[sdiy] shielding question

[Andre Majorel]

On 2010-06-24 17:35 -0400, Travis Thatcher wrote:
> On Thu, Jun 24, 2010 at 5:15 PM, Andre Majorel <aym-htnys at teaser.fr> wrote:
> > On 2010-06-24 04:37 -0400, Travis Thatcher wrote:
> >
> >> I am trying to put together a live rack consisting of (in top to
> >> bottom on the rack):  furman power conditioner, motu2408mkII,
> >> patchbay, roland gr-1 reverb, diy tb3031 + tbDac.
> >>
> >> before the reverb was fine, sitting on top of the rack. in this
> >> configuration there's noise as it is resting on the 3031.  i can move
> >> it up a space, but still some nice hum. when i turn off the 3031, the
> >> hum is gone. all power is connected to the furman conditioner.
> >
> > A wild guess : the TB-3031 is powered by an EI transformer and the
> > enclosure is made of aluminium ?
>
> yeah

Then there's nothing to stop the magnetic field that it leaks.
Perhaps some strategically placed sheet steel would help. The
thicker the better.

Toroidal transformers are supposed to have less leakage.

-- 
André Majorel http://www.teaser.fr/~amajorel/