On Sat, 8 Oct 2005, Jinx wrote: >> Since all three are pretty consistent, I think that we can >> accept the data as true > > Do resistor values trend upward with ageing / useage? Maybe > the manufacturers are smarter than you think. I don't measure > them too often but have a feeling my measurements were also > low (just checked a few lying around here and they all are). As > you say though, always in spec. Even a 5% carbon cheapie is > close to 1% ime carbon goes noisy, composition goes every which way plus noisy, and metal film goes up. Glass packed wirewound and metal film stay put for 60+ years when not abused. It depends on what you mean by 'old' and what happened to it meanwhile. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist