OV21

Russian backward-wave microwave tube; Application in measuring equipment.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 2 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 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.

Backward-wave microwave tube. Cathode Type: Impregnated, Indirect Heating; Output Type: Waveguide; Envelope: Metal-Ceramic, With Permanent Magnet; Mass: 12.7kg; Cooling Method: Forced Water; Frequency Range: 1.6cm; Frequency Range Minimum: 1.5cm; Frequency Range Maximum: 1.66cm; Power Irregularity In Frequency Band, Db: 14; Output Power: 0.5mW; Filament Voltage, V: 6.3; Filament Current, A: 2; Slow-Wave Circuit Voltage, V: 2250; Slow-Wave Circuit Voltage, V Minimum: 1500; Slow-Wave Circuit Voltage, V Maximum: 3000

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 Backward Wave

Published operating points and test conditions from this source.

SECTION 1

TravelingWave

Other

OutputPower
0.5 mW
RF output power
Wavelength
1.6 cm
Nominal wavelength
SlowWaveStructureVoltage
2250 V
Slow-wave circuit voltage