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HK24G

VHF-specialized derivative of the HK24 Gammatron power triode for continuous high-frequency operation. Retaining approximately 2 kV plate capability and 25 W dissipation, its construction permits useful continuous service through roughly 300 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: GIANT3
Base pins: 4
Nominal heater: 6.3 V / 3 A

Description

Very-high-frequency triode derivative of the HK-24, with published continuous-operation UHF performance through 300 megacycles. The source describes Gammatron construction using tantalum electrode structures and a thoriated-tungsten filament where applicable.

Socket description

Giant 3-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: GIANT3
Base pins: 4
Nominal heater voltage: 6.3 V
Nominal heater current: 3 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: 25
Max plate voltage: 2000 V
Max plate dissipation: 25 W
Max cathode current: 75 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
6.3 V
Filament Current
3 A
Amplification Factor
25
Grid-Plate Capacitance
0.0156 pF
InterelectrodeCapacitance
Grid-Filament Capacitance
1.8 pF
InterelectrodeCapacitance
Plate-Filament Capacitance
0.2 pF
InterelectrodeCapacitance

Other

Normal Plate Dissipation
25 W
Maximum Plate Voltage
2000 V
Maximum Average Plate Current
75 mA
Maximum Grid Bias
-500 V
Maximum DC Plate Input
112 W
RFPA Class C Unmodulated Plate Input at 60/100/150/200/250/300 mc
112;88;80;70;61;54 W
ClassC;Unmodulated;Frequency=60/100/150/200/250/300Mc
RFPA Class C Plate-Modulated Plate Input at 60/100/150/200/250/300 mc
75;59;53;47;41;36 W
ClassC;PlateModulated;Frequency=60/100/150/200/250/300Mc