HK354C

Power transmitting triode intended for RF amplification, oscillation, or related professional service. Manufacturer documentation emphasizes radio-frequency operation, substantial plate loading, and transmitter or industrial applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: GIANT2
Base pins: 4
Nominal heater: 5 V / 10 A

Description

Low-mu C version of the 354 Gammatron, a 150-watt radiation-cooled general-purpose triode with high-frequency performance and high-voltage capability. 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: 10 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: 14
Max plate voltage: 4000 V
Max plate dissipation: 150 W
Max cathode current: 300 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
10 A
Amplification Factor
14
Grid-Plate Capacitance
3.3 pF
InterelectrodeCapacitance
Grid-Filament Capacitance
4.4 pF
InterelectrodeCapacitance
Plate-Filament Capacitance
0.7 pF
InterelectrodeCapacitance

Other

Normal Plate Dissipation
150 W
Maximum Plate Voltage
4000 V
Maximum Average Plate Current
300 mA
Maximum Plate Input
750 W
Maximum DC Grid Current
60 mA
RF Class C Unmodulated Maximum Plate Voltage
4000 V
ClassC;Unmodulated
Typical RF Plate Voltage
4000;3000;2000 V
ClassC;Unmodulated