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6JZ8
Medium-Mu Triode - Power Pentode

Base & Bulb ( GE DS 12/63)

Substitute Data

Substitutes ................................... 6LU8

Application

Duodecar type used in combined vertical-deflection oscillator and amplifier in tv receivers. Requires duodecar 12-contact socket.

Mechanical Data

Bulb .......................................... T-9
Base .......................................... E12-70 Button 12-Pin
Outline ....................................... 9-58
EIA Base ...................................... 12DZ
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.2 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)

Pentode
Input ......................................... 11.0 pf
Output ........................................ 7.0 pf
Grid to Plate ................................. 0.34 pf

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 2.2 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 3.6 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 200 V
Plate Dissipation ............................. 7 W
Grid No. 2 Dissipation ........................ 1.8 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω
Self Bias ................................... 2.2M Ω

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 250 V
Plate Dissipation ............................. 1 W
Grid No. 1 Circuit Resistance
Fixed Bias .................................. 1M Ω
Self Bias ................................... 2.2M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -5 V
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 8500 Ω
Transconductance .............................. 2350 µ
Plate Current ................................. 5.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -11 V

Characteristics and Typical Operation

Pentode Class A Amplifier
Plate Voltage ................................. 120 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -8 V
Plate Resistance (approx) ..................... 11700 Ω
Transconductance .............................. 7100 µ
Plate Current ................................. 46 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 100 µa @ -25 V

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