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6MJ8
Medium-Mu Triple Triode

Base & Bulb ( GE DS 11/67)

Application

Duodecar type used in matrixing-amplifier circuits of color and bw tv receivers. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70 Button 12-Pin
Outline ....................................... 9-60
EIA Base ...................................... 12HG
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)

Triode 1
Input ......................................... 2.9 pf
Output ........................................ 0.36 pf
Grid to Plate ................................. 2.8 pf

Direct Interelectrode Capacitances (approx)

Triode 2
Input ......................................... 2.9 pf
Output ........................................ 0.6 pf
Grid to Plate ................................. 2.8 pf

Direct Interelectrode Capacitances (approx)

Triode 3
Input ......................................... 3.0 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 2.8 pf

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage ................................. 330 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3.0 W
Grid No. 1 Circuit Resistance
Self Bias ................................... 1M Ω

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -10.5 V
Amplification Factor .......................... 17
Plate Resistance (approx) ..................... 5.6K Ω
Transconductance .............................. 3000 µ
Plate Current ................................. 10 mA
Grid No. 1 Voltage for Ib ..................... 50 µa @ -23 V

Characteristic Curves

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