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Specialized - Traveling Wave ·TravelingWave

UV257

Russian traveling-wave tube; Uhf power amplification.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 2.4 A

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
6.3 V
Nominal heater current
2.4 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

TravelingWave

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Application: Uhf power amplification. Cathode type: Oxide, indirect heating; Output type: Waveguide; Envelope: Glass; Mass: 300g; Cooling method: Natural; Frequency range: 3650 MHz; Frequency range Minimum: 3400 MHz; Frequency range Maximum: 3900 MHz; Output power: 15W; Gain: 30dB; Filament voltage, v: 6.3; Filament current, a: 2.4; Filament current, a Minimum: 2.1; Filament current, a Maximum: 2.6; First anode voltage, v: 900; First anode voltage, v Minimum: 700; First anode voltage, v Maximum: 1100; Slow-wave circuit voltage, v: 2550; Slow-wave circuit voltage, v Minimum: 2300; Slow-wave circuit voltage, v Maximum: 2800; Collector voltage, v: 2300; Collector voltage, v Minimum: 1800; Collector voltage, v Maximum: 2800; External loading agreement coefficient: 1.5; Noise coefficient: 30dB

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

2026 Russian Traveling Wave

Published operating points and test conditions from this source.

SECTION 1

TravelingWave

Other

  • FrequencyRange

    3400 to 3900 MHz

    frequency range

  • SlowWaveStructureVoltage

    2300 to 2800 V

    slow-wave circuit voltage, v

  • FirstAnodeVoltage

    700 to 1100 V

    first anode voltage, v

  • OutputPower

    15 W

    output power

  • Gain

    30 dB

    gain