NJ7P SQL Tube Database Query

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833A
Power Triode

EIA Base & Outline

Application

Thoriated-tungsten-filament type used as af power amplifier and modulator and as rf power amplifier and oscillator. Plate dissipation is per section.

Requires special mounting and may be operated in vertical position with filament end up or down, or in horizontal position with all terminals in same in vertical plane.

Mechanical Data

EIA Base ...................................... F41

Electrical Data

Heater Voltage ................................ 10 V
Heater Current ................................ 10 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 12.3 pf
Output ........................................ 8.5 pf
Grid to Plate ................................. 6.3 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 3300 V
Plate Dissipation ............................. 350 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 2250 V
Grid No. 1 Voltage ............................ -125 V
Grid No. 1 Current ............................ 85 mA
Plate Current ................................. 445 mA
Driving Power ................................. 23 W
Power Output (approx) ......................... 780 W

Class C Oscillator/Amplifier
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -160 V
Grid No. 1 Current ............................ 70 mA
Plate Current ................................. 335 mA
Driving Power ................................. 20 W
Power Output (approx) ......................... 800 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 2500 V
Grid No. 1 Voltage ............................ -300 V
Grid No. 1 Current ............................ 75 mA
Plate Current ................................. 335 mA
Driving Power ................................. 30 W
Power Output (approx) ......................... 635 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -240 V
Grid No. 1 Current ............................ 70 mA
Plate Current ................................. 335 mA
Driving Power ................................. 26 W

Push Pull Class B Amplifier
Plate Voltage ................................. 3000 V
Grid No. 1 Voltage ............................ -70 V
Peak Grid No. 1 Voltage........................ 400 V
Plate Current (Zero Signal) ................... 100 mA
Plate Current (Maximum Signal) ................ 750 mA
Driving Power ................................. 20 W
Load Resistance ............................... 9.5K Ω
Power Output (approx) ......................... 1650 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

Mon, 04 Jul 2022 18:27:09 -0700