HF201A

Radiation-cooled Amperex power triode especially designed for audio- and radio-frequency amplifier and oscillator service. Rated for approximately 200 W plate dissipation, with published RF output around 300 W through about 30 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10.5 V / 4 A

Description

HF201A is a Triode device in the supplied Amperex literature. Radiation-cooled triode especially designed for AF and RF amplifier and oscillator 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: 10.5 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

Amplification factor: 18
Max plate voltage: 2500 V
Max plate dissipation: 200 W
Max cathode current: 200 mA

Electrical values extracted from the supplied source table; operating-condition values are preserved in TUBE_SECTION_PARAMETER.

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

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
18
Grid-to-plate capacitance
7 pF
Grid-to-filament capacitance
8.8 pF
Plate-to-filament capacitance
1.2 pF

Other

Maximum plate dissipation
200 W
Plate voltage
2500 V
RF ClassC
Plate current
200 mA
RF ClassC
Power output
380 W
RF ClassC
Grid voltage
-300 V
RF ClassC
Grid current
18 mA
RF ClassC
Maximum frequency
30 MHz

Data set 02

1963 Amperex Condensed

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
2000 V
RFAmplifierOrOscillator
Plate current
200 mA
RFAmplifierOrOscillator
RF output power
300 W
RFAmplifierOrOscillator
Grid voltage
-250 V
RFAmplifierOrOscillator
Grid current
23 mA
RFAmplifierOrOscillator
Maximum frequency at full input rating
30 MHz

Capacitance

Grid-to-plate capacitance
7 pF
Grid-to-filament capacitance
8.8 pF
Plate-to-filament capacitance
1.9 pF