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HF140

Radiation-cooled Amperex transmitting power triode for RF amplifier, oscillator, audio power-amplifier, and modulator service. Electrically similar to the HF120, with approximately 100 W plate dissipation and low-medium gain.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 4
Nominal heater: 10 V / 3.25 A

Description

The Amperex HF140 is a radiation-cooled transmitting triode intended for RF power amplifier/oscillator and AF power amplifier/modulator service.

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: 10 V
Nominal heater current: 3.25 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: 0.0045 S
Amplification factor: 12
Max plate voltage: 1250 V
Max plate dissipation: 100 W

Radiation-cooled transmitting triode; replacement-only type.

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

Other

Heater/Filament Voltage
10 V
Published datasheet value
Heater/Filament Current
3.25 A
Published datasheet value
Maximum Plate/Anode Voltage
1250 V
Published datasheet value
Maximum Plate/Anode Dissipation
100 W
Published datasheet value

Characteristic

Transconductance
4500 µS
Published datasheet value
Amplification Factor
12
Published datasheet value