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6AH9
Medium-Mu Triode - Sharp-Cutoff Pentode

Base & Bulb ( GE DS 12/70)

Application

Duodecar type with frame grid used as color blanker and video output amplifier in color television receivers. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70 Button 12-Pin
Outline ....................................... 9-58
EIA Base ...................................... 12HJ
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
DC Component .............................. 200 V
Total DC and Peak ......................... 200 V

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 15 pf
Output ........................................ 6.0 pf
Grid to Plate ................................. 0.15 pf

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 2.4 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 3.7 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 400 V
Grid No. 2 Voltage ............................ 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 10 W
Grid No. 2 Dissipation ........................ 1 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 100K Ω
Self Bias ................................... 250k Ω

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 2 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -9 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 7300 Ω
Transconductance .............................. 2750 µ
Plate Current ................................. 8 mA

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ 0 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 122 Ω
Plate Resistance (approx) ..................... 55K Ω
Transconductance .............................. 21K µ
Plate Current ................................. 25 mA
Grid No. 2 Current ............................ 6 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -7.2 V

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 50 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ 0 V
Plate Current ................................. 76 mA
Grid No. 2 Current ............................ 32 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -18 V

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