SB6-B1-YARII

SB6-B1-YARII VFO frequency synthesizer board

SB6-B1-YARII is a removable electronic subunit used as the VFO frequency synthesizer in the B1-YARII receiver-exciter of the Yadro-1 airborne HF radio station. The module forms a stable discrete frequency grid required for accurate tuning of the radio station to the selected operating channel. It works inside the parent receiver-exciter assembly and is not used as a standalone aircraft radio unit. The subunit supports both receiver and transmitter operation within the HF communication system.

Frequency synthesis function of SB6-B1-YARII

The main function of SB6-B1-YARII is frequency synthesis for the variable frequency oscillator section. The module provides the tuning structure needed for channel selection and range coverage in the radio station. It forms stable frequency signals that allow the receiver-exciter to operate at the required working frequency. Correct operation of this subunit is important for accurate tuning, stable reception, reliable transmission and normal operation of the Yadro-1 radio station across its assigned frequency range.

SB6-B1-YARII as a VFO synchronizer

SB6-B1-YARII functions as a synchronizer / synthesizer for the VFO, or variable frequency oscillator. In this role, it supports controlled frequency generation and retuning across the operating range. The module works from reference-frequency signals supplied by the SB1-B1 reference oscillator. This reference input allows the synthesizer to maintain the required frequency stability and step structure. If the subunit is defective, the radio station may show unstable tuning, incorrect channel selection, failure to lock frequency or poor operation in receive and transmit modes.

SB6-B1-YARII in the B1-YARII receiver-exciter

The SB6-B1-YARII subunit is installed in the B1-YARII receiver-exciter, which is one of the main blocks of the Yadro-1 airborne shortwave radio station. In the receive path, the module supports local oscillator operation required for signal conversion. In transmit mode, it participates in forming the frequency conditions required for generation of the transmitted radio signal. It interacts with SB1-B1 as the reference oscillator and with SB5-B1 as the main high-frequency block involved in receive conversion and transmitter excitation.

Aircraft application of SB6-B1-YARII

SB6-B1-YARII is used in aircraft and helicopter HF radio communication systems equipped with the Yadro-1 radio station. Application may include Mi-8 and Mi-17 helicopters, as well as other aircraft fitted with compatible Yadro-1 shortwave communication equipment, depending on aircraft configuration and documentation. Since radio equipment installations can differ by aircraft type, radio station version and modernization status, applicability should be confirmed through the equipment list, Yadro-1 system documentation and B1-YARII receiver-exciter configuration.

Identification and ordering of SB6-B1-YARII

The module may be referenced as SB6-B1-YARII, SB6B-B1-YARII, СБ6-Б1-ЯРII, СБ6-Б1-ЯPII or СБ6-Б1-ЯPII-I. It may also be described as a VFO frequency synthesizer, V.F.O frequency synthesizer board, frequency synthesizer, electronic module, board or subunit. Before ordering, the parent assembly, decimal number, required condition and documentation set should be confirmed. The unit may be required for receiver-exciter repair, frequency synthesis troubleshooting, Yadro-1 radio station restoration or spare parts stock.

Product Type: VFO frequency synthesizer / electronic subunit
Designation: SB6-B1-YARII
Russian Designation: СБ6-Б1-ЯРII
Alternative Designations: SB6B-B1-YARII, СБ6Б-Б1-ЯРII, СБ6-Б1-ЯP11, СБ6-Б1-ЯPII, СБ6-Б1-ЯPII-I
Decimal Numbers: И82.209.016, И82.209.016-01
Alternative Product Names: VFO frequency synthesizer, V.F.O frequency synthesizer, frequency synthesizer, VFO frequency synthesizer board, electronic subunit, electronic module, board
Function: Formation of stable frequency grid and VFO frequency synthesis for radio station tuning
Application / Where Used: Yadro-1 airborne HF radio station receiver-exciter
System / Installation Area: B1-YARII receiver-exciter / frequency synthesis and VFO section
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: VFO synthesizer / frequency grid formation section
Receive-Path Role: Local oscillator signal formation for receiver operation
Transmit-Path Role: Frequency synthesis support for transmitted signal generation
Reference Signal Source: SB1-B1 reference oscillator
Associated RF Block: SB5-B1 main high-frequency block
Construction: Removable electronic board / subunit
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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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.