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Preferred Substitutes ......................... 3LF4
Substitutes ................................... 3D6
Source ........................................ ARRL HB - 1947
Source ........................................ ARRL HB - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-In 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 6BA
Source ........................................ ARRL HB - 1947
Filament Voltage .............................. 1.4/2.8 DC V
Filament Current .............................. 0.1/0.05 A
Class A Amplifier
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage ............................ -6.6 V
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 2200 µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 1.4 mA
Load Resistance ............................... 8K Ω
Power Output (approx) ......................... 0.40 W
Class A Amplifier
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -9.0 V
Plate Resistance (approx) ..................... 110K Ω
Transconductance .............................. 1600 µ
Plate Current ................................. 9.0 mA
Grid No. 2 Current ............................ 1.8 mA
Load Resistance ............................... 6K Ω
Power Output (approx) ......................... 0.3 W
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
Sun, 26 Jun 2022 03:22:25 -0700