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HK154

Gammatron low-mu power triode with tantalum plate and grid for Class C RF and audio power or modulator service. Rated for approximately 50 W plate dissipation and 1.5 kV plate voltage, favoring high-current output stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: GIANT2
Base pins: 4
Nominal heater: 5 V / 6.5 A

Description

Gammatron power triode with tantalum plate and grid, intended for radio-frequency Class C service and audio power-amplifier/modulator applications. The source describes Gammatron construction using tantalum electrode structures and a thoriated-tungsten filament where applicable.

Socket description

Giant 2-contact transmitting-tube base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: GIANT2
Base pins: 4
Nominal heater voltage: 5 V
Nominal heater current: 6.5 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

Plate resistance: 1750 Ω
Amplification factor: 6.7
Max plate voltage: 1500 V
Max plate dissipation: 50 W
Max cathode current: 175 mA

Published maximum ratings and characteristics promoted from the datasheet; typical application values remain parameter rows.

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

1944 Heintz and Kaufman

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Filament Voltage
5 V
Filament Current
6.5 A
Amplification Factor
6.7
Plate Resistance
1750 ohm
Grid-Plate Capacitance
5.9 pF
InterelectrodeCapacitance
Grid-Filament Capacitance
4.3 pF
InterelectrodeCapacitance
Plate-Filament Capacitance
1.1 pF
InterelectrodeCapacitance

Other

Normal Plate Dissipation
50 W
Maximum Plate Voltage
1500 V
Maximum Average Plate Current
175 mA
Maximum Average Grid Current
30 mA
RF Class C CW Maximum Plate Voltage
1500 V
ClassC;Telegraphy
RF Class C Plate-Modulated Maximum Plate Supply Voltage
1250 V
ClassC;Telephony
Recommended Audio Class A Plate Voltage Range
500-1250 V
ClassA;AudioAmplifier