U45

Marconi indirectly heated high-voltage half-wave rectifier explicitly intended for CRT RF- and 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 / 120 mA

Description

The Marconi U45 is a high-voltage indirectly heated half-wave rectifier for crt rf and flyback 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: 120 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: 20000 V
Rectifier nominal output current: 3 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
120 mA
Peak inverse voltage
20000 V
Nominal/maximum output current
3 mA
Peak anode current
80 mA
Maximum sinusoidal-input output current
0.5 mA
10-500kHz

Construction

Rectifier topology
Half-wave