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

PEN26

Power/output pentode designed for audio-frequency output amplification in receiver or push-pull amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
24 V / 200 mA

Description

Series-heater output pentode for DC/AC receivers and audio power service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
24 V
Nominal heater current
200 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
50000 Ω
Transconductance
0.0031 S
Max plate voltage
200 V
Max screen voltage
100 V
Max plate dissipation
8 W
Max screen dissipation
1 W
Max cathode current
70 mA

Published Mullard ratings, characteristics, capacitances, and operating data promoted where applicable; additional values retained as parameters.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Normal plate voltage

    200 V

    ClassA

  • Normal screen voltage

    100 V

    ClassA

  • Plate current

    40 mA

    ClassA

  • Screen current

    5 mA

    ClassA

  • Control-grid voltage

    -19 V

    ClassA

  • Optimum load

    5000 ohm

    ClassA

  • Audio output at 10% distortion

    3 W

    ClassA

  • Input signal RMS

    8.8 V

    ClassA

  • Cathode-bias resistance

    420 ohm

    ClassA

  • Grid resistance maximum self-bias

    1 Mohm

  • Heater-cathode resistance maximum

    5000 ohm

  • Heater-cathode voltage maximum

    175 V