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In Reply to: Would a power conditioner help? posted by Mark Tinordi on April 24, 2007 at 00:54:56:
Well, the problem is that the switching power supply in your computer generates RF . . . and your phono stage is picking it up. This may be coming back through the powerline . . . in which case a good power conditioner or power strip with isolate outlets (especially ones for digital components). If you follow Bambi's suggestion and get a non-toroidal isolation transformer, that might work too. . . just be sure that the computer is plugged into the power on the primary side of the transformer. I specify non-toroidal because these units have a higher RF rejection than toroidal units.My concern is that the computer is radiating RF into the air, which your phonostage is picking up. If that's the case, no amount of power conditioner, isolation, etc. will do the job. Because of their high gain, phonostages are particularly susceptible to RFI. Relocating one or the other might help. Having them close to each other is definitely not good.
Is there any way you can just shut the computer off when you're playing records? That would be the best . . . and the cheapest solution.
Follow Ups:
"If you follow Bambi's suggestion and get a non-toroidal isolation transformer, that might work too. . . just be sure that the computer is plugged into the power on the primary side of the transformer. I specify non-toroidal because these units have a higher RF rejection than toroidal units."You can do two things here: you can add a faraday shield on the primary of the toroidal transformer, or use a RFI/EMI filter on the AC input to the toroidal transformer.
Then again; you can also put photographs of your self in the freezer, which is cheaper than buying Bybee purifiers.
d.b.
for those of us concerned about sound.
The photos in the freezer tweak works like gangbusters. For those concerned about sound.
I have not tried the photo in the freezer. Can you describe the technique? Any thoughts on why it works?(I do not demand understanding from a tweak to use it. I have been happily using the Bedini for over a decade. As a matter of fact, a demonstration of the Bedini impressed and mystified my biggest skeptic friend.)
Winthorpe: Please email me for technique....no need to upset the locals....:-)
Well, if you were overweight and put photos of yourself on the outside of the fridge, it might encourage you not to eat.The . . . um . . . "belt effect," right?
Hey; I'm in the middle of quitting smoking, so I'll deal with losing weight later. :)
d.b.
aerobic exercise -- running, swimming, cycling -- cures smoking.A few hours of hacking and wheezing all of that crap out of your lungs is a powerful disincentive to putting more crap in from a cigarette.
I know.
I know somewhere between 'jack' and 'shit' about this kind of stuff. Thanks for the simple explanation...Yeah, I do unplug my computer when I listen to records. It'd be nigh-unlistenable without it!
It probably doesn't help that the phono stage is about the cheapest tube one made (a Ming Da MC767-RD). I really have mixed feelings about buying cheap Chinese crap; on the one hand, it's buying Chinese and not American or British, and all sorts of things go with that... but then again, I'd never be able to afford my tube system without Ming Da and Antique Sound Lab (although in my defense, I didn't know that ASL was Chinese until I read the first line of the manual: "For avoiding vacuum tubes damaged, please don't make carton being upside down." ASL manuals are a hoot). And they're the only two Chinese things in my whole system; everything else is either homemade (by somebody else) or from a U.S. manufacturer. Still...
But yeah, if I had more money to spend, I probably wouldn't have this problem. But I'm not rich by any means... ah, money. Must be funny in a rich man's world.
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