Bob,

On Mon, 24 Jan 2005 04:28:26 -0700, Bob Axtell wrote:

> Standard microwave guns have problems too. Switching LED arrays held close to the
> antenna cause a false  high-speed reading on one of the most popular 
> units here in the colonies. Its that tiny RF burst that is released when LED's are 
> switched on/off that cause the problem. F-15 cockpit displays had to have a shield 
> within the display glass to stop this, too. 

To stop them interfering with radar speed guns?  :-)

Reminds me of the story (Urban Legend, probably) about the Harrier that was doing a low-level training sortie 
over the Yorkshire Moors, and it's anti-radar missile system (HARM, or something similar) locked onto a police 
speed-trap!  Good thing that humans are still part of the "decision to fire" loop!  :-)

Cheers,



Howard Winter
St.Albans, England


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