NJ7P SQL Tube Database Query

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6GM8
Medium-Mu Twin triode

EIA Base & Outline

Substitute Data

Substitutes ................................... 6DJ8 6ES8
Source ........................................ GE - 1973

Mechanical Data

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

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.33 A

Direct Interelectrode Capacitances (approx)

Each Triode
Source ........................................ GE - 1973
Input ......................................... 3.0 pf
Output ........................................ 1.8 pf
Grid to Plate ................................. 1.3 pf

Maximum Ratings (Design Center Values)

Each Triode
Source ........................................ GE - 1973
Plate Voltage ................................. 30 V
Plate Dissipation ............................. 0.6 W

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 6.3 V
Grid No. 1 Voltage ............................ -0.4 V
Amplification Factor .......................... 14
Transconductance .............................. 2600 µ
Plate Current ................................. 0.9 mA

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

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

Mon, 27 Jun 2022 06:56:39 -0700