NJ7P SQL Tube Database Query

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12EH5
Power Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 12CA5 12FX5
Substitutes ................................... 12DM5

Mechanical Data

Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-3
EIA Base ...................................... 7CV
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 12.6 V
Heater Current ................................ 0.6 A

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 2 Voltage ............................ 115 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 62 Ω
Plate Current ................................. 42 mA

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 140 V
Grid No. 2 Voltage ............................ 120 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Current ................................. 47 mA
Grid No. 2 Current ............................ 11 mA
Load Resistance ............................... 6000 Ω
Power Output (approx) ......................... 3.8 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

Tue, 28 Mar 2023 23:48:31 -0700