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In Reply to: RE: I explained that! posted by gusser on August 09, 2016 at 08:37:37
"Thinking that a mfd range cap does a better job filtering out RFI than a mmfd cap is just novice logic. If you have a bad RFI problem then you need a Pi filter."
In case you really want to know, look up Capacative reactance.
Follow Ups:
Uncle Mike, Setting aside the safety concern let me address the novice logic comment. In listening tests larger capacitance sounds better, plain and simple. It looks like it would be kosher from a safety point of view to compare an across the line say .47 to a 10uf Type X safety capacitor without too much effort or expense. IMHO, YMMV This is not based on theory or math but direct experience. Pretty much the reason for most if not all of my comments about recommendations. Anyone who either feels or knows that any of this is dangerous than don't do it. T
Your story has changed. You've gone from claiming 300uf capacitance to only 10uF. Seems like backpedaling to appear more reasonable within the forum. You seem to have a desire to make enormous capacitance values and massive wire gauges to be groundbreaking options to present to the forums, with no other explanations of what they actually do other than it "sounds better" to you. I have serious doubts about the veracity and intent of your eccentric evaluation processes other than coloring the sound just for the sake of it. If 300uF capacitance "sounds better" to your ear than a proper value capacitor for RFI suppression, then something must be seriously skewed in your audio system. Perhaps you are unknowingly attempting to provide a fix for one or more unknown radical tweaks you've previously done to make it "sound better".
First of all I never actually recommended 300uf across the AC, it's what I use. I did recommend larger than X type come in by accident because the manufacturer, Aerovox, told me they were X type. So if JR says they may be hazardous don't anyone use them. The 10uf x type look like they have been vetted for safety. The contention that if something sounds better it means there is something skewed in my system seems just another way to make everything I say seem false. And if it were true that there was something wrong that was remedied, I say hallaluya. Sounding better to me is good enough. I ain't backing down from that. I thought that's what we are here for. Except me, who is just an egomaniac trying to give people false info. Or just plain deaf. I prefer the latter as an insult but you can take your pick. Thick(er) wire, conductive greases, brass as footers, brass being better sounding than carbon fiber, the use of EAR isodamp as an excellent vib absorbing product are all things perceived by others. This whole hobby is substantially about opinion and experimentation. Maverick
Edits: 08/09/16
Tweaker456 wrote:
"First of all I never actually recommended 300uf across the AC, it's what I use."
That's more backpedaling on your part. In most cases, when end users post information about a configuration they choose for a particular application, that information is implicitly a suggestion, recommendation, or otherwise opinionated advice with an inference of propriety. Furthermore, since Audio Asylum not just a come-and-go chat room, you have to own what you say in a public forum. Search engines including Google and the AA Archives can provide valuable advice and insights that folks may come across over the course of many years, so you really should watch what you say, especially when it comes to any information about modification of the AC delivery path. Many years ago, when I posted a DIY report about a power cord I built with bulk-length speaker cable, I later came to greatly regret posting that potentially dangerous information, and still fully regret doing such an irresponsible thing, even to this day.
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