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Hello,
I got a client with special needs and he needs to magnetically shield the psu´s of those. Euro 220 models.
Any help please? Same with his Ensoniq, his S3200 comes shielded from factory
thank you
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What's the concern? Interference with the audio path or some other gear in the studio?
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What's the concern? Interference with the audio path or some other gear in the studio?
Nope, severe EHS electrosensibility with juditial sentence since a few years ago. He lives isolated in a protected natural camp with even no mobile signal due to his severe level.
He can´t pass 15-30 nanoteslas ( the unit that measures magnetical camp of psu) and those unshielded reaches way far the top of the measurer 1999. This is a serious issue, as well with his big collection of vintage $$ synths. Also he can´t be close to high frequency ( microwaves, or electric camps), his house has been adapted with shielded biocompatible cables, otherwise he could even not be close to a wall plug.
There are two paths that I know , shielding the psu whatever can be do ( per example wrapping with mu-metal alloy designed for it) but the heat might damage or make more unstable some gear. Mu-metal is like aluminnium kitchen soft fold for sandwiches, not like a 80´s rack metal side of thought.
I have been told about making a "trafo" on the existing psu and that supposedly could shield those. I got no idea about that, never heard about.
The other path is extracting the psu and put them 2-3 meters away, since magnetical radiation do leaves. This might be easy in samplers, but a mess on old synths, even if leaving the original inside to preserve it´s value and making a exterior clone.
Luckily samplers as his S3200 comes shielded from factory and the measure is 1-5 only, not the others.
thank you
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Oh, that's serious. I think you will be better off asking this question on a forum like https://www.eevblog.com/forum/ or similar. You could replace the PSU with a modern one which usually is well shielded but AFAIK S950 uses a linear power supply and still needs AC voltage for some of the functions so I guess the best option would be to remove the PSU from the sampler and hide it in the external box for shielding.
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