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Power - Triode ·Triode

831

High-power directly heated triode; available source material does not establish a narrower functional application confidently.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
11 V / 10 A

Description

RCA-831 R-F Power Amplifier, Oscillator RCA-831 is a high-power, air-cooled transmitting tube of the three-electrode type containing a thoriated-tungsten filament.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
11 V
Nominal heater current
10 A
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances
Amplification factor
14.5
Max plate voltage
3500 V
Max plate dissipation
400 W

RCA 831 directly heated thoriated-tungsten RF transmitting power triode for Class B telephony and Class C telephony/telegraphy. Maximum DC plate voltage up to 3500 V in specified modes; plate dissipation up to 400 W in Class B and Class C telegraphy (270 W in Class C telephony). Operating-mode ratings must be observed.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1938 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • D-C Plate Voltage . . 3500 3000

    3500 V

    D-C Plate Voltage . . 3500 3000 3500 Volts

  • D-C Plate Current . . 250 300

    350 mA

    D-C Plate Current . . 250 300 350 Milliamperes

  • Plate Input. . 600 650

    1200 W

    Plate Input. . 600 650 1200 Watts

  • Plate Dissipation .. 400 270

    400 W

    Plate Dissipation .. 400 270 400 Watts

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament Volts (a-c or d-¢)

    4 V

    Filament Volts (a-c or d-¢) . 11.0 Grid-Plate Capacitance .cicnnen 4 ppt

  • Filament Ampcres e

    3.8 A

    Filament Ampcres e 10 Grid-Filament Capacitance 3.8 upf

  • Amplification Factor

    1.4 A

    Amplification Factor ... 14.5 Plate-Filament Capacitance . 1.4 uuf

Other

  • D-C PLATE VOLTAGE ... e

    3500 V

    D-C PLATE VOLTAGE ... e 3500 3000 3500 Volts

  • D-C GrID VOLTAGE .. ——

    -1000 V

    D-C GrID VOLTAGE .. —— -1000 -1000 Volts

  • D-C PLATE CURRENT

    350 mA

    D-C PLATE CURRENT - 250 300 350 Milliamperes

  • D/C GRID CURRENT ucrvmmmemremsssmsssssnsrsns . —

    75 mA

    D/C GRID CURRENT ucrvmmmemremsssmsssssnsrsns . — 75 75 Milliamperes

  • PrLaTE INPUT

    1200 W

    PrLaTE INPUT 600 650 1200 Watts

  • PLATE DISSIPATION unoeerceccernricmmnnssanensasersnes

    400 W

    PLATE DISSIPATION unoeerceccernricmmnnssanensasersnes 400 270 400 Watts