>>after several month of use. So your comment "Your milage may wary" is very >>correct. >> >> Roberth Lundin > >Roberth, that is _exactly_ what I was commenting on. Many others have now >added their input, which (without saying it in the same words) is, "Your >mileage may vary." > >Andy I highly recommend the book "ESD from A to Z" by Kolyer and Watson. Van Nostrand Reinhold ISBN 0-442-00347-1. It's not a theoretical treatment, it's a collection of practical measurement techniques and production guidelines. Reg Neale