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Power - Triode (over 1000V 100W) ·Triode

833A

Widely used transmitting triode for AM transmitters, modulation, and industrial RF heating. Approximately 450 W plate dissipation and multi-kilovolt capability provide substantial RF power for broadcasting and industrial generator service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4B
Base pins: 4
Nominal heater: 10 V / 10 A

Description

Radiation- and forced-air-cooled transmitting triode widely used in AM transmitters and RF heating.

Socket description

Medium 4-pin bayonet

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4B
Base pins: 4
Nominal heater voltage: 10 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

Transconductance: 0.004 S
Amplification factor: 35
Max plate voltage: 4000 V
Max plate dissipation: 450 W
Max grid dissipation: 20 W
Max cathode current: 3 A

Highest published forced-air-cooled maximum values promoted from the maximum-ratings tables.

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

1945 United Electronics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Filament voltage
10 V
Filament current
10 A

Other

Maximum direct plate voltage
3000 V
Maximum plate dissipation
300 W
Maximum direct plate current
500 mA

Data set 02

1950 General Electric Transmitting Types

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
10 V
HeaterOrFilamentCurrent
10 A

Other

Maximum Signal Power Output
2700 W
ClassB;TwoTubes;ForcedAirCooling

Data set 03

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

HeaterOrFilamentVoltage
10 V
HeaterOrFilamentCurrent
10 A

Other

MaximumOperatingFrequency
75 MHz
Reduced ratings may apply at upper frequencies
Maximum Signal Power Output
2700 W
ClassB;TwoTubes;ForcedAirCooling

Data set 04

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
4000 V
RFPowerAmplifier;ClassC
Plate current
450 mA
RFPowerAmplifier;ClassC
Power output
1440 W
RFPowerAmplifier;ClassC
Control-grid voltage
-200 V
RFPowerAmplifier;ClassC
Grid current
75 mA
RFPowerAmplifier;ClassC
Maximum frequency at full input
30 MHz
RFPowerAmplifier

Capacitance

Grid-to-plate capacitance
6.3 pF
Section1
Grid-to-filament capacitance
12.3 pF
Section1
Plate-to-filament capacitance
8.5 pF
Section1

Data set 05

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Transconductance
0.004 A/V
Grid-Anode Capacitance
6.3 pF
Grid-Filament Capacitance
12.3 pF
Anode-Filament Capacitance
8.5 pF
RF Frequency Full Rating Maximum
30 MHz
RF Reduced Rating Maximum
75 MHz
Typical RF Output Power
1000 W
ClassC

Data set 06

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
4000 V
RFPowerAmplifier
Plate current
450 mA
RFPowerAmplifier
Power output
1440 W
RFPowerAmplifier
Control-grid voltage
-200 V
RFPowerAmplifier
Grid current
75 mA
RFPowerAmplifier
Maximum frequency at full input
30 MHz
RFPowerAmplifier

Capacitance

Grid-to-plate capacitance
6.3 pF
Section1
Grid-to-filament capacitance
12.3 pF
Section1
Plate-to-filament capacitance
8.5 pF
Section1

Data set 07

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor bogey
35

Capacitance

Grid-plate capacitance bogey
6.3 pF
Grid-filament capacitance bogey
12.3 pF
Plate-filament capacitance bogey
8.3 pF

Other

Maximum DC plate voltage
4000 V
Maximum plate dissipation
450 W

Data set 08

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Heater/filament voltage nominal
10 V
WholeTube
Heater/filament current nominal
10 A
WholeTube
Grid to filament
12.3 pF
Published source row
Plate to filament
8.5 pF
Published source row
to l imit temperature between these seals to
145
Published source row
No
124
Published source row
No (value 2)
-212
Published source row

Other

Voltage (AC or DC)
10 %
Published source row
Voltage (AC or DC) (value 2)
5 %
Published source row
Current at heater volts =
10 V
Published source row
Current at heater volts = (value 2)
10 V
Published source row
DC PLATE VOLTAGE
3000 V
Published source row
DC PLATE VOLTAGE (value 2)
3300 V
Published source row
MAX.-SIGNAL DC PLATE CURRENT*
500 mA
Published source row
MAX.-SIGNAL DC PLATE CURRENT* (value 2)
500 mA
Published source row
MAX.-SIGNAL PLATE INPUT*
1125 W
Published source row
MAX.-SIGNAL PLATE INPUT* (value 2)
1300 W
Published source row
PLATE DISSIPATION*
300 W
Published source row
PLATE DISSIPATION* (value 2)
350 W
Published source row
DC Plate Voltage
3000 V
Published source row
DC Plate Voltage (value 2)
3300 V
Published source row
DC Grid Voltage#
-70 V
Published source row
DC Grid Voltage# (value 2)
-80 V
Published source row
Peak AF Grid-to-Grid Voltage
400 V
Published source row
Peak AF Grid-to-Grid Voltage (value 2)
440 V
Published source row
Zero-Signal DC Plate Current
100 mA
Published source row
Zero-Signal DC Plate Current (value 2)
100 mA
Published source row
Max.-Signal DC Plate Current
750 mA
Published source row
Max.-Signal DC Plate Current (value 2)
780 mA
Published source row
DC PLATE VOLTAGE
4000 V
Published source row
DC PLATE VOLTAGE (value 2)
4000 V
Published source row
MAX.-SIGNAL DC PLATE CURRENT*
500 mA
Published source row
MAX.-SIGNAL DC PLATE CURRENT* (value 2)
500 mA
Published source row
MAX.-SIGNAL PLATE INPUT*
1600 W
Published source row
MAX.-SIGNAL PLATE INPUT* (value 2)
1800 W
Published source row
PLATE DISSIPATION*
400 W
Published source row
PLATE DISSIPATION* (value 2)
450 W
Published source row
DC Plate Voltage
4000 V
Published source row
DC Plate Voltage (value 2)
4000 V
Published source row
DC Grid Voltage#
-100 V
Published source row
DC Grid Voltage# (value 2)
-100 V
Published source row
Peak AF Grid-to-Grid Voltage
480 V
Published source row
Peak AF Grid-to-Grid Voltage (value 2)
510 V
Published source row
Zero-Signal DC Plate Current
100 mA
Published source row
Zero-Signal DC Plate Current (value 2)
100 mA
Published source row
Max.-Signal DC Plate Current
800 mA
Published source row
Max.-Signal DC Plate Current (value 2)
900 mA
Published source row
DC PLATE VOLTAGE
3000 V
Published source row
DC PLATE VOLTAGE (value 2)
3300 V
Published source row
DC PLATE CURRENT
300 mA
Published source row
DC PLATE CURRENT (value 2)
300 mA
Published source row
PLATE INPUT
450 W
Published source row
PLATE INPUT (value 2)
525 W
Published source row
PLATE DISSIPATION
300 W
Published source row
PLATE DISSIPATION (value 2)
350 W
Published source row
DC Plate Voltage
3000 V
Published source row
DC Plate Voltage (value 2)
3300 V
Published source row