NJ7P SQL Tube Database Query

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1AK4
Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 1AD4EIA Bulb: 2-1

Substitute Data

Preferred Substitutes ......................... 1AH4
Substitutes ................................... 5875

Mechanical Data

Bulb .......................................... T-2x3
EIA Outline ................................... 2-1
EIA Base ...................................... 1AD4

Electrical Data

Heater Voltage ................................ 1.25 DC V
Heater Current ................................ 0.02 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 01:53:37 -0700