Jim, in your wave shaper, do you use a 2.5V or 5.0V LM336 ? Your Mouser reference points to the 2.5V version but if Mouser's site is as reliable as Farnell's, better double check. :-> Thanks in advance. -- André Majorel <amajorel at teaser.fr> http://www.teaser.fr/~amajorel/