AF amplifier
SB4-B1-YARII
Price on request
AF amplifier
Description
SB4-B1-YARII AF amplifier board in the Yadro-1 radio station
SB4-B1-YARII is a removable electronic subunit used as the signal detector and audio-frequency amplifier board in the B1-YARII receiver-exciter of the Yadro-1 airborne HF radio station. The module operates in the receive signal path and is responsible for extracting the audio component from the processed radio signal and amplifying it for further use by aircraft audio equipment. It is installed inside the parent receiver-exciter assembly and is not used as a standalone aircraft radio unit.
Signal detection function of SB4-B1-YARII
The SB4-B1-YARII module performs signal detection after the received signal has passed through previous selection and intermediate-frequency processing stages. Its detector section extracts the low-frequency speech component from the converted radio signal. This function is required for turning the received HF radio signal into usable audio information for the crew. Correct detector operation affects speech intelligibility, reception quality and the stability of audio output from the Yadro-1 radio station.
Audio-frequency amplification through SB4-B1-YARII
In addition to detection, SB4-B1-YARII includes audio-frequency amplification stages. The AF amplifier raises the detected audio signal to a level suitable for further routing to aircraft audio output equipment. This may include the aircraft intercom system, pilot headphones or other compatible onboard audio circuits, depending on the aircraft installation. If the module is defective, typical symptoms may include weak audio, distorted reception, absence of speech output or unstable low-frequency signal delivery from the receiver-exciter.
SB4-B1-YARII in the B1-YARII receiver-exciter
The SB4-B1-YARII subunit is part of the modular structure of the B1-YARII receiver-exciter. In the receive path, it receives the filtered and amplified signal from the SB2-B1 main signal selector / IF amplifier module. Inside SB4-B1, the signal is detected and then amplified at audio frequency. In system context, SB4-B1 also interacts with transmission-related audio circuits where low-frequency signal preparation and compression stages are used by the modulator path. Exact internal signal routing depends on the receiver-exciter documentation.
Yadro-1 and Yadro-II radio system application
SB4-B1-YARII is associated with the Yadro-1 airborne HF radio communication system and may also be referenced in the context of Yadro-II equipment, depending on documentation and designation practice. The radio station is used on different civil and military aircraft and helicopters equipped with compatible HF communication equipment. Application may include Mi-8 and Mi-17 family helicopters and other aircraft types. Since radio installations differ by aircraft, system version and modernization status, applicability should be confirmed by the equipment list and parent assembly configuration.
Identification and ordering of SB4-B1-YARII
The module may be referenced as SB4-B1-YARII, SB4B-B1-YARII, СБ4-Б1-ЯРII, СБ4-Б1-ЯPII or SB4-B1-YARII Unit. It may also be described as an AF amplifier board, audio frequency amplifier board, AFA signal detector, signal detector, electronic module, board or subunit. Before ordering, the exact parent assembly, decimal number, required condition and documentation set should be confirmed. The unit may be required for receiver path repair, B1-YARII receiver-exciter restoration, audio output troubleshooting or replacement of a defective detector / AF amplifier module.
Details
Product Type: AF amplifier board / signal detector electronic subunit
Designation: SB4-B1-YARII
Russian Designation: СБ4-Б1-ЯРII
Alternative Designations: SB4B-B1-YARII, СБ4-Б1-ЯP11, СБ4-Б1-ЯPII, SB4-B1-YARII Unit
Decimal Numbers: И82.032.081, И82.032.081-01, И82.032.081-03, И82.032.081-04
Alternative Product Names: AF amplifier board, audio frequency amplifier board, AFA signal detector, signal detector, electronic subunit, electronic module, board
Function: Signal detection and audio-frequency amplification in the receiver-exciter
Application / Where Used: Yadro-1 airborne HF radio station receiver-exciter
System / Installation Area: B1-YARII receiver-exciter / receive audio-frequency path
Associated Radio System: Yadro-1 / Yadro-II airborne shortwave radio station, depending on documentation
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: Detector and audio-frequency amplifier section
Input Signal Source: SB2-B1 main signal selector / IF amplifier after filtering and IF amplification
Output Signal Destination: Aircraft audio circuits, intercom system or pilot headphone circuits through radio station audio path
Construction: Removable electronic board / quick-replaceable 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
Payment & delivery
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.
- Description
- Details
- Payment & delivery
SB4-B1-YARII AF amplifier board in the Yadro-1 radio station
SB4-B1-YARII is a removable electronic subunit used as the signal detector and audio-frequency amplifier board in the B1-YARII receiver-exciter of the Yadro-1 airborne HF radio station. The module operates in the receive signal path and is responsible for extracting the audio component from the processed radio signal and amplifying it for further use by aircraft audio equipment. It is installed inside the parent receiver-exciter assembly and is not used as a standalone aircraft radio unit.
Signal detection function of SB4-B1-YARII
The SB4-B1-YARII module performs signal detection after the received signal has passed through previous selection and intermediate-frequency processing stages. Its detector section extracts the low-frequency speech component from the converted radio signal. This function is required for turning the received HF radio signal into usable audio information for the crew. Correct detector operation affects speech intelligibility, reception quality and the stability of audio output from the Yadro-1 radio station.
Audio-frequency amplification through SB4-B1-YARII
In addition to detection, SB4-B1-YARII includes audio-frequency amplification stages. The AF amplifier raises the detected audio signal to a level suitable for further routing to aircraft audio output equipment. This may include the aircraft intercom system, pilot headphones or other compatible onboard audio circuits, depending on the aircraft installation. If the module is defective, typical symptoms may include weak audio, distorted reception, absence of speech output or unstable low-frequency signal delivery from the receiver-exciter.
SB4-B1-YARII in the B1-YARII receiver-exciter
The SB4-B1-YARII subunit is part of the modular structure of the B1-YARII receiver-exciter. In the receive path, it receives the filtered and amplified signal from the SB2-B1 main signal selector / IF amplifier module. Inside SB4-B1, the signal is detected and then amplified at audio frequency. In system context, SB4-B1 also interacts with transmission-related audio circuits where low-frequency signal preparation and compression stages are used by the modulator path. Exact internal signal routing depends on the receiver-exciter documentation.
Yadro-1 and Yadro-II radio system application
SB4-B1-YARII is associated with the Yadro-1 airborne HF radio communication system and may also be referenced in the context of Yadro-II equipment, depending on documentation and designation practice. The radio station is used on different civil and military aircraft and helicopters equipped with compatible HF communication equipment. Application may include Mi-8 and Mi-17 family helicopters and other aircraft types. Since radio installations differ by aircraft, system version and modernization status, applicability should be confirmed by the equipment list and parent assembly configuration.
Identification and ordering of SB4-B1-YARII
The module may be referenced as SB4-B1-YARII, SB4B-B1-YARII, СБ4-Б1-ЯРII, СБ4-Б1-ЯPII or SB4-B1-YARII Unit. It may also be described as an AF amplifier board, audio frequency amplifier board, AFA signal detector, signal detector, electronic module, board or subunit. Before ordering, the exact parent assembly, decimal number, required condition and documentation set should be confirmed. The unit may be required for receiver path repair, B1-YARII receiver-exciter restoration, audio output troubleshooting or replacement of a defective detector / AF amplifier module.
Product Type: AF amplifier board / signal detector electronic subunit
Designation: SB4-B1-YARII
Russian Designation: СБ4-Б1-ЯРII
Alternative Designations: SB4B-B1-YARII, СБ4-Б1-ЯP11, СБ4-Б1-ЯPII, SB4-B1-YARII Unit
Decimal Numbers: И82.032.081, И82.032.081-01, И82.032.081-03, И82.032.081-04
Alternative Product Names: AF amplifier board, audio frequency amplifier board, AFA signal detector, signal detector, electronic subunit, electronic module, board
Function: Signal detection and audio-frequency amplification in the receiver-exciter
Application / Where Used: Yadro-1 airborne HF radio station receiver-exciter
System / Installation Area: B1-YARII receiver-exciter / receive audio-frequency path
Associated Radio System: Yadro-1 / Yadro-II airborne shortwave radio station, depending on documentation
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: Detector and audio-frequency amplifier section
Input Signal Source: SB2-B1 main signal selector / IF amplifier after filtering and IF amplification
Output Signal Destination: Aircraft audio circuits, intercom system or pilot headphone circuits through radio station audio path
Construction: Removable electronic board / quick-replaceable 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
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.