NJ7P SQL Tube Database Query

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25DN6
Beam Power Tube

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 25CD6
Substitutes ................................... 25EC6

Mechanical Data

Bulb .......................................... T-12
Base Type ..................................... Short Medium Shell Octal 8-Pin
EIA Outline ................................... 12-21
EIA Base ...................................... 5BT
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 25 V
Heater Current ................................ 0.6 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 22 pf
Output ........................................ 11.5 pf
Grid to Plate ................................. 0.8 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 700 V
Grid No. 2 Voltage ............................ 175 V
Plate Dissipation ............................. 15 W
Grid No. 2 Dissipation ........................ 3 W

For other characteristics and typical operation, see 6DN6

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, 02 Jul 2022 06:40:12 -0700