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Voltage Pentode - Remote Cutoff (single) ·Pentode

MVSPEN

Cossor pentode for mains-powered receiver signal amplification, conservatively classified where the source does not establish a narrower role.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B7
Base pins
7
Nominal heater
4 V / -

Description

MVSPEN: Cossor pentode valve. The complete Cossor sheet was read for construction, technical data, operating recommendations, and application notes.

Socket description

Medium 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B7
Base pins
7
Nominal heater voltage
4 V
Nominal heater current
-
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

Pentode

X-ray radiationInterelectrode capacitances
Max plate voltage
200 V

Published ratings/characteristics promoted from the approved datasheet.

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

1936 Cossor Valve Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Heater/filament voltage

    4 V

  • Control characteristic

    Variable-mu

  • Intended service

    High-frequency amplifier

Other

  • Maximum anode voltage

    200 V

Data set 02

193X Cossor

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Maximum Anode Voltage

    200 V

    Published technical-data value

Characteristics

  • Mutual Conductance

    200000 µS

    Published technical-data value