TH56

Ceramic-metal industrial power triode for Class C high-power oscillator service. Rugged low-inductance construction, approximately 4 kW plate dissipation, and 6 kV capability suit industrial dielectric-heating RF generators.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / 51.5 A

Description

High-performance ceramic/metal industrial power triode for Class C high-power oscillator service, using a rugged low-inductance mesh filament.

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: 7.5 V
Nominal heater current: 51.5 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

Amplification factor: 22
Max plate voltage: 6000 V
Max plate dissipation: 4000 W
Max grid dissipation: 150 W
Max cathode current: 2.5 A

Section values promoted from published characteristics and maximum ratings.

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

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Voltage (AC or DC) 7.50 ±
0.37 V
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Current
51.5 A
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Maximum frequency
110 MHz
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Input
35 pF
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Output
0.9 pF
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Feedback
20 pF
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Other

DC plate voltage
6000 V
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Maximum-signal DC plate current
2.5 A
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Plate Dissipation
4000 W
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Grid Dissipation
150 W
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DC grid voltage
-1000 V
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Typical Operation, Class C (Frequencies to
30 MHz
TypicalOperation
DC plate voltage 4,000 5,000
6000 V
TypicalOperation
DC grid voltage -300 -450
-500 V
TypicalOperation
Peak grid voltage 580 750
765 V
TypicalOperation
Plate current 2,500 2,500
2.08 A
TypicalOperation
DC grid current -245 -265
-80 mA
TypicalOperation
Grid dissipation 68 78
46 W
TypicalOperation
Power output 7,500 10,000
10000 W
TypicalOperation
Plate dissipation 2,500 2,500
2500 W
TypicalOperation