GL6251

Water- and forced-air-cooled metal-ceramic transmitting tetrode for grounded-grid VHF television power amplification or oscillator service, rated for approximately 25 kW plate dissipation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 5.5 V / 190 A

Description

The GL-6251 is a water- and forced-air-cooled metal-ceramic transmitting tetrode for grounded-grid VHF television power-amplifier or oscillator service, with a 25-kW plate-dissipation rating.

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: 5.5 V
Nominal heater current: 190 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

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 7000 V
Max screen voltage: 700 V
Max plate dissipation: 25000 W
Max grid dissipation: 150 W
Max cathode current: 8 A

Water/forced-air-cooled VHF transmitting tetrode; television-service absolute maxima promoted.

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

Tetrode

Other

DC Plate Current Maximum
8 A
ClassB Television
Plate Input Maximum
50 kW
ClassB Television
Typical DC Plate Voltage
6800 V
GroundedGrid 216MHz
Typical Screen Voltage
600 V
GroundedGrid 216MHz
Peak Cathode Current
30 A
Water Outlet Temperature Maximum
70 C
WaterCooling