NJ7P SQL Tube Database Query

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3-250A4
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 ......................................... 4.6 pf
Output ........................................ 0.5 pf
Grid to Plate ................................. 2.9 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 ............................ -100 V
Grid No. 1 Current ............................ 94 mA
Plate Current ................................. 357 mA
Driving Power ................................. 29 W
Power Output (approx) ......................... 464 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 90 mA
Plate Current ................................. 333 mA
Driving Power ................................. 32 W
Power Output (approx) ......................... 750 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Current ............................ 60 mA
Plate Current ................................. 250 mA
Driving Power ................................. 22 W
Power Output (approx) ......................... 335 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -180 V
Grid No. 1 Current ............................ 45 mA
Plate Current ................................. 225 mA
Driving Power ................................. 17 W
Power Output (approx) ......................... 400 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -200 V
Grid No. 1 Current ............................ 38 mA
Plate Current ................................. 200 mA
Driving Power ................................. 14 W
Power Output (approx) ......................... 435 W

Class AB2 Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ 0 V
Peak Grid No. 1 Voltage........................ 460 V
Plate Current (Zero Signal) ................... 220 mA
Plate Current (Maximum Signal) ................ 700 mA
Driving Power ................................. 46 W
Load Resistance ............................... 4.2K Ω
Power Output (approx) ......................... 630 W

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Fri, 24 Jun 2022 19:23:47 -0700