My appologies for the cross posting in my previous. However I guess there are a number of Shortwave listeners and Ham operators on this list who would have found my post worthwhile... For those interested in Mains Interference problems, here is an interesting proposal which just succeed..... www.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP013.pdf thanks ....... Zim -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads