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Power - Triode (over 1000V 100W) ·Triode

8618V

Magnetically beamed water-cooled high-power triode designed for continuous-wave and pulse service in substantial RF power systems.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
15 V / 350 A

Description

The Machlett ML-8618V is a magnetically beamed water-cooled high-power triode for cw 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
15 V
Nominal heater current
350 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
20
Max plate voltage
17000 V
Max plate dissipation
80000 W
Max grid dissipation
500 W
Max cathode current
200 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

    20

Other

  • Maximum DC/peak plate voltage

    17000 V

  • Maximum plate dissipation

    80000 W

  • Maximum grid dissipation

    500 W

  • Maximum pulse cathode current

    200 A