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

GL207

General Electric power triode intended for professional transmitting or amplifier service. The available manufacturer record does not support sufficiently reliable detailed operating figures in this pass, so the description remains deliberately conservative.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4B
Base pins
-
Nominal heater
22 V / 51 A

Description

The GL-207 is a three-electrode vacuum tube for radio-frequency power amplifier, oscillator, and Class-B modulator service, with a water-cooled plate capable of multi-kilowatt dissipation.

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
-
Nominal heater voltage
22 V
Nominal heater current
51 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
0.0057 S
Amplification factor
20
Max plate voltage
15000 V
Max plate dissipation
10000 W
Max cathode current
750 mA

Transmitting triode. Highest published plate-voltage and plate-dissipation limits promoted; service-specific alternatives retained as parameters.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    10000 V

    AverageCharacteristics

  • Plate Current

    750 mA

    AverageCharacteristics

  • Class C RF Maximum Plate Input

    30 kW

    KeyDown

  • Water Flow Minimum

    3 gal/min

    WaterCooling

Characteristic

  • Grid Voltage

    -310 V

    AverageCharacteristics

  • Grid-Plate Transconductance

    5700 uS

    AverageCharacteristics

  • Class B Audio Maximum Signal Plate Power Output

    22.5 kW

    TwoTubes