NJ7P SQL Tube Database Query

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7AF7
Medium-Mu twin triode

EIA Base & Outline

EIA Base: 8ACEIA Bulb: 9-30

Substitute Data

Preferred Substitutes ......................... 7N7

Mechanical Data

Bulb .......................................... T-9
Base Type ..................................... Lock-in 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 8AC

Electrical Data

Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -10 V
Amplification Factor .......................... 16
Plate Resistance (approx) ..................... 7600 Ω
Transconductance .............................. 2100 µMho
Plate Current ................................. 9 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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Complete Tube Manuals:
Tube Manual Index from NJ7P

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Mon, 28 Nov 2022 00:29:29 -0700