[sdiy] Re:Need Some Advice

[patchell]

Colin Fraser wrote:

> > -----Original Message-----
> > From: owner-synth-diy at dropmix.xs4all.nl
> > [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Grant Richter
> > Sent: 27 July 2001 18:14
> > To: owner-synth-diy at dropmix.xs4all.nl; Dr Strangelove
> > Cc: synth-diy at dropmix.xs4all.nl
> > Subject: Re: [sdiy] Re:Need Some Advice
> >
> > Do not put the chips in the first time under power!
>
> This reminds me of something I do which is probably good practice - wear
> safety glasses the first time you power up an untested circuit.
>
> I have fortunately only heard the whistle of IC casing as it flew past my
> ear, never the sound of it hitting my eye...
>

    Worst one I ever had was a 330uF 10V cap that was the bulk bypass cap on
a DSP card.  The assembler put it in backwards....even under the best of
conditions, this is not good, but the system had a 300Amp (yes, three hundred
amps) power supply, and when I flipped on the power, boy did that baby
blow....sounded like an M-80, made a big bright flash.  All that was left
were the two legs soldered into the board.  The only remains to be found were
little tiny peices of epoxy embedded in the cables for the logic pods
connected to the board.  Only thing that saved me was the power switch was on
the opposite side of the rack.  Back then, safety glasses were only for wimps
and bedwetters as far as I was concerned (I have since reformed).

>
> Colin f

--
 -Jim
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