I'm thinking of trying out or testing a halo antenna in a mobile installation, but wasn't sure which band a halo antenna would be most appropriate for in a mobile installation, especially since I have a medium-smallish sized car. I also wasn't sure if the halo ring element itself needed to be a minimum certain distance above the cars metal roof or body or no. I have a medium-small sized car, so I was thinking of trying to use a three or four magnet mount in the middle of the roof for it. I even thought about trying a 10 meter halo antenna, but thought that might be a bit large in a mobile installation, unless I kept it in the cars trunk or inside the back seat and deployed it when the car was parked stationary as a kind of "stationary mobile operation". I'm also not sure where I would obtain a halo antenna, as I currently have no shop, extensive tools or antenna building skills. So making my own is out of the question. Any suggestions or ideas would be appreciated.