R42

Ferranti indirectly heated high-vacuum full-wave rectifier with cathode internally connected to one heater side, intended for conventional electronic power-supply rectification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 4 V / 2.5 A

Description

Indirectly heated high-vacuum full-wave rectifier with cathode internally tied to one heater side.

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: 4 V
Nominal heater current: 2.5 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

Rectifier peak inverse voltage: 1400 V
Rectifier peak forward current: 375 mA

Two rectifier anodes used for full-wave service; represented once under identical-section compression.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier peak inverse voltage: 1400 V
Rectifier peak forward current: 375 mA

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

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

RMS anode voltage maximum
500 V

Application

Application
Full-wave power rectifier