B5A-Yar1

B5A-Yar1 is an onboard HF antenna tuning unit designed for automatic matching of a high-frequency antenna with the transmitter output stage of an aircraft HF radio station. The unit ensures optimal impedance matching of the antenna-feeder system over the operating frequency range, which is required for efficient power transfer and stable long-range radio communication.

The B5A-Yar1 antenna tuning unit is used as part of Yadro HF radio communication systems, including Yadro-1A1 and Yadro-1G1, installed on helicopters and other aircraft. The unit operates in conjunction with the HF transceiver, power amplifier, control panel, and trailing wire antenna mounted along the aircraft tail boom.

The antenna tuning unit performs automatic tuning when the operating frequency is changed. Typical tuning time is several seconds, allowing the radio station to reach operating readiness quickly without crew intervention. The design of the unit is intended for operation under aircraft vibration, temperature variations, and other environmental conditions typical for aviation equipment.

B5A-Yar1 is installed in the aircraft radio compartment and is an essential component of onboard HF communication systems used for long-range simplex radiotelephone communication.

Purpose: Automatic matching of HF antenna with transmitter output stage
Systems: Yadro-1A1 and Yadro-1G1 HF radio communication systems
Application: Helicopters and other aircraft
Product Type: HF antenna tuning unit
Function: Ensuring efficient antenna matching across the HF operating band
Typical Tuning Time: 5 s
Maximum Tuning Time: 9 s
Power Supply: 27 V DC ±3.0 V
Unit Weight: Not more than 5.9 kg
Installation Location: Aircraft radio compartment
Scope of Supply: Not provided
Preservation and Depreservation: Not provided
Assigned Service Life: Not less than 17,000 flight hours
Design Service Life: Not less than 20 years from date of manufacture
Time Between Overhauls (TBO): 7,000 flight hours to first overhaul
Inter-Overhaul Interval: 5,000 flight hours
Shelf Life in Manufacturer Packaging: 2 years
Condition: As applicable
Documentation: Manufacturer passport and technical documentation available upon request

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.