On Tue, 2010-10-12 at 11:26 -0700, jim@jpes.com wrote: > So, taking all of this into account, it seems to reason that what is > being seen could happen. > Why it happens only when there is a load though is a puzzler. I still > believe it has to do with modulation > effects. The great thing about magnetrons is they are very small and cheap to build for their amount of power handling. The bad thing about magnetrons is their oscillating frequency isn't constant, it changes with the temp of the magnetron.=20 That would explain why you observe interference with loaded but not when unloaded. TTYL --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .