NJ7P SQL Tube Database Query

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12ED5
Beam Power Tube

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 12CA5 12EH5
Substitutes ................................... 12AS5 12C5 12CU5
Source ........................................ ARRL HB - 1964

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-5 1/2
EIA Base ...................................... 7CV

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 12.6 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ ARRL HB - 1964
Input ......................................... 14 pf
Output ........................................ 8.5 pf
Grid to Plate ................................. 0.26 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage ............................ -4.5 V
Plate Resistance (approx) ..................... 14K Ω
Transconductance .............................. 8500 µ
Plate Current ................................. 36 mA
Grid No. 2 Current ............................ 11 mA
Power Output (approx) ......................... 1.5 W

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

Sat, 25 Mar 2023 18:49:59 -0700