SB2-B1-YARII

SB2-B1-YARII main signal selector subunit

SB2-B1-YARII is an electronic subunit used as the main signal selector and intermediate-frequency amplifier in the B1-YARII receiver-exciter of the Yadro-1 airborne HF radio station. The module is responsible for filtering the useful received signal from adjacent-channel interference and amplifying it at intermediate frequency. It operates inside the receiver-exciter signal path and is not used as a standalone aircraft radio unit. The subunit is part of the modular architecture of the Yadro-1 radio communication system.

Signal selection function of SB2-B1-YARII

The main function of SB2-B1-YARII is to provide principal selectivity of the received signal. After preliminary conversion and selection in the receiver-exciter path, the signal enters this module for more precise filtering. The subunit separates the required signal from nearby-channel interference and prepares it for further processing. Correct operation of the selector is important for receiver sensitivity, intelligibility, adjacent-channel rejection and stable HF communication. If the module is defective, the radio station may show poor reception, distorted audio or reduced ability to separate useful signals from interference.

SB2-B1-YARII as an IF amplifier

In addition to signal selection, SB2-B1-YARII operates as an intermediate-frequency amplifier. After the signal passes through the main selection filters, the IF amplifier stages raise the signal level to the value required for correct detector operation. The module may use quartz or electromechanical filter elements depending on the execution and documentation of the receiver-exciter. This filtering and amplification stage forms an important part of the receive path between preliminary RF processing and final signal detection.

SB2-B1-YARII in the B1-YARII receiver-exciter

The SB2-B1-YARII subunit is installed in the B1-YARII receiver-exciter, which belongs to the Yadro-1 airborne shortwave radio station. Functionally, it is located between the preliminary processing stage and the final detection / audio-frequency stages. A signal from the SB5-B1 main block enters SB2-B1 after preliminary selection and conversion. Inside SB2-B1, the signal passes through the main selection filters and IF amplifier stages. The filtered and amplified signal is then sent to SB4-B1 for detection and low-frequency amplification.

Yadro-1 radio station application

SB2-B1-YARII is used in the Yadro-1 HF radio communication system installed on aircraft and helicopters equipped with compatible shortwave radio equipment. Application may include Mi-8 and Mi-17 family helicopters and other civil or military aircraft fitted with Yadro-1 radio stations, depending on aircraft configuration and documentation. Since HF radio installations may differ by aircraft type, radio station version and modernization status, applicability should be confirmed through the equipment list, receiver-exciter documentation and maintenance records.

Identification and ordering of SB2-B1-YARII

The subunit may be referenced as SB2-B1-YARII, SB2B-B1-YARII or СБ2-Б1-ЯРII. It may also be described as an IFA main signal selector, main signal selector, IF signal selector, electronic module or subunit. Before ordering, the exact parent assembly, decimal number, required condition and documentation set should be confirmed. The unit may be needed for repair of the receiver path, restoration of the B1-YARII receiver-exciter, Yadro-1 radio station maintenance or replacement of a defective IF selection module.

Product Type: Main signal selector / IF amplifier subunit
Designation: SB2-B1-YARII
Russian Designation: СБ2-Б1-ЯРII
Alternative Designations: SB2B-B1-YARII, СБ2Б-Б1-ЯРII
Decimal Numbers: И82.031.038, И82.031.038-01, И82.031.038-02
Alternative Product Names: IFA main signal selector, main signal selector, IF signal selector, electronic subunit, electronic module
Function: Main selection of received signal and amplification at intermediate frequency
Application / Where Used: Yadro-1 airborne HF radio station receiver-exciter
System / Installation Area: B1-YARII receiver-exciter / intermediate-frequency receive path
Associated Radio System: Yadro-1 airborne shortwave radio station
Compatible Aircraft / Equipment: Mi-8, Mi-17 and other aircraft or helicopters equipped with compatible Yadro-1 radio equipment
Parent Assembly: B1-YARII-1A; B1-IARP-1A; Б1-ЯРII-1А; Б1-ЯР2-1А
Module Role: Main signal selection and IF amplification section
Input Signal Source: SB5-B1 main block after preliminary selection and conversion
Output Signal Destination: SB4-B1 detector and LF amplifier subunit
Filtering Elements: Quartz or electromechanical filters depending on execution and documentation
Category: Aviation radio communication equipment / electronic subunit
Condition: New / As-Stored / Overhauled / Serviceable, depending on availability
Technical Documentation: Product passport, Yadro-1 radio station documentation, B1-YARII receiver-exciter documentation, test records and setup documentation if available

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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.