NJ7P SQL Tube Database Query

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3-300A2
Power Triode

EIA Base & Outline

EIA Base: 4BC

Mechanical Data

EIA Base ...................................... 4BC

Electrical Data

Heater Voltage ................................ 5/10 V
Heater Current ................................ 25/12.5 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 12.1 pf
Output ........................................ 0.8 pf
Grid to Plate ................................. 8.6 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 3000 V
Plate Dissipation ............................. 300 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -250 V
Grid No. 1 Current ............................ 90 mA
Plate Current ................................. 665 mA
Driving Power ................................. 33 W
Power Output (approx) ......................... 700 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -300 V
Grid No. 1 Current ............................ 85 mA
Plate Current ................................. 600 mA
Driving Power ................................. 36 W
Power Output (approx) ......................... 900 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -500 V
Grid No. 1 Current ............................ 30 mA
Plate Current ................................. 250 mA
Driving Power ................................. 18 W
Power Output (approx) ......................... 410 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2000 V
Grid No. 1 Voltage ............................ -500 V
Grid No. 1 Current ............................ 75 mA
Plate Current ................................. 500 mA
Driving Power ................................. 52 W
Power Output (approx) ......................... 810 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -525 V
Grid No. 1 Current ............................ 18 mA
Plate Current ................................. 200 mA
Driving Power ................................. 11 W
Power Output (approx) ......................... 425 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -550 V
Grid No. 1 Current ............................ 50 mA
Plate Current ................................. 400 mA
Driving Power ................................. 36 W
Power Output (approx) ......................... 830 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -118 V
Peak Grid No. 1 Voltage........................ 236 V
Plate Current (Zero Signal) ................... 270 mA
Plate Current (Maximum Signal) ................ 572 mA
Driving Power ................................. 0 W
Load Resistance ............................... 2.54K Ω
Power Output (approx) ......................... 256 W

Push Pull Class AB1 Amplifier
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -230 V
Peak Grid No. 1 Voltage........................ 460 V
Plate Current (Zero Signal) ................... 160 mA
Plate Current (Maximum Signal) ................ 483 mA
Driving Power ................................. 0 W
Load Resistance ............................... 8.5K Ω
Power Output (approx) ......................... 610 W

Push Pull Class AB2 Amplifier
Plate Voltage ................................. 1500 V
Grid No. 1 Voltage ............................ -118 V
Peak Grid No. 1 Voltage........................ 490 V
Plate Current ................................. 1140 mA
Driving Power ................................. 39 W
Load Resistance ............................... 2.75K Ω
Power Output (approx) ......................... 1100 W

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Thu, 11 Aug 2022 13:02:44 -0700