bibo01 Posted July 24, 2017 Share Posted July 24, 2017 55 minutes ago, mmerrill99 said: A measurement of the emi emissions from the cable (at the receiving USB port), like I posted JosephK had taken with Wireworld cables, I would imagine would be interesting to show differences between Clairixa & Lush & other cables Funny you say that. I was thinking to get a Lush just to send it to my friend (JK). How curious are you? Link to comment
bibo01 Posted July 25, 2017 Share Posted July 25, 2017 30 minutes ago, PeterSt said: So ... This should be a great day; After seeing those eye diagrams from the hifinews magazine and trying to interpret what could sound how, today I'll make me a test setup so I can show to myself how what looks. The fun of this is - and I sort of announced this longer ago already - that I am heavily biased. I mean, I already know what (cable) setup sounds how, but I deliberately never measured it. Looking at the hifinews pictures, it is easy to see how all measurements are subject to a general system behavior (like PC or USB interface). My setup will be subject to that too, but the interface(/DAC) I will set up for it, should be as general as possible. Thus, nothing like NOS1a/G3/SYZ/ABC etc. Actually just the USB interface with special measurement pins and the best "probe loading" I can (this latter in itself is not easy at all and maybe I can't even do it without disturbing the signal - we'll see). To give a few ideas of what I intend to achieve today for testing : 1. The Supra USB 2.0 which s*cks to me and other NOS1a owners (but which many like a lot) and which is advertised as being to USB2 spec. 2. A generic $1 cable which always comes with the NOS1a and which was the best for a long time. 3. The Clairixa, that being the best to spec cable, if all is right (at least I know exactly what it is). 4. The Lush, that being a deliberately out of spec cable (let's see to what degree ! ha !) a. With Intona. b. With Phisolator (DAC Side). x. With Regen (amber) at PC side. y. With Regen (amber) at DAC side. z. With double Phisolator (DAC side). Ad z. Nobody but me has experience with this because I can't make it consistently working (so far), but the sound coming from it is totally crazy. All sounds completely live from it, and you really can't determine whether it is a studio recording until the end, when the applause lacks. Ad a, b, x, y, z. I think I will do this with the Clairixa as this is supposed to be the best to spec cable and thus should show the best what happens with other devices in the chain. Of course the #3 measurement will be the base to compare with, at least in theory at this moment of writing. Anyway what I intend is testing 1, 2, 3, 4 separately and next take one of those to combine with a, b, x, y, z. This in itself should be with 2x Clairixa as this is done like that all over the globe (almost everyone with the Clairixa also has the "Short Clairixa for Intona"). Peter Hi, Great Peter! I understand that you are going to use all those cables and devices, but what are you actually going to measure? How curious are you? Link to comment
bibo01 Posted July 26, 2017 Share Posted July 26, 2017 On 7/24/2017 at 11:57 PM, mmerrill99 said: Yes that would be excellent - is the broadband radio receiver JK uses a difficult build & the technique to connect to scope? Maybe if that was detailed some others could do the same measurements. My post of JKs measurements of USB cables got no interest here so maybe there isn't a desire to do these type of measurements? Unfortunately, right now the device that JK used is at Fermilab in Chicago. I doubt that it is easy to replicate it, although he has a simpler, homemade one at the moment. He told me that he will let me know when he gets it back. So I will wait for possible measurements of Lush and eventually Clarixa.. How curious are you? Link to comment
bibo01 Posted August 1, 2017 Share Posted August 1, 2017 @PeterSt, what's the impedance of this cable? Have Lush and Clarixa the same impedance? How curious are you? Link to comment
bibo01 Posted August 8, 2017 Share Posted August 8, 2017 @PeterSt, does your cable have some similarity with AntiCable? i am thinking of the dielectric and the "air" you talked about... How curious are you? Link to comment
Popular Post bibo01 Posted August 18, 2017 Popular Post Share Posted August 18, 2017 BTW, possibly in the next few weeks I will be able to measure in non-traditional ways both Clarixa and Lush The Computer Audiophile, m3lraaHnevetS and ciccio1112 1 2 How curious are you? Link to comment
bibo01 Posted October 3, 2017 Share Posted October 3, 2017 @PeterSt Quantitatively, wouldn't a TDR (Time Domain Reflectometry) do? http://materias.fi.uba.ar/6644/info/reflectometria/basico/55W_14601_0 tdr Z measurements.pdf Pg.11-14 How curious are you? Link to comment
bibo01 Posted October 3, 2017 Share Posted October 3, 2017 8 hours ago, PeterSt said: Bibo, for almost sure yes, but then indirectly for the quality of the signal itself. So when we see reflections, for sure we would think that this is not good, right ? but if we at the same time see no protocol errors, then what. Then it comes down to the same as I talked about. ... Firstly, by using TDR, one establishes a difference between your two cables. For analog different tests can be performed. How curious are you? Link to comment
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