NJ7P SQL Tube Database Query

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1AF4
Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 6AREIA Bulb: 5-2

Substitute Data

Preferred Substitutes ......................... 1U4
Substitutes ................................... 1AM4

Mechanical Data

Bulb .......................................... T-5 1/2
EIA Outline ................................... 5-2
EIA Base ...................................... 6AR

Electrical Data

Filament Voltage .............................. 1.4 DC V
Filament Current .............................. 0.025 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.8 pf
Output ........................................ 7.6 pf
Grid to Plate ................................. 0.009 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 90 V

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 1.8M Ω
Transconductance .............................. 1050 µMho
Plate Current ................................. 1.8 mA
Grid No. 2 Current ............................ 0.55 mA

Class A Amplifier
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 2.2M Ω
Transconductance .............................. 925 µMho
Plate Current ................................. 1.2 mA
Grid No. 2 Current ............................ 0.32 mA

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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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Tue, 21 Mar 2023 03:36:45 -0700