4CX20000C

High-performance ceramic-metal power tetrode for audio and RF applications, especially VHF FM broadcast transmitters in the 88–108 MHz band.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 140 A

Description

The Svetlana™ 4CX20,000C is a high-performance ceramic/metal power tetrode designed for audio and radio frequency applications. It is particu- larly well-suited for use in VHF FM broadcast transmitters in the Band II 88-108 MHz frequency range. The Svetlana 4CX20,000C has a directly-heated thoriated tungsten mesh filament for mechanical ruggedness and good VHF electri- cal performance. The Svetlana 4CX20,000C is manufactured in the Svetlana factory in St. Peters- burg, Russia, and is a direct replacement for the 4CX20,000C manufactured in the United States.

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: 10 V
Nominal heater current: 140 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

Tetrode

X-ray radiationInterelectrode capacitances

Max plate voltage: 12500 V
Max screen voltage: 2000 V
Max plate dissipation: 20000 W
Max screen dissipation: 450 W
Max grid dissipation: 200 W

Maximum ratings promoted from 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

199X Svetlana

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

HeaterVoltageNominal
10 V
Nominal
HeaterCurrentNominal
140 A
Nominal
Maximum Plate Voltage
12500 V
Maximum Screen Voltage
2000 V
Maximum Plate Dissipation
20000 W
Maximum Screen Dissipation
450 W