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6T9
High-Mu Triode - Power Pentode

Base & Bulb ( GE 1973)

Mechanical Data

Bulb .......................................... T-9
Outline ....................................... 9-58
EIA Base ...................................... 12FM

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.93 A

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 1.5 W

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 275 V
Grid No. 2 Voltage ............................ 275 V
Plate Dissipation ............................. 12 W
Grid No. 2 Dissipation ........................ 2.0 W

Characteristics and Typical Operation

Triode
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -2.0 V
Amplification Factor .......................... 95
Plate Resistance (approx) ..................... 45K Ω
Transconductance .............................. 2100 µ
Plate Current ................................. 1.5 mA

Characteristics and Typical Operation

Pentode
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -8.0 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 6500 µ
Plate Current ................................. 35 mA
Grid No. 2 Current ............................ 2.5 mA
Load Resistance ............................... 5K Ω
Power Output (approx) ......................... 4.2 W

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