HF3000

Large all-glass radiation- or air-cooled transmitting triode for high-power RF amplifier service. Rated for approximately 2.5 kW plate dissipation and 8 kV plate voltage, with a heavy filament suited to major professional transmitters.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 21.5 V / 40.5 A

Description

All-glass radiation/air-cooled high-power transmitting triode for high-power RF amplifier 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: 21.5 V
Nominal heater current: 40.5 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

Transconductance: 0.0065 S
Amplification factor: 16
Max plate voltage: 8000 V
Max plate dissipation: 2500 W

Published general characteristics and maximum ratings 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

1953 Amperex

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Grid-to-plate capacitance
10 pF
Direct interelectrode capacitance
Grid-to-filament capacitance
13 pF
Direct interelectrode capacitance
Plate-to-filament capacitance
4 pF
Direct interelectrode capacitance
Filament voltage
21.5 V
Filament current
40.5 A