NJ7P SQL Tube Database Query

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6SD7
Semiremote-Cutoff Pentode

EIA Base & Outline

EIA Base: 8NEIA Bulb: 8-1

Substitute Data

Preferred Substitutes ......................... 6SK7
Substitutes ................................... 6AB7 6AC7 6AJ7

Mechanical Data

Bulb .......................................... MT-8
EIA Outline ................................... 8-1
EIA Base ...................................... 8N

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 9 pf
Output ........................................ 7.5 pf
Grid to Plate ................................. 0.0035 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -2 V
Plate Resistance (approx) ..................... 700K Ω
Transconductance .............................. 4250 µMho
Plate Current ................................. 9.5 mA
Grid No. 2 Current ............................ 3 mA

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This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

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

Fri, 03 Feb 2023 01:02:26 -0700