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XD49W

Water-cooled directly heated high-vacuum diode for high-voltage rectifier and clipper service. Rated for approximately 50 kV peak inverse voltage and 15 A peak-current capability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 15 V / 36 A

Description

The XD49W is a water-cooled high-vacuum diode for rectifier and clipper 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: 36 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

Rectifier

X-ray radiationInterelectrode capacitances

Max plate dissipation: 5000 W
Rectifier peak inverse voltage: 50000 V
Rectifier peak forward current: 15 A

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

1960 Central Electronic Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage
50000 V
Peak anode current
15 A
Anode dissipation
5000 W
Filament starting surge current
80 A

Characteristic

Filament voltage
15 V
Filament current
36 A
Filament cold resistance
0.042 ohm

Construction

Cooling method
Water