[sdiy] when the going gets weird the weird turn pro (battery power)

[John Luciani]

On 8/2/07, Anthony Bisset <abisset at dspaudio.com> wrote:
>
> Hallo,
>
> Last week I experienced a PSU failure and am wondering if my wiring is to
> blame?  The unhappy PSU has two +12 / G outputs.  I bridge one of the +12v
> to the ground of the other +12 output and then used the bridged connection
> as ground giving +12 and -12 at both ends with ground on the bridge. This
> worked fine for maybe one month.  Anyway, the supply is no longer
> supplying the necessary current to be useful, however the voltage is
> still there...

If the returns of each supply are isolated from each other and from earth ground
there should not be a problem. Since it worked for a month I would be surprised
if it wasn't isolated.

You should disconnect the bridge connection and load each output separately.
Also take a look at the output with an oscilloscope.

(* jcl *)



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