NJ7P SQL Tube Database Query

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4BU8
Sharp-Cutoff Twin Pentode

EIA Base & Outline

EIA Base: 9FGEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 4HS8 4KF8
Substitutes ................................... 4GS8
Source ........................................ RCA RC-29 - 1975

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 4.2 V
Heater Current ................................ 0.45 A

Source ........................................ RCA RC-29 - 1975
For other characteristics and typical operation, see 6BU8

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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.

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Complete Tube Manuals:
Tube Manual Index from NJ7P

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Tue, 21 Mar 2023 05:01:08 -0700