Re: 67 Amp 5 Volt Regulated Supply

Hello all,

While we're talking 'bout large surplus elctrolytic filter caps...

There is a tendency for these caps to go bad over time, and more so
if not used. So, if you are buying surplus, be careful. Most caps of
this type have a mfr. date which can be puzzled out. Try to use newer
ones if possible.

It is a good idea to "check out" the older ones. I use a variable DC
supply and set it to a low voltage. I put the capacitor(s) under a
cover (5 gallon pail) so if they "blow" I can contain the mess...
Believe me, you DON'T want to experience the smell and mess
of "exploded" filter caps more than once :-) Then, over a period of a
couple days, I gradually turn the voltage up towards the
intended "use" voltage. Let 'em cook at this for at least several
hours...

THEN, they can be checked to see if they are holding a charge and put
into use.

Hope this helps.

Ballendo

P.S. Alan, usually Estop switches are turned CCW to release from
a "pressed" state...

--- 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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