Aircraft Spruce & Specialty Co.
Corona, CA | Chicago, IL
Wasilla, AK | Peachtree City, GA
Brantford, ON Canada
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COMANT VHF COMMUNICATION ANTENNA 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. |
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 | 19 in |
Material | Metal Housing / Fiberglass Whip |
Finish | Glossy White |
Connector | BNC (Female) |
Gasket B12607-3 | Cork Neoprene |
Federal Specifications | |
RCTA Environmental | DO-160D |
FAA TSO | C37d,C38d |
Applications
- Single engine piston aircraft for applications of this antenna design.
- Consult your FBO or installation shop for best application information.
Reviews
Verified Purchase
COMANT CI-121 VHF COMM ANTENNA BNC
Thank you
all ok
Great antenna!
Easy drop-in replacement for my 15-year-old Comant that had the same bolt pattern. Definitely well built and high quality. The reception is quite good as well. Overall very pleased.
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
Seem Ok . Everyones comments are no mounting screws or template .
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
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
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.
There is no application guide for this antenna showing which specific aircraft it fits. It is FAA TSO approved for use on certified aircraft. Please check with your A&P to detemrine if it can be legally installed.
No. This does not include those documents.
It will work for the COM portion of the radio.
