NJ7P SQL Tube Database Query

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3W4
Power Pentode

EIA Base & Outline

EIA Base: 7BAEIA Bulb: 5-2

Substitute Data

Preferred Substitutes ......................... 3Q4
Substitutes ................................... 3S4 3Z4

Mechanical Data

EIA Outline ................................... 5-2
EIA Base ...................................... 7BA

Electrical Data

Heater Voltage ................................ 1/4/2.8 DC V
Heater Current ................................ 0.05/0.025 A

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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.

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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.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

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

Thu, 18 Aug 2022 18:57:11 -0700