8547

Water-cooled general-purpose high-power triode for industrial heating, audio power, and pulse service. Rated for roughly 175 kW plate dissipation and 17 kV plate voltage, with pulse cathode current approaching 19 A.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 14.5 V / 450 A

Description

The Machlett ML-8547 is a water-cooled general-purpose high-power triode for industrial heating, audio power and pulse service.

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: 14.5 V
Nominal heater current: 450 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: 17000 V
Max plate dissipation: 175000 W
Max grid dissipation: 2500 W
Max cathode current: 18.6 A

Maximum ratings promoted from the printed pulse/CW service tables. X-ray flag follows the explicit source warning.

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

1971 Machlette Laboratories

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

Amplification factor
14

Other

Maximum DC/peak plate voltage
17000 V
Maximum plate dissipation
175000 W
Maximum grid dissipation
2500 W
Maximum pulse cathode current
18.6 A