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

849

Radiation- and forced-air-cooled transmitting triode for AM broadcasting and industrial RF heating. Approximately 400 W plate dissipation and multi-kilovolt capability provide substantial RF power for broadcast and industrial generator applications.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
JUMBO3
Base pins
3
Nominal heater
11 V / 5 A

Description

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

Socket description

Jumbo 3-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
JUMBO3
Base pins
3
Nominal heater voltage
11 V
Nominal heater current
5 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
Plate resistance
3200 Ω
Transconductance
0.006 S
Amplification factor
19
Max plate voltage
3000 V
Max plate dissipation
400 W
Max cathode current
350 mA

Maximum ratings and characteristic constants promoted where reliably published in the approved sheet.

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

  • HeaterVoltageNominal

    11 V

    Nominal

  • HeaterCurrentNominal

    5 A

    Nominal

  • Maximum Plate Voltage

    3000 V

  • Maximum Plate Dissipation

    400 W

  • RFPowerOutput

    560 W

    ClassC Telegraphy; 2500 V plate

Characteristic

  • Amplification Factor

    19

    Typical

Data set 02

1945 United Electronics

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Filament voltage

    11 V

  • Filament current

    5 A

  • Plate resistance

    3200 ohm

  • Mutual conductance

    6000 uS

  • Amplification factor

    19

Other

  • Maximum direct plate voltage

    3000 V

  • Maximum plate dissipation

    400 W

  • Maximum direct plate current

    350 mA

Data set 03

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Grid To Plate Capacitance

    33 pF

    Published direct interelectrode capacitance

  • Grid To Filament Capacitance

    11 pF

    Published direct interelectrode capacitance

Data set 04

1956 RCA Transmitting Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    11 V

  • HeaterOrFilamentCurrent

    5 A

Other

  • MaximumOperatingFrequency

    30 MHz

    Reduced ratings may apply at upper frequencies

  • Plate Input

    875 W

    ClassC

Data set 05

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    2500 V

    RFPowerAmplifier;ClassC

  • Plate current

    350 mA

    RFPowerAmplifier;ClassC

  • Power output

    630 W

    RFPowerAmplifier;ClassC

  • Control-grid voltage

    -250 V

    RFPowerAmplifier;ClassC

  • Grid current

    13 mA

    RFPowerAmplifier;ClassC

  • Maximum frequency at full input

    3 MHz

    RFPowerAmplifier

Capacitance

  • Grid-to-plate capacitance

    33 pF

    Section1

  • Grid-to-filament capacitance

    11 pF

    Section1

  • Plate-to-filament capacitance

    2 pF

    Section1

Data set 06

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    2500 V

    RFPowerAmplifier

  • Plate current

    350 mA

    RFPowerAmplifier

  • Power output

    630 W

    RFPowerAmplifier

  • Control-grid voltage

    -250 V

    RFPowerAmplifier

  • Grid current

    13 mA

    RFPowerAmplifier

  • Maximum frequency at full input

    3 MHz

    RFPowerAmplifier

Capacitance

  • Grid-to-plate capacitance

    33 pF

    Section1

  • Grid-to-filament capacitance

    11 pF

    Section1

  • Plate-to-filament capacitance

    2 pF

    Section1