According to RussellMc on Thu, 01/24/13 at 22:00: >=20 > Echo there may be but logical response there still, it seemeth, be not. > If problem solution , rather than companionable chat, is the aim of > the exercise then any more discussion until you have tried the super > simple task of placing a large capacitor across power supply and > seeing how it goes (did you hear an echo) is worse than pointless. . Relax down under. :-) I have to finish the work week first, then this weekend (mere hours away) I will dig out the oscilloscope, the soldering gun, the large capacitor, etc. and find out what the answer is. It was only last evening that I was able to determine the part number for the wall wart as someone had asked for earlier in the week. :-) Regards, web... --=20 William Bulley Email: web@umich.edu 72 characters width template ----------------------------------------->| --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .