I have used this antenna for VHF civilian aviation monitoring for 11 months with excellent results. The antenna is mounted on a Rhon tower at the 52 foot level 36 inches from the tower face. Coax is Andrew heliax fed to a Tair base unit and a Cessna 300 com aircraft radio. Previous monitor antenna was a Ringo Ranger modified to the 118-136 mhz band. The Centerfire gives equal or better results and is much smaller. I also use the Centerfire Discone for VHf/UHF monitoring on another receiver with excellent results.
I bought the antenna and put it up on a pole and using belden-9913 coax cable and i am surprised because its doing a good job on monitoring the airbands and compering it to my other custom made airband antennas and others.