U43

Marconi miniature high-voltage vacuum rectifier explicitly intended for CRT RF- or flyback-derived high-voltage supplies, qualifying as a television boost/EHT rectifier.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 90 mA

Description

The Marconi U43 is a miniature high-voltage vacuum rectifier for crt rf or flyback-derived ht supplies.

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: 6.3 V
Nominal heater current: 90 mA
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

Rectifier peak inverse voltage: 17000 V
Rectifier nominal output current: 30 mA
Rectifier peak forward current: 80 mA

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater/filament voltage
6.3 V
Heater/filament current
90 mA
Peak inverse voltage
17000 V
Nominal/maximum output current
30 mA
Peak anode current
80 mA
Maximum sinusoidal-input output current
0.5 mA
10-500kHz

Construction

Rectifier topology
Half-wave