NJ7P SQL Tube Database Query

A horizontal ribbon.

Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.

A horizontal ribbon.

3-250A2
Power Triode

EIA Base & Outline

EIA Base: 2N

Mechanical Data

EIA Base ...................................... 2N

Electrical Data

Heater Voltage ................................ 5.0 V
Heater Current ................................ 10.5 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 3.7 pf
Output ........................................ 0.7 pf
Grid to Plate ................................. 3.0 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 4000 V
Plate Dissipation ............................. 250 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -200 V
Grid No. 1 Current ............................ 45 mA
Plate Current ................................. 350 mA
Driving Power ................................. 22 W
Power Output (approx) ......................... 455 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -350 V
Grid No. 1 Current ............................ 45 mA
Plate Current ................................. 335 mA
Driving Power ................................. 29 W
Power Output (approx) ......................... 750 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -520 V
Grid No. 1 Current ............................ 29 mA
Plate Current ................................. 250 mA
Driving Power ................................. 24 W
Power Output (approx) ......................... 335 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -520 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 225 mA
Driving Power ................................. 16 W
Power Output (approx) ......................... 400 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -520 V
Grid No. 1 Current ............................ 14 mA
Plate Current ................................. 200 mA
Driving Power ................................. 11 W
Power Output (approx) ......................... 435 W

Class AB2 Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -40 V
Peak Grid No. 1 Voltage........................ 780 V
Plate Current (Zero Signal) ................... 200 mA
Plate Current (Maximum Signal) ................ 700 mA
Driving Power ................................. 38 W
Load Resistance ............................... 3.8K Ω
Power Output (approx) ......................... 580 W

A horizontal ribbon.

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.

Please enter the tube number:

This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

A horizontal ribbon.

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

Sat, 25 Jun 2022 16:39:07 -0700