Olin Lathrop wrote: > > With the JW part - I've seen reports that not covering the window can > cause > > problems. > > Yes, I want to second that. Also RAM initialization is done "for free" (if very unreliably!) for /JW parts, by ambient light - then when you later burn an OTP Part it won't work as no initialization. I always cover windows, AL foil embedded in electrical tape is one way, it's pretty opaque (Unsure how UV opaque electrical tape is, it's not IR opaque.) Lots of other options (see the archives ) Mark -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.