Metal coil antenna vibration help needed

Apparently its mass and length make it resonant at either the speed of the air over it at those road speeds, or it's resonating with vibrations in the vehicle at the engine/transmission speed required to move you at 25-40 mph. Since you can't arbitrarily change the length if it's tuned correctly now, you can experiment with either some manner of air dam to change the airflow over or around the antenna, or you can put a weight with a set screw on the whip at some height that will damp out the vibrations.
The lower you can put the weight, of course, the less effect its wind drag will impart to the antenna. And a couple of extra ounces along the length shouldn't really affect the antenna's tuning or SWR.
Easiest fix might be to just move where the antenna is mounted, but then all my science stuff will have been wasted

Either that, or something else. <---- Handlebar's Universal Disclaimer&#174; (Handlebar Enterprises, 1981)

 

I don't know how you've determined that the coil is putting out all the vibration noise. I'll go along with the idea that the coil is making most of the noise, but it's stil the whip that's vibrating and carrying those vibrations.
But if you wish to discount the physics, then by all means, buy their mount. Remember, though, that the mount only holds the end of the whip, not the coil itself. Were they able to explain to your satisfaction how buying another of their products will solve the problem when the piece it holds is ...... the whip?

 

naw just wad up a snot rag and put it between 2 of the helicals that wil danmpen it thats what i done...

 

gude 2 go git r dun