U17

Directly heated high-voltage half-wave rectifier designed to supply cathode-ray-tube and associated circuits. Its single rectifying section provides modest current at elevated voltage.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4
Base pins: 4
Nominal heater: 4 V / 1 A

Description

A directly heated high-voltage half-wave rectifier capable of supplying cathode-ray-tube and associated circuits.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B4
Base pins: 4
Nominal heater voltage: 4 V
Nominal heater current: 1 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 voltage: 2500 V
Rectifier nominal output current: 30 mA

Published ratings and characteristics promoted from the approved datasheet.

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

1937 Osram Valves

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater Voltage
4 V
Published datasheet value
Heater Current
1 A
Published datasheet value
Anode Voltage RMS
2500 V
Published datasheet value
Rectified DC Current
30 mA
Published datasheet value

Data set 02

193X Osram

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

Anode RMS voltage
2500 V
Published datasheet value