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6M11
Twin High-Mu Triode - Sharp-Cutoff Pentode

Base & Bulb ( GE DS 04/63)

Application

Duodecar type used in general applications. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70 Button 12-Pin
Outline ....................................... 9-56
EIA Base ...................................... 12CA
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.75 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
Total DC and Peak ......................... 200 V

Direct Interelectrode Capacitances (approx)

Each Triode
Input ......................................... 3.4 pf
Output ........................................ 0.8 pf
Grid to Plate ................................. 1.8 pf

Direct Interelectrode Capacitances (approx)

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

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.25 W
Grid No. 1 Circuit Resistance
Self Bias ................................... 680K Ω

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 ............................. 3.1 W
Grid No. 2 Dissipation ........................ 0.65 W
Grid No. 1 Circuit Resistance
Self Bias ................................... 1M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 120 Ω
Amplification Factor .......................... 58
Plate Resistance (approx) ..................... 10K Ω
Transconductance .............................. 8K µ
Plate Current ................................. 8 mA
Grid No. 1 Voltage for Ib ..................... 50 µa @ -4.5 V

Characteristics and Typical Operation

Pentode 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 ............................ 3.4 mA
Grid No. 1 Voltage for Ib ..................... 20 µa @ -3.5 V

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