NJ7P SQL Tube Database Query

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4KF8
Twin Pentode

EIA Base & Outline

EIA Base: 9FGEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 4BU8
Substitutes ................................... 4GS8 4HS8

Electrical Data

Heater Voltage ................................ 4.2 V
Heater Current ................................ 0.45 A

For other characteristics and typical operation, see 6KF8

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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

Sun, 05 Feb 2023 19:04:33 -0700