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V2018

Indirectly heated half-wave rectifier for universal AC/DC receivers. Delayed emission reduces warm-up overvoltage stress in transformerless power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B4
Base pins: -
Nominal heater: 20 V / 180 mA

Description

Indirectly heated half-wave rectifier developed for universal AC/DC receivers, with delayed emission that reduces warm-up overvoltage stress in the receiver power supply.

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: -
Nominal heater voltage: 20 V
Nominal heater current: 180 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: 250 V
Rectifier nominal output current: 60 mA

Published ratings and characteristics promoted where clearly stated; repeated identical sections compressed where applicable.

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

195X Tunsgram

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

Heater or filament voltage
20 V
Published nominal value
Heater or filament current
180 mA
Published nominal value

Other

Rectified output current
60 mA
Published rectifier current