VO-029 2.243.688

VO-029 RF unit in the Kurs MP-70 system

The VO-029 / 2.243.688 is an aircraft RF power divider unit used in the Kurs MP-70 onboard navigation and landing system. It works inside the radio-frequency signal path, where signals from the antenna-feeder system must be divided and delivered to several receiver channels. The unit is not a cockpit control device and does not process navigation information for display. Its role is in the RF section of the system: to distribute high-frequency signal power while preserving stable operation of the connected receiving channels.

RF signal division through the VO-029 block

In navigation and landing equipment, one antenna-feeder signal may need to be sent to more than one receiver path. The VO-029 performs this division in a controlled way, reducing unwanted interaction between channels. This helps the course and glide path receivers operate independently while receiving the required RF input. If the divider is damaged, poorly connected or mismatched, the system may show weaker reception, unstable indication, channel interference or difficulty during functional checks. For this reason, the divider is treated as part of the complete RF chain.

VO-029 in course and glide path channels

The VO-029 is used in RF signal paths related to course and glide path operation within the Kurs MP-70 system. These channels work in different frequency bands and require stable signal transmission from the antenna system to receiver equipment. The power divider does not generate course or glide path signals by itself. It provides the required signal distribution and isolation so that receiver channels can work without unnecessary loading or cross-influence. This is especially important in landing systems where signal quality directly affects the reliability of cockpit indication.

Aircraft application of the VO-029 unit

The VO-029 / 2.243.688 is associated with Kurs MP-70 installations on aircraft and helicopters, including Il-76, Tu-154, An-124, Mi-8 / Mi-17 and other platforms depending on installed avionics. The exact installation depends on aircraft layout, RF feeder routing and the configuration of the navigation and landing equipment. Before replacement, the unit should be checked against the aircraft parts catalog, Kurs MP-70 documentation and actual coaxial connection scheme. Similar RF blocks may look close, but they can differ by frequency range, connector layout and system assignment.

Installation in RF feeder lines

The VO-029 is normally mounted in equipment racks or installed directly in RF coaxial / feeder lines, depending on aircraft design. Since it works with radio-frequency signals, mechanical and electrical condition are both important. Technicians usually check connectors, coaxial lines, shielding, grounding, mounting security and signs of moisture or corrosion. Even a small issue in the RF path can reduce receiver sensitivity or create unstable operation. During troubleshooting, the divider should be checked together with antennas, feeders, receiver inputs and related switching equipment.

Operating environment and service checks

The VO-029 is designed for aircraft operating conditions and must remain stable under temperature changes, vibration and normal airborne electrical environment. The unit does not usually require crew interaction, but its condition affects the quality of radio navigation signal delivery. Inspection should include external condition, connector cleanliness, fastening, continuity of feeder paths and compatibility with the required frequency channels. If the unit comes from storage, the condition of the RF connectors and internal matching path should be verified before installation.

Identification and supply of VO-029 / 2.243.688

In technical documentation and spare-parts requests, the unit may appear as VO-029, ВО-029, V-029, IIC-VO-029 or by the drawing number 2.243.688. These designations usually refer to the same RF divider block used with the Kurs MP-70 system, but the exact marking and configuration should still be confirmed. For procurement, the full designation, aircraft type, system application and required condition should be specified. Product passport and technical documentation are normally requested for aviation supply and acceptance.

Product Type: RF power divider unit / airborne radio-electronic equipment
Designation: VO-029 / 2.243.688
Cyrillic Designation: ВО-029 / 2.243.688
Alternative Designations: VO-029, ВО-029, V-029, IIC-VO-029
Function: Division and distribution of RF signal power between receiver channels
Application / Where Used: Aircraft navigation and landing systems
System / Installation Area: Kurs MP-70 onboard navigation and landing system
System Role: RF signal splitting with isolation between receiver channels
Channel Application: Course and glide path RF signal paths
Compatible Aircraft / Equipment: Aircraft and helicopters with Kurs MP-70, including Il-76, Tu-154, An-124, Mi-8 / Mi-17 depending on configuration
Frequency Range, Course Channel: 108.1 to 111.9 MHz
Frequency Range, Glide Path Channel: 329.15 to 335.0 MHz
Installation Type: Mounted in equipment racks or RF coaxial / feeder lines
Operating Temperature Range: −60 °C to +50 °C
Vibration Resistance: In accordance with aviation airworthiness requirements
Associated Equipment: Kurs MP-70 receiver units, antenna-feeder system, RF coaxial lines and related switching circuits
Condition: As applicable
Technical Documentation: Product passport and technical documentation

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