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6AL11
Beam Power Tube - Sharp-Cutoff Pentode

Base & Bulb ( TS DS 12/01/63)

Substitute Data

Substitutes ................................... 6G11

Application

Duodecar type used as FM detector and audio-frequency output amplifier in television receivers. Requires duodecar 12-contact socket.

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.9 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)

Beam Pentode
Input ......................................... 11.0 pf
Output ........................................ 12.0 pf
Grid to Plate ................................. 0.26 pf

Direct Interelectrode Capacitances (approx)

Dual-Control Pentode
Grid No. 1 to Plate ........................... 0.034 pf
Grid No. 3 to Plate ........................... 3.2 pf
Grid No. 1 to All Except Plate (Input) ........ 6.5 pf
Grid No. 3 to All (Input) ..................... 7.5 pf
Grid No. 1 to Grid No. 3 ...................... 0.24 pf

Maximum Ratings (Design Center Values)

Beam Pentode
Plate Voltage ................................. 275 V
Grid No. 2 Voltage ............................ 275 V
Plate Dissipation ............................. 10 W
Grid No. 2 Dissipation ........................ 2.0 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 250K Ω
Self Bias ................................... 500K Ω

Maximum Ratings (Design Center Values)

Dual-Control Pentode
Plate Voltage ................................. 330 V
Positive Grid No. 3 Voltage ................... 28 V
Grid No. 2 Supply Voltage ..................... 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 1.7 W
Grid No. 2 Dissipation ........................ 1.1 W

Characteristics and Typical Operation

Beam Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -8.0 V
Peak Grid No. 1 Voltage........................ 8.0 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 6500 µ
Plate Current (Zero Signal) ................... 35 mA
Plate Current (Maximum Signal) ................ 39 mA
Grid No. 2 Current (Zero Signal) .............. 2.5 mA
Grid No. 2 Current (Maximum Signal) ........... 7.0 mA
Load Resistance ............................... 5K Ω
Power Output (approx) ......................... 4.2 W
Total Harmonic Distortion ..................... 10 %

Characteristics and Typical Operation

Dual-Control Pentode Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 2 Voltage ............................ 100 V
Plate Resistance (approx) ..................... 560 Ω
Grid No. 2 Current ............................ 150K mA
Grid No. 1 Voltage for Ib ..................... 1.3 µa @ 1000 V

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