NJ7P SQL Tube Database Query

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830B
Power Triode

EIA Base & Outline

Application

Thoriated-tungsten-filament type used as af power amplifier and modulator and as rf power amplifier and oscillator.

Requires small four-contact socket and may be operated in vertical position with base down, or in horizontal position with pins 1 and 4 in vertical plane.

Mechanical Data

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

Electrical Data

Heater Voltage ................................ 10 V
Heater Current ................................ 2 A

Direct Interelectrode Capacitances (approx)

Triode
Input ......................................... 5 pf
Output ........................................ 1.8 pf
Grid to Plate ................................. 11 pf

Maximum Ratings (Design Center Values)

Triode
Plate Voltage ................................. 1000 V
Plate Dissipation ............................. 60 W

Characteristics and Typical Operation

Class C Oscillator/Amplifier
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -110 V
Grid No. 1 Current ............................ 30 mA
Plate Current ................................. 140 mA
Driving Power ................................. 7.0 W
Power Output (approx) ......................... 90 W

Class C Modulated Amplifier (Plate)
Plate Voltage ................................. 800 V
Grid No. 1 Voltage ............................ -150 V
Grid No. 1 Current ............................ 20 mA
Plate Current ................................. 95 mA
Driving Power ................................. 5.0 W
Power Output (approx) ......................... 50 W

Push Pull Class B Amplifier
Plate Voltage ................................. 1000 V
Grid No. 1 Voltage ............................ -35 V
Peak Grid No. 1 Voltage........................ 270 V
Plate Current (Zero Signal) ................... 20 mA
Plate Current (Maximum Signal) ................ 280 mA
Driving Power ................................. 6.0 W
Load Resistance ............................... 7.6K Ω
Power Output (approx) ......................... 175 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

Thu, 30 Jun 2022 07:24:20 -0700