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6AF10
Dissimiliar Twin Pentode

Base & Bulb ( GE - 1973)

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.2 A

Maximum Ratings (Design Center Values)

Pentode 1 (Pins 6 8 9 10 & 11)
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 3.0 W
Grid No. 2 Dissipation ........................ 0.8 W

Maximum Ratings (Design Center Values)

Pentode 2 (Pins 2 3 4 5 & 6)
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 5.0 W
Grid No. 2 Dissipation ........................ 1.0 W

Characteristics and Typical Operation

Pentode 1 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -2.0 V
Peak Grid No. 1 Voltage........................ 2.0 V
Transconductance .............................. 10K µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 2.5 mA

Characteristics and Typical Operation

Pentode 2 Class A Amplifier
Plate Voltage ................................. 200 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 68 Ω
Plate Resistance (approx) ..................... 75K Ω
Transconductance .............................. 23K µ
Plate Current ................................. 22.0 mA
Grid No. 2 Current ............................ 4.0 mA

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