On Sun, 11 Oct 1998, Dave VanHorn wrote:

> Well, 10Ghz microwave alarm heads can be had for very little $ at ham
> swap meets.  Some door openers are also microwave, either 10 or 24Ghz.
> You'll need a stable, quiet gain amp to amplify the Doppler output,
> but the fact that the target is the front end of a truck will help a
> great deal.

Isn't there a problem with outdoor mounting these things ? It would have
to be hanged above the road somehow and sit in the full sun all day.
Sounds like milspec parts to me.

Peter