NJ7P SQL Tube Database Query

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4KN8
Twin Triode

EIA Base & Outline

EIA Base: 9AJEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 4BZ8
Substitutes ................................... 4BC8 4BZ8 4BQ7 4BZ7

Electrical Data

Heater Voltage ................................ 4.2 V
Heater Current ................................ 0.6 A

For other characteristics and typical operation, see 6KN8

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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.

Please enter the tube number:

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, 30 Jun 2022 05:38:21 -0700