Check out here:

http://www.expresspcb.com/ExpressPCBHtm/Tips.htm

In the middle of the page there is info. This might be of some help.

Steve

Steven Kosmerchock
Radio Frequency Systems
Phoenix,  Arizona  USA
(WORK) www.rfsworld.com

www.geocities.com/researchtriangle/lab/6584

"Great spirits have always encountered violent
oppposition from mediocre minds."--A.Einstein

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