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

GL851

Large General Electric power triode for substantial RF and audio amplifier service. Approximately 600 W plate dissipation and multi-kilovolt capability support several operating classes and useful transmitter service through the lower HF range.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4B
Base pins
-
Nominal heater
11 V / 15.5 A

Description

High-power transmitting triode for audio-frequency and radio-frequency amplifier/modulator service.

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
11 V
Nominal heater current
15.5 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
1800 Ω
Max plate voltage
2000 V
Max plate dissipation
750 W

Promoted fields mapped from printed ratings/characteristics headings; specialized published data retained in parameter rows.

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 resistance. . .. ........ ... . ....................... 1800 1500

    1600 ohms

    Plate resistance. . .. ........ ... . ....................... 1800 1500 1600 ohms

  • Load resistance.. ... .. ... ... 3700 3100

    5000 ohms

    Load resistance.. ... .. ... ... 3700 3100 5000 ohms

  • Effective load resistance, plate-to-plate. ... .............. 2600 4000

    5600 ohms

    Effective load resistance, plate-to-plate. ... .............. 2600 4000 5600 ohms

  • The tube may be operated at higher frequencies pro- that can be used up to

    15 MHz

    The tube may be operated at higher frequencies pro- that can be used up to 15 mc for the various classes of