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

TBW78000

Transmitting power triode intended for RF amplification, oscillator, modulation, or industrial generator service. Manufacturer documentation emphasizes professional radio-frequency operation and substantial power handling.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
12.6 V / 33 A

Description

TBW78000 is a Philips water-cooled high-power transmitting triode for industrial RF generators and transmitters. Its datasheet specifies direct-filament operation, RF power ratings, cooling requirements, capacitances and representative operating conditions.

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
12.6 V
Nominal heater current
33 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
0.015 S
Amplification factor
32
Max plate voltage
7200 V
Max plate dissipation
6000 W
Max cathode current
2.2 A

Published filament data, capacitances, typical characteristics, limiting values and RF operating conditions reviewed.

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

1963 Philips Electron Tubes Handbook V4

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament voltage

    12.6 V

    DirectlyHeated

  • Filament current

    33 A

    DirectlyHeated

  • Amplification factor

    32

    Published

  • Transconductance

    15000 µS

    Published

Other

  • Maximum plate voltage

    7200 V

    Published limit

  • Maximum plate dissipation

    6000 W

    Published limit

  • Maximum plate/cathode current

    2.2 A

    Published limit

  • Maximum operating frequency

    50 MHz

    RFService

  • Plate voltage

    6500 V

    30 MHz

  • Plate current

    2 A

    30 MHz

  • Plate input power

    13 kW

    30 MHz

  • Plate dissipation

    3.5 kW

    30 MHz

  • Power output

    9.5 kW

    30 MHz

Capacitance

  • Plate-to-cathode capacitance

    0.3 pF

    Published

  • Grid capacitance

    16 pF

    Published

  • Grid-to-plate capacitance

    11 pF

    Published

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Heater/filament voltage

    12.6 V

  • Heater/filament current

    33 A

  • Transconductance

    15000 uS

  • Amplification factor

    32

Other

  • Maximum plate voltage

    7200 V

  • Maximum plate dissipation

    6000 W

  • Maximum cathode current

    2.2 A

  • Operating plate voltage

    6500 V

    ClassC;Telegraphy;30MHz

  • Operating plate current

    2 A

    ClassC;Telegraphy;30MHz

  • Output power

    9500 W

    ClassC;Telegraphy;30MHz

  • Maximum anode input power

    14000 W

Capacitance

  • Plate/anode capacitance

    0.3 pF

  • Grid capacitance

    16 pF

  • Plate-grid capacitance

    11 pF