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6BD11
High-Mu Triode - Medium-Mu - Sharp-Cutoff Pentode

Base & Bulb ( GE DS 12/63)

Substitute Data

Preferred Substitutes ......................... 6AF11 6AS11

Application

Duodecar type used in tv receiver applications. Triode 1 is used in general-purpose applications, triode 2 is used as sync-separator circuits and the pentode used as a video amplifier. Requires duodecar 12-contact socket.

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.05 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)

Triode 1
Input ......................................... 3.0 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 1.9 pf

Direct Interelectrode Capacitances (approx)

Triode 2
Input ......................................... 2.4 pf
Output ........................................ 3.8 pf
Grid to Plate ................................. 3.6 pf

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 11.0 pf
Output ........................................ 4.6 pf
Grid to Plate ................................. 0.13 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 4 W
Grid No. 2 Dissipation ........................ 1.1 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω
Self Bias ................................... 1M Ω

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 1.5 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 500K Ω
Self Bias ................................... 1M Ω

Maximum Ratings (Design Center Values)

Triode 2
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 500K Ω
Self Bias ................................... 1M Ω

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 68
Plate Resistance (approx) ..................... 12.4K Ω
Transconductance .............................. 5500 µ
Plate Current ................................. 7 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -5.5 V

Characteristics and Typical Operation

Triode 2 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 220 Ω
Amplification Factor .......................... 41
Plate Resistance (approx) ..................... 9.4K Ω
Transconductance .............................. 4400 µ
Plate Current ................................. 9.2 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -6.5 V

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 100 Ω
Plate Resistance (approx) ..................... 45K Ω
Transconductance .............................. 10400 µ
Plate Current ................................. 17 mA
Grid No. 2 Current ............................ 4 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -6 V

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