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Tube Tinker — Electron Tube Database
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Power - Beam (NOT sweep) ·BeamPower

PEN44

Beam-power output valve intended for audio-frequency amplification in receiving equipment, providing loudspeaker-driving power from conventional receiver supply voltages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
8
Nominal heater
4 V / 2.1 A

Description

High-power indirectly heated beam-power amplifier for AC-mains receiver output stages.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
8
Nominal heater voltage
4 V
Nominal heater current
2.1 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

Beam Power

X-ray radiationInterelectrode capacitances
Max plate voltage
275 V
Max screen voltage
275 V
Max plate dissipation
18 W

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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

  • Typical Plate Voltage

    260 V

  • Typical Screen Voltage

    270 V

  • Typical Plate Current

    70 mA

Capacitance

  • Anode Earth Capacitance

    11 pF

  • Grid Earth Capacitance

    24 pF

  • Anode Grid Capacitance

    0.9 pF