Jeff Urban <
jurb...@gmail.com> wrote:
> Got these resistors. My dude picked them up somewhere, 1K ?? watt Dales. Little brown things.
>
> The ALL read like 1.001K, some 1.002. So that is why the were cheap. Well actually I can live with that.
What tolerate were these? From the armchair perspective, the lack of
1.000k sounds like those were binned out and sold as tigher tolerace.
> Anyway, our "quality control" testing included, after a few pints and tokes, a thermal characteristic test. Taking an average specimen and clipping it to the measuring device was adequate and then I put my butane lighter under it. Now I figure a Zippo is less suitable for this because of it having more hydrocarbons in the flue.
>
> If they were to accumulate on the body they could reach 1 microSeimens which would affect the reading to 1/1,000 + 1/1,000,000 to get ohms. something like that.
>
> So I am holding the lighter and we are both watching the Fluke. After a bit the resistor caught o fire.
>
> That MFer still read 1.001K.
>
> "I think it passed".
What are some other real life tests folks use to qualify components
outside of the standard boring stuff on a datasheet? For example an
assembled board can pass all tests, but still have terrible solder quality
and to my knowledge there isn't really a scoring or rating system for the
quality of final assembly.
Does anybody tug on leads anymore, or bend them to see if they break or
still solder? How often are there "surprise" lots of components that
completely suck?