Aircraft Spruce & Specialty Co.
Corona, CA | Chicago, IL
Wasilla, AK | Peachtree City, GA
Brantford, ON Canada
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COMANT VHF COMMUNICATION CI-121
MFR Model# CI-121
Overview
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Frequencies Covered 118-137 MHz Similar to the CI 109, the CI 121 is smaller in diameter and lighter at only 0.5 pounds. Features a tapered glass laminate housing and die-cast aluminum base. Offers standard mounting and appearance to many Cessna communication antennas. The CI 121 has been re-tested and upgraded to the new RTCA DO-160D environmental requirements and offers the 118 to 137 MHz frequency associated with DO-186A MOPS. Note: Gasket included. Applications
Consult your FBO or installation shop for best application information. |
Specifications
MODEL- CI 121 VHF ANTENNA | |
Electrical | |
Frequency | 118-137 MHz |
VSWR | 2.5:1 Maximum |
Polarization | Vertical |
Radiation Pattern | Omnidirectional |
Impedance | 50 Ohms |
Power | 50 Watts |
Mechanical | |
Weight | 0.5 lbs. Max. |
Height | 18.50 in. Max. |
Material | Cast Housing / Fiberglass Whip |
Finish | Polyurethane Enamel |
Connector | BNC (Female) |
Environmental | |
Temperature | -55ºC to +85ºC |
Altitude | 50,000 ft. |
Airspeed | 250 KTAS |
Federal Specifications | |
RTCA Environmental | DO-160D |
FAA TSO | C37d, C38d |
Gasket | |
B12607-3 | Cork Neoprene |
Documents
- Tech Data and Specs (PDF)
Reviews
Came in 1-day and packaged correctly, so no damage. Good Job.
Dont come with fasteners. Used C8x8 to attach to wing root of PA-18
I can't comment on performance of the antenna yet. This product does not include screws..... I had to order screws from Spruce and am waiting for them to arrive.... You would think that for $ 174.00 that they would at least throw in a 4 screws...... Poor form, so far.
Ive used Comant on other homebuilt projects and had no complaint. I guess I just didnt read all of the text or ask questions on this one. I received the box, and as stated, there was an antenna and a gasket in it. Period. Not even instructions! (not that you really need em, but still, theres usually something with an admonition that you shouldnt take a shower with this thing while its radiating). Fortunately, I had some thicker stock to use as a backer/baseplate, and I drilled 4 holes for the 8-32 screws I had, so its all installed just fine.
Q&A
Per the manufacturer: This antenna is designed for use on single engine aircraft. For twin engine aircraft a blade type antenna is recommended.
Please see the documents tab on this page for length and mounting information.
Yes this is will work with the KX155 but only for the Comm part of the unit, for the Nav portion Nav please use part number 11-15700.
Yes, this antenna can be used only for the COM portion.
