B1-IARP-1A / B1-YarII-1A

B1-IARP-1A / B1-YarII-1A transceiver-exciter in the Yadro radio system

B1-IARP-1A / B1-YarII-1A is an onboard HF transceiver-exciter unit used in aircraft shortwave radio stations of the Yadro family, including Yadro-1A1 and Yadro-1G1 configurations. The unit performs the main receive and excitation functions of the radio station and works together with the power amplifier, antenna matching unit, remote control panel and auxiliary system blocks. It supports simplex radiotelephone communication between aircraft, as well as communication with ground-based HF radio stations.

HF signal reception and transmission through B1-IARP-1A / B1-YarII-1A

The B1-IARP-1A / B1-YarII-1A unit is intended for formation, reception and transmission of HF radio signals within the onboard radio communication system. In receive mode, it receives amplitude-modulated and single-sideband signals. In transmit mode, it forms the required operating mode and frequency grid, then amplifies and converts the high-frequency signal before it is supplied to the power amplifier. The final transmitted power is provided by the complete radio station configuration, not by the receiver-exciter block alone.

Frequency formation and operating modes of B1-IARP-1A / B1-YarII-1A

The B1-IARP-1A / B1-YarII-1A operates in the shortwave frequency range used for long-range aircraft communication. The unit supports fine frequency setting and operation in several emission modes, including single-sideband, amplitude modulation, AFSK and CW modes depending on system configuration. Frequency and mode selection are controlled remotely from the cockpit control panel. Stable operation of the unit depends on the condition of the associated control panel, power amplifier, antenna matching equipment, cooling system, onboard power supply and aircraft wiring.

B1-IARP-1A / B1-YarII-1A in aircraft HF communication

The unit is installed in the radio equipment compartment of aircraft and helicopters equipped with Yadro-family HF radio stations. Application references include Mi-8 and Mi-17 helicopters, as well as aircraft such as An-24, An-28, An-72 and Il-76, depending on the installed radio communication configuration and aircraft documentation. Since Yadro radio sets can differ by aircraft type and modification, applicability should be confirmed by the aircraft equipment list, wiring documentation and radio station maintenance manual.

Cooling and system integration of B1-IARP-1A / B1-YarII-1A

B1-IARP-1A / B1-YarII-1A requires forced air cooling during onboard operation. Cooling is normally provided through the aircraft ventilation or radio station cooling arrangement, including associated system blocks such as B18-YarI where applicable. The receiver-exciter operates with the power amplifier, antenna matching unit, control panel and auxiliary blocks of the Yadro radio station. A fault in cooling, antenna matching, power amplifier loading or power supply can affect transmission stability, receiver performance or operating reliability, so the block should be checked as part of the complete HF radio system.

Identification and ordering of B1-IARP-1A / B1-YarII-1A

The unit may be referenced as B1-IARP-1A, B1-YarII-1A, B1-YARII-1A, B1-YaRII-1A, B1-YR2-1A, Б1-ЯрII-1А, Б1-ЯР2-1А or Б1-ЯР-11-1A. The deletion / part number may be specified as I82.257.007-03. These designations can appear in aviation technical property lists, repair documents and export catalogs, but the exact execution should be checked before ordering. For correct supply, it is useful to specify the aircraft type, installed Yadro radio version, required condition, documentation set, connector configuration and whether associated blocks are also required.

Product Type: Onboard HF radio transceiver-exciter unit
Designation: B1-IARP-1A / B1-YarII-1A
Alternative Designations: B1-IARP-1A, B1-YarII-1A, B1-YARII-1A, B1-YaRII-1A, B1-YR2-1A, Б1-ЯрII-1А, Б1-ЯР2-1А, Б1-ЯР-11-1A
Deletion / Part Number: I82.257.007-03
Function: Formation, reception and transmission of radio signals within the onboard HF radio station
Application / Where Used: Aircraft HF radio communication systems
Associated Systems: Yadro-1A1, Yadro-1G1, Yadro-1A and related Yadro-family HF radio stations
System / Installation Area: Aircraft radio equipment compartment
Compatible Aircraft / Equipment: Mi-8, Mi-17, An-24, An-28, An-72, Il-76 and other aircraft equipped with compatible Yadro-family HF radio stations
Operating Frequency Range: 2.000–17.999 MHz / up to 17.9999 MHz depending on documentation
Frequency Step: 100 Hz with B7A1-YarI / B7A2-YarI control panels; 1 kHz with B7B2k-Zhl where applicable
Frequency Accuracy: Not more than 20 Hz after 15 minutes of warm-up, where specified by documentation
Emission / Reception Modes: OM / SSB, AM, AFSK, CW
Emission Classes: J3E / A3J, A3E / A3, F1B, A1A depending on system configuration
Receiver Sensitivity: 3 µV
Transmitter Peak Power, Complete Station: Not less than 100 W on working frequencies up to 12 MHz
Power Supply: 27 V DC ±2.7 V
Power Consumption: According to system configuration; up to 200 W in receive mode and 570–600 W in transmit mode for the complete transceiver system where applicable
Cooling: Forced air cooling required during onboard operation
Control: Remote control from cockpit control panel
Compatible System Blocks: Power amplifier, antenna matching unit, control panel and auxiliary Yadro system blocks
Approximate Block Weight: Not more than 8.6 kg; receiver-exciter block about 4 kg where specified separately
Approximate Dimensions, B1 with Power Amplifier Block: 463 × 252 × 203 mm
Condition: As applicable
Technical Documentation: Product passport and operating documentation upon request

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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.