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4KM50SJ

Four-cavity power-amplifier klystron for 1.7–2.4 GHz tropospheric-scatter communications, delivering at least 12 kW output with high gain.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 7.5 V / -

Description

The 4KM50S] is a four-cavity, power amplifier klystron intended primarily for use in tropospheric scatter communications systems. When tuned for maximum efficiency, it produces a minimum output power of 12 kilowatts, at frequencies from 1.7 to 2.4 gigacycles, with a minimum gain of 40 decibels.

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: 7.5 V
Nominal heater current: -
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

Klystron

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Single electrical section; values mapped from printed ratings/characteristics. Klystron represented as SectionType Other because the canonical section vocabulary has no Klystron section type.

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

1962 Eimac

Published operating points and test conditions from this source.

SECTION 1

Klystron

Other

The
0 a
The 4KM50S] is a four-cavity, power amplifier klystron intended
The
0 a
The 4KM50S] incorporates a built-in vacuum pump in the form of a
Heater: Voltage (x
7.5 volts
Heater: Voltage (x5%) 7.5 volts
Current
12 amperes
Current - - - - - - - - - 4 - < s 12 amperes
Getter: Voltage
4 volts
Getter: Voltage - 4 volts ac
Amperes
24 Amperes
Amperes - 24 amperes ac
Output Power
12 kilowatts
Output Power - - 12 kilowatts
Frequency Range
2.4 gigacycles
Frequency Range 1.7-2.4 gigacycles
Phase sensitivity to beam voltage
0.058 volt
Phase sensitivity to beam voltage - - - - - - - - - 0.058 degrees/volt
Current
15 amperes
Current - - - - - - - 4 - - 15 amperes
BEAM CURRENT (dc) S
3 AMPERES
BEAM CURRENT (dc) S 3 AMPERES
Frequency
2.4 gigacycles
Frequency - - - - - - - - 17 2.4 1.7 2.4 gigacycles
Output Power
10.5 kilowatts
Output Power - - - - - - - 145 12.3 12.1 10.5 kilowatts
Driving Power
1 watt
Driving Power - - - - - - - 1 1 1 1 watt
Beam Current
1.8 amperes
Beam Current - - - - - - 18 1.8 1.8 1.8 amperes dc
Half Power Bandwidth - - - - - b
12 megacycles
Half Power Bandwidth - - - - - b 8 10 12 megacycles
Electromagnet Current
12.5 amperes
Electromagnet Current - - - - - 125 12.5 12.5 12.5 amperes
SECTION A-A
1 A
SECTION A-A 1.000
uG
3 a
uG43s a/u_ (REE)