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

HF300

Radiation-cooled Amperex transmitting triode widely used in RF heating and commercial or police transmitters. Rated for approximately 200 W plate dissipation and 3 kV plate operation, with RF output around 600 W.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
4
Nominal heater
11.5 V / 4 A

Description

HF300 is a Triode device in the supplied Amperex literature. Radiation-cooled triode widely used in RF heating and commercial/police transmitters.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
4
Nominal heater voltage
11.5 V
Nominal heater current
4 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
0.0056 S
Amplification factor
23
Max plate voltage
3000 V
Max plate dissipation
200 W
Max cathode current
250 mA

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

    7 pF

    Direct interelectrode capacitance

  • Grid-to-filament capacitance

    6 pF

    Direct interelectrode capacitance

  • Plate-to-filament capacitance

    1 pF

    Direct interelectrode capacitance

  • Filament voltage

    11.5 V

  • Filament current

    4 A

Data set 02

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Amplification factor

    23

  • Grid-to-plate capacitance

    7 pF

  • Grid-to-filament capacitance

    6 pF

  • Plate-to-filament capacitance

    1 pF

Other

  • Maximum plate dissipation

    200 W

  • Plate voltage

    3000 V

    RF ClassC

  • Plate current

    250 mA

    RF ClassC

  • Power output

    600 W

    RF ClassC

  • Grid voltage

    -400 V

    RF ClassC

  • Grid current

    28 mA

    RF ClassC

  • Maximum frequency

    20 MHz

Data set 03

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate voltage

    3000 V

    RFAmplifierOrOscillator

  • Plate current

    250 mA

    RFAmplifierOrOscillator

  • RF output power

    600 W

    RFAmplifierOrOscillator

  • Grid voltage

    -400 V

    RFAmplifierOrOscillator

  • Grid current

    28 mA

    RFAmplifierOrOscillator

  • Maximum frequency at full input rating

    20 MHz

Capacitance

  • Grid-to-plate capacitance

    7 pF

  • Grid-to-filament capacitance

    6 pF

  • Plate-to-filament capacitance

    1 pF