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Steve and Speed, who said anything about putting inductors in ground lines? Audience winds each pair of common and hot leads thru an inductor, but green-ground/earth is always anchored solidly to earth.. Or am I missing something here?
I bought a 'Green Wave Broadband EMI Meter' thru Amazon...https://www.amazon.com/gp/product/B01MEFVYQD/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1...just for kicks and measured a few outlets in my musicroom. A nondedicated outlet on the back wall measured 200 - 300 mV, while the lowest measurement came from an unused outlet of my Balanced Power Technologies 3.5 Ultra at around 50mV.(1)One thing I've been wondering about is just how much the sounds from a device that's fed in parallel from one duplex outlet is altered by the noise created by its 'partner'.. I measured the noise from an outlet in a general- purpose branch circuit that feeds my projector.. It measured around 200mV with the projector plugged in but not turned on; with the PJ turned on, it measured over 2000mV!!!!!!!!!! (I did NOT measure, in the same way, noise from outlets of the BPT3.5.).. I wonder how such noise affects the sounds of other equipment.. I have to think that audience's method of filtering and isolating EACH outlet of, for instance, the 12 in an aR-12 conditioner...https://www.audiocircle.com/index.php?topic=106120.msg1134610#msg1134610...both inductively and capacitively does a much better job of NOT feeding noise created by a piece of equipment into its partner outlet.. Such groupings or partnerships can be large.. For instance, my BTP has all-12 outlets fed in parallel.. While each duplex outlet has a small EMI-filtering cap on it, that looks to me like a rather feeble effort at isolation.. PS Audio's P20...https://www.psaudio.com/directstream-p20-power-plant/...has five groups of 2 or 3 duplex outlets.. Each outlet within each group is driven in parallel with NO isolation among the other outlet(s) of that group.. I'm wondering how that can be good! What do we think about this?(1) Before I get flamed too hotly, allow me to state that I believe, first, that EVERY change to a music-reproduction system changes its sounds, whether you or I or the next guy can hear those changes--or not; that such subtle changes are cumulative; and it's not what's measured but what's (very carefully) heard that matters.. After all, "...not everything that can be counted counts, and not everything that counts can be counted." (William Bruce Cameron)(2) I also believe that most of us use way-too-'large' superlatives to describe changes in sound quality. Such terms include 'night and day', 'black and white', and my unfavorite, 'totally different'.. Perhaps the 'biggest' my perception gets is 'clearly audible'.(3) I think my thinking about this entire subject is a result of a flare-up of my GAS, in that my current system......is the best-sounding system I've EVER heard(4) and is definitely an improvement over that from, say, a year ago.. I think most of those improvements are due to the addition of both a pair of Quad '2905s and Atma-Sphere MA-1 poweramps and my minor imporvements to the latter.(4) Do understand that I don't go about searching for SOTA music-reproduction systems.
The noise sniffer is a toy. Just return it to it's owner.
Can you explain how 'it measures RFi voltage in the air" when it only registers WHEN IT IS PLUGGED INTO THE AC duplex?True it does not register the specific frequency of the noise. (it is designed for idiots to use. true.)Sorry the device is user reproducible. repeated use gives the same values (with the same variables).Reposition the probe? Yes it is either in the AC duplex or not. LOLAnd the final complaint is a hell of a lot of work, perhaps you should stat a business fixing the millions, perhaps billions of electrical object that fail your level of perfection.added. my only guess is you are thinking of a "voltage detector" which is a different sort of device and is used to detect voltage RFI 'IN THE AIR".. I own one of those, a Greenlee GT-16, they cost $23 on Amazon, and not the $2000 the device I borrowed cost.
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