IW4350

Mullard indirectly heated full-wave power rectifier for receiver and amplifier supplies. Its four-volt heater supports moderate DC output in conventional mains-operated equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B4
Base pins: -
Nominal heater: 4 V / 2 A

Description

Indirectly heated full-wave power rectifier for outputs up to 350 V at 120 mA.

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: 4 V
Nominal heater current: 2 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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Max cathode current: 120 mA
Rectifier nominal output current: 120 mA
Rectifier warm-up time: 35 s

Indirectly heated full-wave rectifier; RMS anode voltage and heating time retained.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 120 mA
Rectifier warm-up time: 35 s

Second physical Rectifier section added for documented full-wave construction.

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

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

RMS anode voltage
350 V
PerAnode;2x350V
Reservoir capacitance maximum
12 uF

Characteristics

Heating time
35 s