Wendy was using 30-year old equipment.
I have not had the pleasure of looking at a System 55 but I have the
schematics and ferrite beads ain't innem. Considering that she was also
using a home built mixer and heavily altered Ampex tape decks, I'm betting
that the faraday cage was the most cost-effective way to get rid of the
noise when you look at the cost of dismantling every module and system in a
working studio. You are also looking at better alloys for signal and power
connector contacts - less chance of rectifying a nearby 50,000 watt AM radio
station.
Dave
> -----Original Message-----
> From: motm@yahoogroups.com [mailto:motm@yahoogroups.com] On
> Behalf Of John Mahoney
> Sent: Tuesday, September 12, 2006 6:54 PM
> To: 'MOTM litserv'
> Subject: RE: [motm] Cabinet shielding
>
>
>
> >I'll chime in even though I'm saying the same thing that's been said:
> >shielding the cabinet isn't necessary. My modular is in the
> same room as
> >half a dozen or so computers and other miscellaneous
> electronic devices,
> >including some completely unshielded digital circuits on
> breadboards, and I
> >don't seem to have any trouble with it picking up noise.
>
> Oh, your modular is ∗completely∗ free of noise? ;-) Of course you
> didn't say that, so consider this:
>
> Wendy Carlos said that building a Faraday cage around her entire
> studio reduced the noise level throughout. She concluded that RFI
> (radio frequency interference) is usually heard as broadband noise.
> So, where there's electrical noise (i.e. everywhere), there may well
> be an RFI issue.
>
> Fortunately, the noise level of good gear is low enough that we
> needn't obsess over this. I'm sure not interested in shielding my
> entire studio room! I'm not even sure how to do it.
> --
> john
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