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DVSG

Cossor screen-grid tetrode for receiver amplification. Its screened construction reduces control-grid-to-anode coupling and improves high-frequency stability.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B5
Base pins: 5
Nominal heater: 16 V / 250 mA

Description

DVSG: Cossor screen-grid tetrode. The complete Cossor sheet was read for construction, technical data, operating recommendations, and application notes.

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: 16 V
Nominal heater current: 250 mA
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

Transconductance: 0.0028 S
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

Tetrode

Characteristics

Heater/filament voltage
16 V
Heater/filament current
250 mA
Mutual conductance
2800 uS
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

Tetrode

Characteristics

Mutual Conductance
2800 µS
Published technical-data value