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Power - Tetrode (NOT beam) ·Tetrode

KT33C

Output tetrode designed for Class-A or push-pull Class-AB audio-frequency power amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: IO
Base pins: 8
Nominal heater: 13 V / 600 mA

Description

Indirectly heated output tetrode for Class-A and push-pull Class-AB 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: 13 V
Nominal heater current: 600 mA
Parallel heater voltage: 13 V
Parallel heater current: 600 mA
Series capable: Yes

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

Transconductance: 0.01 S
Max plate voltage: 200 V
Max screen voltage: 200 V
Max plate dissipation: 13 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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater/Filament Voltage
13 V
Heater/Filament Current
600 mA
Transconductance
10000 uS

Other

Maximum/Published Anode Voltage
200 V
Maximum/Published Screen Voltage
200 V
Maximum Anode Dissipation
13 W
Maximum Published Power Output
15 W
Two-valve service where applicable
Single-Valve Output
5 W
200 V tetrode connection
Push-Pull Class AB Output
15 W
Two valves

Capacitance

Grid-Anode Capacitance
1.2 pF
Anode-Cathode Capacitance
12 pF
Grid-Cathode Capacitance
19 pF