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Voltage Tetrode ·Tetrode

MS4B

OSRAM receiving tetrode documented for amplification, detection, and related receiver service; available source labeling is internally inconsistent about electrode terminology.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5
Base pins
5
Nominal heater
4 V / 1 A

Description

OSRAM MS4B triode for amplification, detection, or power-output service as specified in the supplied datasheet.

Socket description

European 5-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B5
Base pins
5
Nominal heater voltage
4 V
Nominal heater current
1 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

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances
Plate resistance
350000 Ω
Transconductance
0.0032 S
Amplification factor
1120
Max plate voltage
250 V
Max screen voltage
30 V

Published characteristics/ratings were promoted when unambiguous; remaining operating values are preserved in TUBE_SECTION_PARAMETER.

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

192X Marconi Valve

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Published operating data

    See source

    Operating curves/table are present on the approved one-page source; values not promoted unless unambiguous in searchable text.

Data set 02

193X Osram

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

  • Heater/Filament Voltage

    4 V

    Published datasheet value

  • Heater/Filament Current

    1 A

    Published datasheet value

  • Maximum Anode Voltage

    250 V

    Published datasheet value

  • Maximum Screen Voltage

    30 V

    Published datasheet value

Characteristics

  • Plate Resistance

    350000 ohm

    Published datasheet value

  • Mutual Conductance

    3200 µS

    Published datasheet value

  • Amplification Factor

    1120

    Published datasheet value