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KT32

Output power tetrode designed for receiver audio stages, providing efficient Class-A or Class-AB power amplification from typical receiving-equipment supply voltages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 26 V / 300 mA

Description

Aligned-grid output tetrode for AC/DC 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: 26 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

1 physical section, each with unique specifications.

Section 1

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 135 V
Max screen voltage: 135 V

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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater/Filament Voltage
26 V
Heater/Filament Current
300 mA

Other

Maximum/Published Anode Voltage
135 V
Maximum/Published Screen Voltage
135 V
Maximum Published Power Output
7.5 W
Two-valve service where applicable
Single-Valve Output
3.5 W
135 V plate/screen
Push-Pull Output
7.5 W
135 V

Capacitance

Grid-Anode Capacitance
1.4 pF
Anode-Cathode Capacitance
12 pF
Grid-Cathode Capacitance
21 pF