NJ7P SQL Tube Database Query

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T55
Power Triode

EIA Base & Outline

Mechanical Data

EIA Base ...................................... 3G

Electrical Data

Heater Voltage ................................ 7.5 V
Heater Current ................................ 3.0 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 5.0 pf
Output ........................................ 1.2 pf
Grid to Plate ................................. 3.9 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 1500 V
Plate Dissipation ............................. 55 W

Characteristics and Typical Operation

Class C Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -170 V
Grid No. 1 Current ............................ 18 mA
Plate Current ................................. 150 mA
Driving Power ................................. 6.0 W
Power Output (approx) ......................... 170 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -195 V
Grid No. 1 Current ............................ 15 mA
Plate Current ................................. 125 mA
Driving Power ................................. 5.0 W
Power Output (approx) ......................... 145 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, 02 Jul 2022 07:38:36 -0700