NJ7P SQL Tube Database Query

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2EA5
Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 2EV5

Mechanical Data

Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7EW
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 2.4 V
Heater Current ................................ 0.6 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.8 pf
Output ........................................ 2.3 pf
Grid to Plate ................................. 0.06 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -1 V
Plate Resistance (approx) ..................... 150K Ω
Transconductance .............................. 8000 µ
Plate Current ................................. 10 mA

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.

(c) 1994-2021 by William A. Beech, NJ7P

Thu, 30 Jun 2022 04:28:43 -0700