4CX800A

Svetlana 800 W transmitting tetrode for high-gain grid-driven or grounded-grid RF linear-amplifier service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 12.6 V / 3.6 A

Description

The Svetlana 4CX800A is a high- performance ceramic metal tetrode with a plate dissipation rating of 800 watts with forced air cooling. The performance character- istics of the 4CX800A allow its use aas a high gain grid-driven RF amplifier or in grounded grid service. A recommended mode of operation is in grid-driven service with a passive (resistive) 50 ohm untuned input circuit. This eliminates the need for multiple input tuned circuits and neutralization. In this mode, an exceptionally simple, stable, low- cost amplifier with good intermodulation performance can be designed. As a linear power amplifier, the 4CX800A will conservatively produce 750 watts PEP SSB, and 750 watts Key Down CW in any of the three modes: grid-driven, grid-driven passive input, and cathode-driven. Because of the high performance

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: 12.6 V
Nominal heater current: 3.6 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: 2500 V
Max screen voltage: 350 V
Max plate dissipation: 800 W
Max screen dissipation: 15 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
12.6 V
Nominal
HeaterCurrentNominal
3.6 A
Nominal
Maximum Plate Voltage
2500 V
Maximum Screen Voltage
350 V
Maximum Plate Dissipation
800 W
Maximum Screen Dissipation
15 W