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

BW137

Water-cooled transmitting triode for HF amplifier and oscillator service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
18 V / 400 A

Description

Water-cooled transmitting triode for HF amplifier and oscillator service.

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
18 V
Nominal heater current
400 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
0.03 S
Amplification factor
40
Max plate voltage
15000 V
Max plate dissipation
40000 W
Max grid dissipation
3000 W

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament Voltage

    18 V

  • Filament Current

    400 A

  • Amplification Factor

    40

  • Transconductance

    30000 uS

Other

  • Maximum Anode Voltage

    15000 V

  • Maximum Anode Dissipation

    40000 W

  • Maximum Grid Dissipation

    3000 W

  • Frequency at Full Ratings

    50 MHz

Capacitance

  • Anode-Grid Capacitance

    55 pF

  • Anode-Cathode Capacitance

    2 pF

  • Grid-Cathode Capacitance

    80 pF

Construction

  • Cooling

    Water plus seal air