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Power - Pentode Single (NOT beam) (under 10W) ·Pentode

E443H

Power/output pentode designed for audio-frequency power amplification in single-ended or push-pull output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B4
Base pins
4
Nominal heater
4 V / 1.1 A

Description

E443H is a Pentode device in the supplied Philips literature. Philips directly heated power pentode.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
B4
Base pins
4
Nominal heater voltage
4 V
Nominal heater current
1.1 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
13000 Ω
Transconductance
0.0028 S
Amplification factor
120
Max plate voltage
250 V
Max screen voltage
250 V
Max plate dissipation
9 W

Philips directly heated power pentode.

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

Pentode

Other

  • Plate voltage

    250 V

    ClassA

  • Plate current

    36 mA

    ClassA

  • Grid bias

    -15 V

    ClassA

  • Screen voltage

    250 V

    ClassA

  • Optimum load resistance

    7000 ohm

    ClassA

  • Power output

    3.1 W

    ClassA

  • Distortion

    9.7 %

    AtRatedOutput

  • Maximum anode dissipation

    9 W

Characteristic

  • Transconductance

    2.8 mA/V

    ClassA

  • Amplification factor

    120

    ClassA

  • Internal resistance

    13000 ohm

    ClassA

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Normal plate current

    36 mA

  • Grid bias

    -14 V

Characteristic

  • Maximum transconductance

    3500 µS