B1-PrK

B1-PrK transceiver unit in the Prima-KV radio station

The B1-PrK is the main airborne transceiver unit of the Prima-KV HF radio station. It is responsible for long-range radio communication in the shortwave / decameter band and works as the central radio block of the system. In aircraft installation, this unit handles both reception and transmission, while the control panel, antenna matching unit, mounting frame and aircraft wiring complete the full radio station set. The block is used where the crew needs stable communication beyond the normal VHF line-of-sight range.

Long-range communication through B1-PrK

The main purpose of the B1-PrK is to provide long-distance voice and data communication from the aircraft. HF radio remains relevant where VHF coverage is limited, where the aircraft operates over remote areas, and where communication with ground stations must be maintained over extended distances. In the Prima-KV system, the transceiver operates across the HF frequency range and supports several emission classes. This allows the station to be used for voice communication, compatible amplitude modes, single-sideband operation, and data / telecode communication depending on aircraft equipment and operator requirements.

B1-PrK as the central block of Prima-KV

The B1-PrK does not work as a standalone cockpit radio. It is installed as part of the Prima-KV station and operates with the other system blocks. The transceiver is mounted on a shock-absorbing frame, connected to the cockpit remote control panel, and works with the antenna matching unit. The antenna matching unit is especially important in HF systems, because the aircraft antenna must be matched quickly and correctly to the selected frequency. Without proper matching, transmitter efficiency, communication range and system reliability can drop sharply.

Control and frequency operation of B1-PrK

The B1-PrK supports a wide operating frequency range with fine frequency spacing and programmable channel storage. In practical cockpit use, this means the crew can work with prepared frequencies rather than manually searching across the band every time. The radio station can store multiple channels in non-volatile memory, which is useful for civil, military, special-mission and remote-area operations. The unit is controlled from the remote control panel, while internal circuits manage reception, transmission, frequency stabilization and interaction with the connected antenna matching equipment.

Aircraft integration of the B1-PrK unit

The Prima-KV radio station with the B1-PrK transceiver can be installed on helicopters and fixed-wing aircraft. It is associated with Mi-8MTV-1, Mi-8AMT, Mi-171, Mi-38 and other helicopter platforms, including selected Kamov aircraft such as Ka-32, Ka-226 and Ka-52 depending on configuration. It may also be used on regional and special-purpose aircraft where HF communication is required. In many installations, Prima-KV can replace older HF radio equipment, but the replacement must be checked by aircraft type, wiring, antenna system, mounting frame and approved avionics configuration.

Interfaces and system connection of B1-PrK

The B1-PrK has modern digital control and interface options for aircraft integration. It can work with standard aircraft data exchange channels and serial interfaces used for control or system connection. This matters when the radio station is installed not only as a separate communication unit, but also as part of a broader avionics suite. Depending on aircraft configuration, the radio can be linked with cockpit control systems, remote panels, communication control equipment or mission equipment. Exact interface use must be confirmed from the aircraft wiring and installation documentation.

Supply, identification and documentation for B1-PrK

When ordering or replacing the unit, the designation B1-PrK, B1A-PrK or B1B-PrK should be specified clearly, because different modifications may have differences in configuration or interface options. It is also useful to specify whether the requirement is for the transceiver block only or for a complete Prima-KV radio station set with frame, control panel and antenna matching unit. For aircraft supply, the condition, completeness, documentation, modification, serial number and test status should be confirmed before shipment. The drawing reference LNVK.464511.001 may be used for identification where applicable.

Product Type: Airborne HF transceiver unit
Designation: B1-PrK / B1A-PrK / B1B-PrK
Radio Station: Prima-KV
Drawing / Reference Number: LNVK.464511.001
Function: Long-range aircraft radio communication in HF / decameter band
Application / Where Used: Aircraft communication systems; long-range voice and data communication
System / Installation Area: Airborne radio communication equipment, avionics bay / radio equipment rack
Compatible Aircraft / Equipment: Mi-8MTV-1, Mi-8AMT, Mi-171, Mi-38, Ka-32, Ka-226, Ka-52 and other aircraft depending on configuration
Replacement / Modernization Use: May be used in modernization programs replacing older HF radio stations such as Yadro-1, depending on approved aircraft configuration
Frequency Range: 2.0000–29.9999 MHz
Frequency Step: 100 Hz
Transmitter Peak Output Power: 100 W
Programmable Channels: 40 channels, non-volatile memory
Emission Classes: J3E, H3E / A3E, R3E, F1B, G1B
Receiver Sensitivity in J3E, R3E, F1B, G1B Modes: Not worse than 1 µV
Receiver Sensitivity in A3E Mode: Not worse than 4 µV
Frequency Stability: Maximum relative frequency error 5 × 10⁻⁷ after 7 minutes from switch-on
Power Consumption in Receive Mode: Not more than 110 W
Power Consumption in Transmit Mode: Not more than 390 W
Transmit / Receive Duty Cycle: 1 / 3 minutes
Average Automatic Antenna Tuning Time: 1 s through antenna matching unit
Cooling: Natural cooling, no forced airflow required
Operating Temperature Range: −55 to +60 °C
Digital Interfaces: GOST 18977-79 / ARINC 429 — 2 channels; RS-422 — 2 channels; RS-232 — 1 channel
Unit Weight: Not more than 5.5 kg
Complete Radio Station Weight: Up to 11 kg depending on configuration
Associated Blocks: PrK frame or B10A-PrK mounting frame; B5A1-PrK antenna matching unit; B7P1-PrK remote control panel
Technical Documentation: Product passport, technical description, installation and operating documentation as applicable

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.