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6U10
Two Medium-Mu Triodes - High-Mu Triode

Base & Bulb ( GE DS 04/64)

Substitute Data

Preferred Substitutes ......................... 6AC10

Application

Duodecar type used in amplifier applications. Triodes 1 & 3 are medium-mu and triode 2 is high-mu. Requires duodecar 12-contact socket.

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.6 A
Heater Warm-up Time ........................... 11 s
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

Maximum Ratings (Design Center Values)

Triode 1
Plate Voltage ................................. 1.7 V
Grid No. 3 Voltage ............................ 0.26 V
Grid No. 2 Supply Voltage ..................... 1.3 V
Grid No. 2 Voltage ............................ V
Negative Grid No. 1 Voltage ................... V
Positive Grid No. 1 Voltage ................... V
Plate Input ................................... W
Plate Dissipation ............................. W
Grid No. 2 Dissipation ........................ W
Plate Current ................................. mA
Grid Current .................................. mA
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. Ω
Self Bias ................................... Ω
Bulb Temperature (At Hottest Point) ........... °C

Maximum Ratings (Design Center Values)

Triode 2
Plate Voltage ................................. 1.5 V
Grid No. 3 Voltage ............................ 0.28 V
Grid No. 2 Supply Voltage ..................... 1.3 V
Grid No. 2 Voltage ............................ V
Negative Grid No. 1 Voltage ................... V
Positive Grid No. 1 Voltage ................... V
Plate Input ................................... W
Plate Dissipation ............................. W
Grid No. 2 Dissipation ........................ W
Plate Current ................................. mA
Grid Current .................................. mA
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. Ω
Self Bias ................................... Ω
Bulb Temperature (At Hottest Point) ........... °C

Maximum Ratings (Design Center Values)

Triode 3
Plate Voltage ................................. 1.8 V
Grid No. 3 Voltage ............................ 0.9 V
Grid No. 2 Supply Voltage ..................... 1.2 V
Grid No. 2 Voltage ............................ V
Negative Grid No. 1 Voltage ................... V
Positive Grid No. 1 Voltage ................... V
Plate Input ................................... W
Plate Dissipation ............................. W
Grid No. 2 Dissipation ........................ W
Plate Current ................................. mA
Grid Current .................................. mA
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. Ω
Self Bias ................................... Ω
Bulb Temperature (At Hottest Point) ........... °C

Maximum Ratings (Design Center Values)

Triode 1/3
Plate Voltage ................................. 330 V
Negative Grid No. 1 Voltage ................... -50 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.0 W
Cathode Current ............................... 20 mA
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω
Self Bias ................................... 2M Ω

Maximum Ratings (Design Center Values)

Triode 2
Plate Voltage ................................. 330 V
Negative Grid No. 1 Voltage ................... -50 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 1.0 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 500K Ω
Self Bias ................................... 1M Ω

Characteristics and Typical Operation

Triode 1/3 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -6 V
Amplification Factor .......................... 17.5
Plate Resistance (approx) ..................... 7.7K Ω
Transconductance .............................. 2300 µ
Plate Current ................................. 9.5 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -15 V

Characteristics and Typical Operation

Triode 2 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -1.5 V
Amplification Factor .......................... 90
Plate Resistance (approx) ..................... 61K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 1.2 mA
Grid No. 1 Voltage for Ib ..................... 35 µa @ -3 V

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