NJ7P SQL Tube Database Query

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6HD7
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9QAEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 6GX7 6HJ7
Substitutes ................................... 6HD7 6HB7
Source ........................................ GE - 1973

Mechanical Data

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

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE - 1973
Plate Voltage ................................. 275 V
Grid No. 2 Voltage ............................ 3.5 V
Plate Dissipation ............................. 2.2 W
Grid No. 2 Dissipation ........................ 275 W

Triode
Source ........................................ GE - 1973
Plate Voltage ................................. 275 V
Plate Dissipation ............................. 1.5 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 125 V
Grid No. 1 Voltage ............................ -1 V
Transconductance .............................. 9500 µMho
Plate Current ................................. 19 mA

Pentode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1 V
Transconductance .............................. 7000 µMho
Plate Current ................................. 12 mA
Grid No. 2 Current ............................ 3.5 mA

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Mon, 06 Feb 2023 18:32:51 -0700