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U329

Marconi high-voltage booster diode for television flyback energy recovery, providing approximately 7 kV inverse-voltage capability and 120 mA rectified current.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 25 V / 300 mA

Description

The Marconi U329 is a high-voltage indirectly heated booster diode for television flyback 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: 25 V
Nominal heater current: 300 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: 7000 V
Rectifier nominal output current: 120 mA
Rectifier peak forward current: 720 mA
Rectifier max heater-cathode voltage: 2000 V

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
25 V
Heater/filament current
300 mA
Peak inverse voltage
7000 V
Nominal/maximum output current
120 mA
Peak anode current
720 mA
Maximum heater-cathode voltage
2000 V
Surge anode current
2.4 A

Construction

Rectifier topology
Half-wave