5C4M

Russian miniature indirectly heated double-kenotron for full-wave power-frequency rectification, using two rectifier sections to provide approximately 130 mA nominal DC output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: -
Nominal heater: 5 V / 2 A

Description

The 5C4M is a glass miniature double-kenotron with an indirectly heated cathode for power-frequency rectification.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: -
Nominal heater voltage: 5 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

Rectifier nominal output current: 130 mA
Rectifier peak forward current: 1 A

REDO promoted fields populated from published specification/maximum-rating tables where applicable.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Second physical rectifier section added for documented double-kenotron 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

195X Russian

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

First-diode emission current
300 mA
Minimum
Second-diode emission current
300 mA
Minimum
Rectified current
133 mA
Minimum

Other

Maximum plate current
415 mA
Peak/amplitude
Maximum rectified current
130 mA
Published limit
Peak plate current
1 A
Published limit
Maximum average plate current
70 mA
Published limit