NJ7P SQL Tube Database Query

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840
R.F. Pentode

EIA Base & Outline

EIA Base: 5J
Source ........................................ ARRL HB -1947

Mechanical Data

EIA Base ...................................... 5J

Electrical Data

Heater Voltage ................................ 2 V
Heater Current ................................ 0.13 A

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 400
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 400 µMho
Plate Current ................................. 1.0 mA
Grid No. 2 Current ............................ 0.7 mA

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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.

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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.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

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Tue, 29 Nov 2022 00:23:03 -0700