NJ7P SQL Tube Database Query

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6JK8
Dual High-Mu Triode

EIA Base & Outline

EIA Base: 9AJEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 6FW8 6KN8
Substitutes ................................... 6BC8 6BQ7 6BZ7 6DZ8
Source ........................................ GE - 1973

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-2
EIA Base ...................................... 9AJ

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.4 A

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ GE - 1973
Input ......................................... 3 pf
Output ........................................ 1 pf
Grid to Plate ................................. 1.4 pf

Triode 2
Source ........................................ GE - 1973
Input ......................................... 5 pf
Output ........................................ 4 pf
Grid to Plate ................................. 0.6 pf

Maximum Ratings (Design Center Values)

Triode 1
Source ........................................ GE - 1973
Plate Voltage ................................. 165 V
Plate Dissipation ............................. 1.0 W

Triode 2
Source ........................................ GE - 1973
Plate Voltage ................................. 200 V
Plate Dissipation ............................. 2.0 W

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ -1 V
Amplification Factor .......................... 55
Plate Resistance (approx) ..................... 8K Ω
Transconductance .............................. 6800 µMho
Plate Current ................................. 5.3 mA

Triode 2 Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 135 V
Grid No. 1 Voltage ............................ -1.2 V
Amplification Factor .......................... 70
Plate Resistance (approx) ..................... 5.4K Ω
Transconductance .............................. 13K µMho
Plate Current ................................. 10 mA

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Fri, 12 Aug 2022 14:43:47 -0700