation ........................ 0.55 W
Cathode Current ............................... 20 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 2.2M Ω
Self Bias ................................... 2.2M Ω

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.5 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 2.2M Ω
Self Bias ................................... 2.2M Ω

Characteristics and Typical Operation

Tri Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 1 Voltage ............................ -1 V
Amplification Factor .......................... 46
Plate Resistance (approx) ..................... 5400 Ω
Transconductance .............................. 8500 µ
Plate Current ................................. 13.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -8 V

Characteristics and Typical Operation

Pent Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 7500 µ
Plate Current ................................. 12 mA
Grid No. 2 Current ............................ 4 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -8 V

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