NJ7P SQL Tube Database Query

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6JA8
Triode - Pentode

EIA Base & Outline

EIA Base: 9DXEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 6CX8 6LF8
Substitutes ................................... 6LQ8 6LY8 6EB8 6GN8 6HF8 6JE8 6JT8 6JV8 6KR8 6KS8 6KV8
Source ........................................ GE - 1973

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-3
EIA Base ...................................... 9DX

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.75 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE - 1973
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 5.0 W
Grid No. 2 Dissipation ........................ 1.5 W

Triode
Source ........................................ GE - 1973
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 135 V
Grid No. 1 Voltage ............................ -1.5 V
Plate Resistance (approx) ..................... 70000 Ω
Transconductance .............................. 14000 µMho
Plate Current ................................. 18 mA
Grid No. 2 Current ............................ 4.0 mA

Triode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -2.0 V
Amplification Factor .......................... 70
Plate Resistance (approx) ..................... 19000 Ω
Transconductance .............................. 3700 µMho
Plate Current ................................. 3.5 mA

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(c) 1994-2021 by William A. Beech, NJ7P

Thu, 29 Sep 2022 01:39:36 -0700