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I was wondering what the concensus was on making a brass box for my power filter, which consists of a tranny (thats not a tranvestite) & filter caps to suck out the crap from the ac line.
I recall seeing on mythbusters they used brass mesh as a RF screen & was wondering if it would be a good idea to make the box out of brass sheet which is easy to work. Currently it is housed in steel.
I recall some discussion on copper having a diode effect, is this relevant?
thanks
Follow Ups:
Hi.
I have seen some audiophile grade power strips & powerline conductors installed in housing built with thick shiny brass plates, asking for big bucks.
Quite a few willing audiophiles find such brass plate housings improve the sound vs steel or plastic enclosures. Believe it or not?
From RFI/EMI shielding aspects, thicker the shielding enclosure will get better absorption loss to more I^2R loss inside the shield material. Brass, being a largely copper+ less zinc alloy, is more conductive than steel which is perromagnetic. It offers much better reflection loss to
high frequency noises (beyond 10MHz).
It worths giving it a try if your local brass plate supplies won't charge you too much.
c-J
PS: many musical instruments are made in brass, right?
As long as someone is spending big buck$, isn't bronze to be preferred to brass?
Hi.
Layman term for brass is yellow copper, & bronze is green copper.
Both are copper alloys. Brass, also called 'commercial bronze', is commonly made up of 90% copper & 10% zinc. Bronze is typically made up of 88% copper & 12% tin.
My audiophile friends use power strips or power conditioners built with thick brass plates only, not bronze.
It is not a matter of cost more or less, they find brass plated power strips or powerline conditioners sound better.
c-J
one reason why brass, bronze or copper sounds better is that they are conductive metals and will pass any eddy currents through them much quicker than steel which has a much higher electrical resistance. In addition they are non magnetic so there will be less magnetic induction.
Stu
You'd be shocked at the effect of replacing metal parts, like transformer bolts, with copper alloy or titanium... even the junctions of things like clip connectors will have intrinsic resonances... that's why I think viscous contact syrups like Stabilant-22 (love the stuff on AC connections, a little murky for the first 100 hours, then very clean) remove a layer of grime...
I already use Stabilant 22 with all connectors. I agree with your findings about the 100 hours.
I am not sure why brass does what it does, but..
I attached a brass slab under my Furutech etp60 (a very light power distributor), and the musical presentation difference on my system was mind boggling. The music was clearer and bigger. It wasn't even inside the distributor. It was just acting as weights.. I think?!
Cheers,
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