Hi
> On Apr 11, 2020, at 8:10 PM, Richard (Rick) Karlquist <rich...@karlquist.com> > wrote: > > > > On 4/11/2020 2:25 PM, Bob kb8tq wrote: >> Hi >> Would you *really* want to read a book about how from August of 1986 to >> January of 1993 AVX NPO’s had some sort of issue ( not that the issue is >> clearly known, just that they are flakey) and that by 1994 the parts with >> values below 220 pf in 0805 seemed to be fixed? >> Again, the task was never to *fix* a component, simply to sort out the parts >> that worked from the parts you didn’t want to use. The only feedback to the >> manufacturer was via the (lack of) purchase orders. >> Somehow I doubt anybody would make it past the first page …. >> Bob > > Back when before HP broke up into pieces, capacitor vendors considered > it a computer company and assumed that all capacitor orders were for > "computer grade" capacitors. This envisioned huge motherboards with > thousands of bypass capacitors. Like monitor specs where it is OK > for so many pixels to be bad, as long as 99% of the capacitors were > good ... ship them. As long as the average leakage current met some > spec, it didn't matter if a few of them were very leaky. The current > wouldn't be noticed. Tempco and dissipation factor didn't matter. > > We did actually give the manufacturer feedback, but it was not accepted > because we as an instrument division were not in their target market. > They didn't support repurposing. It didn't matter than we were owned > by HP; we were using them for the wrong end use. It's like those > disclaimers that say "We do not authorize for the life support > market" etc. > > Some vendors flat out would not sell to our division although they > were fine with the computer divisions. > > By now, few people besides Bob are still reading this. :-) > > Rick N6RK Indeed over the years, our experience was that feedback on components was at best unwelcome and at worst a major waste of everybody’s time. Lots of “dialog” and very little benefit. Unless you are a precision crystal company, oscillator companies are *not* a big customer for any component outfit …. Bob _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.