Re: Power Supply Question

Dan,

Here's what I suggest. Get a 500VA isolation transformer (115 VAC in,
115 VAC out) Take the output to a 500VA Variac. Get the kind that
goes from 0 to 140 VAC. Use a 400V, 10A bridge rectifier and a 10,000
uF, 250 VDC filter capacitor. This will give you 0 to 197 VDC output
with 2.5 volts ripple at a 3 amp load. Use a 10K, 5W bleed resistor
across the cap. Fuse the DC output with a 5A fast-blo fuse and be
careful.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "Dan Statman" <dan.statman@r...> wrote:
> This is unrelated to CNC, but you guys seem to know a lot about
power
> supplies. I am looking for a variable DC power supply capable of
3A and
> 0-200 Volts. Does anybody have a surplus one sitting around?
Anybody know
> where some plans would be to build one? Any help appreciated.
What would
> the cost of components be?
>
> I need this for a titanium anodizing tank that I would like to
build.
>
> Thanks,
>
> Daniel J. Statman, Statman Designs
> www.statmandesigns.com