Re: 67 Amp 5 Volt Regulated Supply

Hello all,

While we're on the subject of large surplus electrolytic caps:

This type of capacitor has a tendency to go bad over time, more so if
unused. There is usually a date code which can be "puzzled out"; use
newer ones if possible...

It is a good idea to "condition" the older ones before use. I use a
variable DC bench supply, set to a LOW voltage. I also cover the caps
with a 5 gallon pail to contain the smell and "guts" of
any "exploded" caps... Believe me, this is somethig you only want to
experience once :-) Over a period of a couple of days, I gradually
increase the voltage to the intended "working" level, and let
it "cook" there for at least several hours. Then, the cap can be
chacked for proper operation and put into use.

Hope this helps.

Ballendo

P.S. Alan, most Estop switches are "released" by turning the red disk
CCW.

--- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> Hi Jon,
>
> Thanks! That'll be great! Basically, I'm looking for caps for
these
> voltage/current ranges:
>
> Supply: 34V, 6A, cap: 35K, 40V
> 68V, 12A, cap: 60-80K, 75V
>
> I'd be happy to cover postage. I was checking yesterday, and didn't
> find ANY caps at Halted (surplus)! Lotta PC stuff, 'tho.
>
> I did manage to find a rack-mount full height box, with nice PB's,
> relays, power supplies, and some kind of processor in a shielded
box.
> Beautiful "Emergency stop" PB, I pressed it in, and it doesn't pop
back
> out! :>( I'm hoping there is a reset for it somewhere! Even
several
> DB 9, 25 and 34 cutouts on the back panel (not quite enough)!
>
> Alan KM6VV
>
>
>
> Jon Elson wrote:
> >
> > Alan Marconett KM6VV wrote:
> >
> > >
> > > Currently, ;>) I have a STACK of 28v, 6A transformers, and I'm
using
> > > them to build my supplies. Now to find some quality CAPS!
> >
> > You need caps? I've got a HUGE box of electrolytic caps. I
think I should
> > have a good selection in the 25 - 75 V range, too. Let me know
what
> > you need (volts and uF) and I'll dig and see what I find. I've
got somewhere
> > around 150 Lbs of this stuff, and will be glad to lower the
volume a bit
> > if you'll just cover postage.
> >
> > Jon
> >
> > Addresses:
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