( Brand: Comant Industries ), ( Manufacturer Part Number: CI-507 ), ( Part Type: Antenna Splitter ), ( Port Labels: Vor / G-s / Ant ), ( Aircraft System: Navigation / Avionics ), ( Compatible Make: Avionics ), ( Connector Type: Rf Coaxial ), ( Application: Vor / Glideslope Signal Splitter ), ( Country Of Origin: United States )
Review COMANT INDUSTRIES Ci507 Vor Glideslope Diplexer Antenna Splitter
The **Comant CI-507 (CI507) Vor Glideslope Diplexer Antenna Splitter** is a high-performance, precision-engineered RF component designed to seamlessly integrate into aviation navigation systems, ensuring reliable signal separation and distribution for VOR (VHF Omnidirectional Range) and Glideslope (ILS Localizer) operations. This robust, weather-resistant unit is specifically engineered to meet the stringent requirements of the **TSO-C34C, TSO-C36C, and TSO-C40A** certifications, making it an ideal choice for aircraft installations where compliance with aviation safety standards is non-negotiable. The CI-507 operates as a dual-channel diplexer, efficiently splitting and routing VOR and Glideslope signals while minimizing signal loss, cross-talk, and interference critical factors in maintaining accurate navigation performance. Constructed from durable materials, including corrosion-resistant metals and high-grade dielectric components, this splitter is built to withstand the harsh environmental conditions encountered in aerospace applications, from extreme temperatures to high humidity levels. Its compact yet rugged design allows for easy integration into existing antenna systems, whether in commercial aircraft, general aviation, or military platforms, without compromising on performance or reliability. The CI-507 s precision-machined connectors and low-loss transmission lines ensure optimal signal integrity, reducing the risk of navigation errors that could arise from signal degradation or improper frequency separation. Whether deployed in a primary flight deck or auxiliary navigation setup, this diplexer serves as a critical link in the aircraft s communication and landing systems, providing the clarity and consistency required for safe and efficient operations. For aviation professionals seeking a dependable, certified solution for VOR/Glideslope signal management, the Comant CI-507 stands as a proven and trusted component in the realm of aeronautical electronics.
### **Pros and Cons of buying a Comant CI-507 (CI507) Vor Glideslope Diplexer Antenna Splitter (TSO-C34C, C36C, C40A)**
#### **Pros:**1. **Compatibility with Multiple Transponders** The CI-507 is designed to split VOR and glideslope signals, allowing a single antenna to serve both functions simultaneously. This is particularly useful in aircraft equipped with multiple transponders (e.g., TSO-C34C, C36C, C40A) that require separate antenna feeds.
2. **Space Efficiency** By combining two functions (VOR and glideslope) into a single unit, it reduces the number of antennas and associated hardware needed on the aircraft, saving installation space and weight.
3. **Improved Signal Integrity** A well-designed diplexer ensures minimal signal loss and interference between the two frequencies, maintaining clear navigation and approach signals.
4. **TSO-C Approved** The unit is certified under TSO-C34C, C36C, and C40A standards, meaning it meets strict aviation safety and performance requirements, ensuring reliability in critical flight operations.
5. **Versatility** Works with various aircraft systems, including older and newer models, making it a practical choice for retrofits or new installations.
6. **Reduced Maintenance** Fewer antennas mean fewer potential points of failure, simplifying maintenance and reducing downtime.
7. **Cost-Effective for Multi-Function Use** While the initial cost may be higher than a basic antenna splitter, it eliminates the need for separate antennas, potentially saving money in the long run.
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#### **Cons:**1. **Complex Installation** Diplexers require precise tuning and alignment to ensure optimal performance. Improper installation can lead to signal degradation or complete failure, which may require professional expertise.
2. **Limited Frequency Range** The CI-507 is specifically designed for VOR (108 117.95 MHz) and glideslope (329.3 335.0 MHz) frequencies. It may not be compatible with other navigation systems (e.g., ADF, DME, or newer digital navigation).
3. **Potential for Signal Interference** If not properly shielded or installed, external interference (e.g., from other avionics or electrical systems) could degrade performance.
4. **Cost** The upfront cost of the CI-507 and associated installation may be higher than using separate antennas, especially for smaller aircraft or simpler setups.
5. **Weight Consideration** While it reduces the number of antennas, the diplexer itself adds some weight, which may be a minor factor in very lightweight or ultralight aircraft.
6. **Dependence on Proper Tuning** The unit must be tuned to the specific frequencies of the aircraft s transponders. If the frequencies change (e.g., due to upgrades), retuning may be necessary.
7. **Limited Availability of Spare Parts** As an older or specialized component, finding replacement parts or technicians familiar with the CI-507 may be challenging compared to more common avionics.
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### **Conclusion:**The **Comant CI-507 Vor Glideslope Diplexer Antenna Splitter** is a highly specialized and useful component for aircraft requiring simultaneous VOR and glideslope reception through separate transponders. Its primary advantage lies in its ability to consolidate two functions into a single unit, saving space, weight, and installation complexity. However, it is not a universal solution it is best suited for specific applications where TSO-C34C, C36C, or C40A compliance is required, and where the benefits of a single antenna outweigh the costs and installation challenges.
For aircraft with simpler navigation needs or those not requiring glideslope functionality, separate antennas may be more practical. Additionally, the unit s performance depends heavily on proper installation and tuning, which may necessitate professional assistance.
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### **Recommendation:** - **Buy the CI-507 if:**- Your aircraft uses multiple transponders (e.g., TSO-C34C, C36C, or C40A) that require separate VOR and glideslope antennas.
- You prioritize space efficiency and reduced installation complexity.
- You are willing to invest in proper installation and tuning to ensure optimal performance.
- The aircraft s navigation system is compatible with the CI-507 s frequency range.
- **Avoid or Consider Alternatives if:**- Your aircraft does not require glideslope functionality or uses a single transponder.
- You are working with a tight budget and separate antennas would suffice.
- You lack access to experienced technicians for installation and tuning.
- The aircraft s navigation system operates outside the CI-507 s supported frequencies.
For most general aviation aircraft that do not require glideslope reception, a standard antenna splitter or separate antennas may be more practical. However, for aircraft equipped with the specified transponders, the CI-507 is a reliable and approved solution that can improve system integration. Always consult with an avionics specialist to ensure compatibility and proper installation.
Details:
Aircraft Avionics Component TSO Certified. Shows normal cosmetic wear consistent with aircraft equipment. This listing is for a Comant Industries CI-507 diplexer antenna unit used in aircraft avionics systems to split or combine signals between VOR and glideslope receivers. Removed from operational avionics system.
Comant CI-507 VOR / Glideslope Diplexer Antenna Splitter. The CI-507 diplexer allows a single antenna to serve both navigation receivers while maintaining signal integrity required for reliable VOR and ILS glide slope operation. Preowned aircraft avionics component. See photos for complete physical condition.
part #: ci507 prices
- $139.00-$152.00
specifications comnavavioni:
- brand: Comant Industries
- mpn: Ci-507
- part type: Antenna Splitter
- port labels: Vor / G-s / Ant
- aircraft system: Navigation / Avionics
- compatible make: Avionics
- connector type: Rf Coaxial
- application: Vor / Glideslope Signal Splitter
- country of origin: United States
returns comnavavioni:
- time: 30 Days
- paid by: Seller
- policy: Returns Accepted
shipping comnavavioni:
- type: Calculated
- cost: $8.30
- transit: 4-8 Days
- class: Standard, Expedited, One-day
- carrier: USPS, UPS
- service: USPS Ground Advantage, USPS Priority Mail, UPS 2nd Day Air, UPS Next Day Air Saver
seller comnavavioni:
- rating: 100.0%
- # reviews: 1039
- city: Arcadia, Florida
offer comnavavioni:
- quantity: 1
- started: March 8, 2026
- sold: 0
- best offers: True
- availability: In Stock
- options: Ship-to-home
general comnavavioni:
- Aviation Parts Accessories > Avionics > NAV/COMs
- condition: Used
payments comnavavioni:
- other
- wallet: Paypal
- credit card: Discover
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