B7A2-YAPL / B7A2-JAPI

B7A2-YAPL / B7A2-JAPI control panel in the Yadro-1G system

B7A2-YAPL / B7A2-JAPI is an onboard control panel used as part of the Yadro-1G HF aircraft radio communication system. The unit provides the flight crew with control over the operating modes and functions of the onboard HF radio station installed on the aircraft. It is not a standalone radio device; it operates as a cockpit interface within the complete Yadro-1G radio communication system and supports interaction between the crew and the radio equipment during flight operations.

Radio station control through B7A2-YAPL / B7A2-JAPI

The B7A2-YAPL / B7A2-JAPI panel allows the crew to control the working modes of the Yadro-1G HF radio station from the cockpit. Through the panel, pilots can select working frequencies, set operating modes, adjust audio volume and check the serviceability of the radio equipment. The panel transmits control commands to the connected HF radio blocks, including the transceiver, power amplifier and antenna tuning equipment. This allows the main radio equipment to remain installed in the radio compartment while the crew keeps direct control from the cockpit.

Frequency setting and code control of B7A2-YAPL / B7A2-JAPI

The B7A2-YAPL / B7A2-JAPI uses a discrete frequency setting principle with mechanical selection drums and numerical frequency indication. The panel supports frequency selection within the working range of the connected Yadro-1G radio station. Control is performed remotely by a “2 out of 5” code command system, which is used to transmit frequency and operating commands to the radio equipment. Stable operation of the control panel depends on the condition of selectors, switches, connectors, electrical supply and the connected Yadro system blocks.

Installation of B7A2-YAPL / B7A2-JAPI in the cockpit

The B7A2-YAPL / B7A2-JAPI control panel is installed in the aircraft cockpit, normally on the instrument panel, overhead electrical panel or communication control area depending on aircraft type and layout. On Mi-8 / Mi-17 helicopters, this type of panel may be mounted on the right side of the upper cockpit electrical panel, close to other communication and navigation controls. The panel is built for aircraft operating conditions, including vibration, temperature variation and onboard electrical loads.

Aircraft application of B7A2-YAPL / B7A2-JAPI

The B7A2-YAPL / B7A2-JAPI is used on helicopters such as Mi-8, Mi-17 and related modifications, as well as on other aircraft equipped with Yadro-1G or related Yadro-family HF radio stations. The radio system provides long-range two-way HF communication between aircraft and ground stations. Since aircraft communication installations may differ by modification, installed radio version and modernization status, applicability should be confirmed through the aircraft equipment list, wiring documentation and radio station operating documentation before supply or installation.

Identification and ordering of B7A2-YAPL / B7A2-JAPI

The control panel may be referenced as B7A2-YAPL, B7A2-JAPI, B7A2-IPR1, B7A2-YaR1, B7A2-YAR1, B7A2-JAR1, B7A2-PR1, Б7А2-ЯР1, Пульт Б7А2-ЯР1 or Б7А2ЯР1. In some inventories and export lists, the unit may appear as “Control Panel” or “Control Unit HF”. These names should be checked against the actual marking plate and aircraft documentation before ordering. For correct supply, it is useful to specify the aircraft type, installed Yadro radio version, required condition, connector configuration and documentation requirements.

Product Type: Onboard radio control panel / HF radio control unit
Designation: B7A2-YAPL / B7A2-JAPI
Alternative Designations: B7A2-IPR1, B7A2-YaR1, B7A2-YAR1, B7A2-JAR1, B7A2-PR1, Б7А2-ЯР1, Пульт Б7А2-ЯР1, Б7А2ЯР1
Possible Inventory / Export Designations: Control Panel, Control Unit HF, B7A2-YAPL Control Panel, B7A2-JAPI Control Panel, B7A2-IPR1 Control Unit HF, B7A2-PR1 Control Unit HF
Function: Crew interface for control of HF radio station operating modes
Purpose: Control of operating modes and functions of the onboard HF radio station
Application / Where Used: Aircraft HF radio communication systems
Associated Systems: Yadro-1G, Yadro-1G1 and related Yadro-family HF radio stations
System / Installation Area: Aircraft cockpit communication control area
Compatible Aircraft / Equipment: Mi-8, Mi-17 and related modifications, and other aircraft equipped with compatible Yadro-1G HF radio stations
System Role: Interface between flight crew and radio communication system
Controlled Equipment: HF transceiver, power amplifier, antenna tuning unit and auxiliary Yadro-1G system blocks
Frequency Range Controlled: 2.0000–29.9999 MHz, according to connected Yadro radio station
Frequency Step: 100 Hz
Frequency Setting Method: Discrete setting by mechanical selection drums
Frequency Indication: Mechanical drum counters
Control Principle: Remote control by “2 out of 5” code
Power Supply: 27 V DC
Control Features: Frequency selection, mode setting, volume adjustment and equipment serviceability check
Installation Location: Aircraft cockpit
Typical Mi-8 / Mi-17 Location: Right side of the upper cockpit electrical panel, depending on modification
Approximate Dimensions: 146 × 118 × 160 mm, without protruding knobs
Approximate Weight: About 2.1 kg
Condition: As applicable
Technical Documentation: Technical and operational documentation, aircraft wiring documentation, product passport and test records if available

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

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.