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Voltage Dual Pentode ·Pentode-Pentode

KLL32

Battery-operated double output pentode designed for push-pull audio power amplification, combining two directly heated power sections in one envelope.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
2
Base
-
Socket code
IO
Base pins
8
Nominal heater
2 V / 300 mA

Description

Battery double output pentode intended for push-pull audio power service.

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
2 V
Nominal heater current
300 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

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0026 S

Representative of two identical output-pentode sections.

Section 2

Pentode

X-ray radiationInterelectrode capacitances
Transconductance
0.0026 S

Second identical physical output-pentode section; added to align rows with SectionCount.

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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

  • HeaterOrFilamentVoltage

    2 V

  • HeaterOrFilamentCurrent

    220 mA

Other

  • Power Output

    1.2 W

    PushPull;PlateVoltage=135V

Data set 02

1958 Mullard Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate Voltage

    135 V

    PushPull; TwoTubes

  • Screen Voltage

    135 V

    PushPull; TwoTubes

  • Power Output

    1.2 W

    PushPull; TwoTubes

  • Plate-to-Plate Load Resistance

    16000 ohm

    PushPull; TwoTubes