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Power - Triode ·Triode

P26500

Tungsram low-mu oxide-filament audio power triode for high-output amplification. Its low plate resistance and 28 W dissipation favor high-current transformer-coupled output stages.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 2 A

Description

Oxide-filament power triode for high-output audio-frequency amplification.

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
4 V
Nominal heater current
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

Triode

X-ray radiationInterelectrode capacitances
Plate resistance
760 Ω
Transconductance
0.0042 S
Amplification factor
3.2
Max plate voltage
500 V
Max plate dissipation
28 W

Published ratings and characteristics promoted from the approved source.

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

195X Tunsgram

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • HeaterVoltageNominal

    4 V

    Nominal

  • HeaterCurrentNominal

    2 A

    Nominal

  • Maximum Plate Voltage

    500 V

  • Maximum Plate Dissipation

    28 W

Characteristic

  • Transconductance

    4200 µS

    Typical

  • Amplification Factor

    3.2

    Typical

  • Plate Resistance

    760 ohm

    Typical