TH558

Hyper-Vapotron very-high-power ceramic-metal transmitting tetrode with approximately 500 kW anode-dissipation capability. Intended for exceptionally high-power transmitter service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 23 V / 520 A

Description

Hyper-Vapotron very-high-power ceramic-metal transmitting tetrode with 500 kW anode-dissipation capability.

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: 23 V
Nominal heater current: 520 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

Tetrode

X-ray radiationInterelectrode capacitances

Transconductance: 0.4 S
Amplification factor: 4.5
Max plate voltage: 13000 V
Max screen voltage: 1250 V
Max plate dissipation: 500000 W
Max screen dissipation: 8000 W
Max grid dissipation: 3000 W
Max cathode current: 600 A

Promoted maximum ratings/characteristics mapped semantically from the printed ratings tables; additional published electrical data 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

1972 Thomson CSF

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Filament Starting Current Maximum
1500 A
Grid1-Cathode Capacitance
430 pF
Anode-Cathode Capacitance
1 pF
Grid2-Anode Capacitance
105 pF
Grid1-Grid2 Capacitance
730 pF
Frequency Maximum
10 MHz
Typical Anode Voltage
12000 V
Typical Anode Current
54 A
Anode Cooling Water Flow Minimum
180 L/min