Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

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

TBW79000

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

TBW79000 is a Philips water-cooled industrial RF-generator transmitting triode. 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
0.012 S
Amplification factor
24
Max plate voltage
8000 V
Max plate dissipation
6000 W
Max cathode current
1.8 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

    24

    Published

  • Transconductance

    12000 µS

    Published

Other

  • Maximum plate voltage

    8000 V

    Published limit

  • Maximum plate dissipation

    6000 W

    Published limit

  • Maximum plate/cathode current

    1.8 A

    Published limit

  • Maximum operating frequency

    50 MHz

    RFService

  • Plate voltage

    6000 V

    CharacteristicPoint

  • Plate current

    1 A

    CharacteristicPoint

  • Plate input power

    10.8 kW

    50 MHz

  • Plate dissipation

    3.3 kW

    50 MHz

  • Power output

    6.1 kW

    50 MHz

Capacitance

  • Plate-to-cathode capacitance

    1 pF

    Published

  • Grid capacitance

    14.2 pF

    Published

  • Grid-to-plate capacitance

    7.9 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

    32 A

  • Transconductance

    12000 uS

  • Amplification factor

    24

Other

  • Maximum plate voltage

    8000 V

  • Maximum plate dissipation

    6000 W

  • Maximum cathode current

    1.8 A

  • Operating plate voltage

    7200 V

    IndustrialRF;50MHz

  • Operating plate current

    1.5 A

    IndustrialRF;50MHz

  • Output power

    6100 W

    IndustrialRF;50MHz

  • Maximum anode input power

    12000 W

Capacitance

  • Plate/anode capacitance

    0.4 pF

  • Grid capacitance

    13.5 pF

  • Plate-grid capacitance

    7.4 pF