Re: gEDA-user: Shall we use letters (i.e. E, C, B ) for transsitor pin names?

[Steve Meier <smeier@xxxxxxxxxxxxxxxxxxx>]

I would like to add, that in all fairness to the todays techs (and
todays assembly shops). Parts have become so small that they no longer
have descriptions such as 74LX04 on them they often have cryptic package
codes of 2 or 3 letters and the silk screening of these codes can be so
bad you are left asking is that round circle a 0 or O 0r 8.

Add this too the idea of parts in bins getting mixed and you have sure
fire trouble. So keep the parts in the tubes and keep the tubes
correctly labled add the package code to the tube lable so that you can
identify a miss tubed part.

If you have an assembly shop that bothers to check the package code to
what you kitted then you have one more reason to keep using them.

Steve meier


On Sun, 2007-12-16 at 23:13 -0800, Steve Meier wrote:
> Gene Heskett wrote:
> > On Sunday 16 December 2007, Steve Meier wrote:
> >   
> >> A "tech" once fixed a board that had a bad dip device. Did he use the
> >> same part that he pulled out? No he just got one that had the same
> >> number of pins.
> >>     
> >
> > Humm, so you are saying that the odds of his getting it right were about 
> > 1/100,000?  Sorry, but if that sort of performance passes as a tech, that is 
> > even worse than what you'd expect in the 3rd world.  I'll bet he couldn't 
> > solder either.  If it were up to me, I'd first see if he was interested in 
> > learning the differences and could be taught, if not, well don't let that 
> > doorknob hit him in the butt on the way out.
> >
> >   
> 
> I suspect the odds were better then that since he was limited to the
> parts in the bin and the right part was there. It would have still
> required getting the orientation correct.
> 
> 
> > You don't know me all that well here, I'm a 73 year old C.E.T. with an 8th 
> > grade education, and have been chasing electrons for a living since circa 
> > 1949, and I could regale you the rest of the night with the dumb-assed 
> > screwups made by sheepskin carrying engineers being paid lots of money.
> >   
> 
> 
> >   
> >> Dan McMahill wrote:
> >>     
> >>> al davis wrote:
> >>>       
> >>>> It's especially challenging when someone in the stock room mixed
> >>>> them in the same bin.
> >>>>         
> >>> I had a factory build up boards where they put a high speed single
> >>> channel current feedback amplifier in a spot on my board where the BOM
> >>> called out for a dual jfet input general purpose op-amp.  Then they
> >>> yelled at me for having a design which wasn't robust against switching
> >>> vendors...
> >>>       
> >
> > Switching vendors?  Similar part numbers maybe?  I've actually seen that 
> > happen.
> >
> >   
> >>> -Dan
> >>>
> >>>
> >>>
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> >>     
> >
> >
> >
> >   
> 
> 
> 
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