4CX35000C

Special 4CX35000 variant designed particularly for plate-and-screen-modulated Class-C RF amplification at very high power, with full transmitting ratings extending to about 110 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 10 V / 300 A

Description

Forced-air-cooled coaxial metal-ceramic RF power tetrode for high-power amplifier service.

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: 300 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

Amplification factor: 5.5
Max plate voltage: 20000 V
Max screen voltage: 2500 V
Max plate dissipation: 35000 W
Max screen dissipation: 1750 W
Max grid dissipation: 500 W
Max cathode current: 16 A

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

1965 Eimac Tube Manual

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Heater/Filament Voltage
10 V
Heater/Filament Current
300 A
Amplification Factor
5.5

Other

Maximum DC Plate Voltage
10000 V
Maximum DC Screen Voltage
2500 V
Maximum Plate/Cathode Current
10 A
Maximum Plate Dissipation
35000 W
Maximum Screen Dissipation
1500 W
Maximum Grid Dissipation
450 W
Frequency for Maximum Ratings
110 MHz
Typical Plate Output Power
55.6 W

Construction

Cooling
Forced air

Data set 02

1971 English Electric Valve

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Other

Filament voltage
10 V
Filament current
300 A
Frequency for full ratings
30 MHz
Output power, class C telegraphy
82.5 kW