I bought an ATAS-100 at a good price from a friend. It is a compromise antenna, and I knew that going into it.
I drive a small car - a Hyundai Elantra GT Hatchback (2002). I've been struggling to find good ways to mount this thing, and mostly failing. I've carefully perused http://www.k0bg.com/antmount.html
and still am stuck. The vehicle is small, lightweight, and has "European" styling - almost no flat surfaces on the body.
The ATAS-100 has a recessed PL-259 connector and requires an SO-239 base. I'm guessing this is because the control for the screwdriver doesn't use a separate control connection, but I'm not sure. Anyhow, the two main options I'm coming up with are a hitch mount (or some similar mount that would be low and rear, and a side mount of some sort. K0BG explains repeatedly why a hitch mount, or other low-rear mount, isn't a good idea (poor ground plane). Other hams also suggest that a low-riding antenna will radiate poorly towards the front of the car. KB0G suggests a ball mount for the side. Trouble is, I can't find any ball mounts with SO-239 connectors. I suspect that the occasional 3/8-to-SO239 adapters I've seen won't work because I'm guessing the ATAS-100 does really require both legs of the SO-239 to be connected to the radio to drive the motor.
I live in Kansas. It is not uncommon to have a 40MPH headwind while I'm driving down the Interstate with a 75MPH speedlimit. That's a 115MPH wind load. I ran a simple Hustler vertical for 20m on a mag mount, which blew off my roof recently. I have very limited options for lip mounts on this vehicle anyhow, and I have no doubt that what K0BG said about lip mounts causing damage is true. I want to avoid mag mounts, even the 3-magnet ones, based strongly on my experience with them and K0BG's advice.
Anyone got some ideas for me? I'm pretty much stuck on something good for this car.