On Thu, 6 Nov 2008 02:24:48 -0500, Ed Cregger wrote:
"Tehrasha Darkon" wrote:
On Wed, 5 Nov 2008, Mark wrote:

I've been a ham for over 30 years and I have a lot of experience with
EMI, but this one has me scratching my head. The wheel static
changes repeatably in different locations for no apparent reason.
It's got to be something to do with the pavement. Anybody have any
experience with this?

My guess is different lengths/types/orientation of rebar in the roadbed.

Or electronic/magnetic sensors embedded in the road.

I've been able to associate _hash_ , not *static* , to DOT-type roadside
traffic informational signs -- usually the solar-assisted, battery
operated style. My guess is they use some high-KHz power conversion
and/or some not-so-well shielded electronics to operate the sign. The
effect, though, is seen over a quarter mile, or less, section of the road.

Jonesy
--
Marvin L Jones | jonz | W3DHJ | linux
38.24N 104.55W | @ config.com | Jonesy | OS/2
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