Homebrew PCBs

Norm, you are 100% correct - this is dangerous, and if you don't know 
exactly what you are doing, you shouldn't do it. A couple of years 
ago I was working with about 2500 volts from a big power supply and 
my attention wandered. I forgot to turn it off before reaching in to 
move something. When the shock hit me I literally thought I was going 
to die. After I picked myself off the ground, I put the supply away 
and got a much less powerful hv source that was limited to 20 ua or so.

It is also important to know that even with the power off, the 
capacitors will hold a charge for many hours if there are no "bleeder 
resistors" in the circuit.


At 11:37 AM 1/2/2013, you wrote:
>On 1/2/2013 8:03 AM, Jeff Heiss wrote:
> >
> > Can you suggest a place where 800uF, 500v caps can be found?
> >
>At the risk of offending some on this list, be aware:
>
>800 uf at 500 v  can be a lethal combination!  200  uf at 2000 v is
>absolutely LETHAL - and you only get one mistake!
>
>How do you intend switching this power? How will you generate the
>charging voltage (the charging voltage is also well into the lethal
>range!)?  Safe enclosures, relay isolation, interlocks  and grounding
>rods are required.   It's not like transistor supply voltages.  If you
>are not accustomed to this kind of voltage, please don't attempt it.
>
>Sorry to rant, but I speak from 65 years of industrial experience, much
>of that with 1Kv+ operations .
>
>Norm
>W6NIM
>
>
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