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Hexode ·Hexode

E449

Variable-mu hexode documented with receiving-tube operating characteristics; available source does not establish a narrower functional application.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B5
Base pins
-
Nominal heater
4 V / 1.2 A

Description

E449 is listed in the supplied valve table as a variable-mu hexode. Published operating and characteristic values were transcribed from its target row.

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
-
Nominal heater voltage
4 V
Nominal heater current
1.2 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

1 physical section, each with unique specifications.

Section 1

Hexode

X-ray radiationInterelectrode capacitances
Plate resistance
450000 Ω
Transconductance
0.002 S
Max plate voltage
200 V
Max screen voltage
80 V

Published target-row operating and characteristic values reviewed.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Hexode

Other

  • Plate voltage

    200 V

    Published European table row

  • Screen voltage

    80 V

    Published European table row

  • Plate current

    3 mA

    Published European table row

  • Control-grid bias

    2 V

    Published European table row

Characteristic

  • Plate resistance

    450000 ohm

    Published European table row

  • Heater/filament voltage

    4 V

    Published European table row

  • Heater/filament current

    1.2 A

    Published European table row

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Hexode

Characteristics

  • Internal resistance

    50 M.Ohm

    Published datasheet value