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wushuliu

GDPR
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Everything posted by wushuliu

  1. 'go back where you came from'? Really? I've been a member since 2010. And just for the record. None of my posts have been personal attacks.
  2. Hi John, if possible can you also add an IBRA Cat7 ethernet cable as well as (based on lmitche's experience), the Gotham Audio cable he used? I'm sure some of us would be willing to send you samples if needed, since excellent results have been reported from all three.
  3. That's a hell of a strawman. I was 'doing' this tweak before it showed up here. Glad you got great results. Maybe you could have had better results. We won't know. Enjoy.
  4. Ok, well I was hoping at some point there would be attempts made to really compare and hashout cable choices and construction to get to the heart of this, but it's become more like a Choose Your Own Adventure and already stalling out. Too bad. This line of inquiry had real promise. Hopefully Swenson/Superdad will pursue this.
  5. It just says DC cables being used as DC, network for network, and that you've already converted a bunch of DC to Gotham. So it sounds like you're just using the Supra for ethernet?
  6. I meant in general. I have no idea what the specific specs are for either of those. Two LTs in series would only need ~2V drop.
  7. Excellent. Thanks! Re: LT3045, it's worth using two in series for improved performance.
  8. John Swenson Shield Guidelines "PS. For people not aware about the JSSG loop it is is simply a cable shield that is not connected to any of the plugs. Instead there is a drain wire loop that runs along the shield." - H/T Cornan Unfortunately, I can't find Swenson's original post/statement, so I'm not sure what else it involves.
  9. Did you compare the Supra directly to the Gotham? Maybe I missed that post.
  10. Yes, using an SD Card player pays big dividends with sound quality for the cost - especially once modded. Downside is the card readers are usually cheap and a little flimsy, and they have 32gb limitations. On ebay they are called 'Digital turntables' and that's pretty accurate in terms of inconvenience. But if that's not a deal-breaker and you have some basic soldering skills (to replace clocks and improve power supply), they sound really really good. Anyway, that's a bit off-topic isn't it?
  11. Wha? That doesn't even... Look. Metallica is not on Tidal. So I can't listen to Metallica lossless there. I can't listen to them lossless on Google. Deezer? Maybe, haven't checked. People talk about Tidal, but Deezer's not looking very reliable either financing-wise. So I can 'just download' them from magic ether place where all things wait for me, right? Where is that?... Oh, the Metallica website. Hmmm, my options sure seem to be thinning... but then, websites last forever, right? And that's just Metallica. And where can I stream the movie Truly, Madly, Deeply? Oh, right. I can't. I can pay $130 for the DVD though. I feel like I'm on head-fi.
  12. That's a whole lot of assumptions in those two sentences. Your music may not be my music.
  13. Really? I thought the model was to get enough subscribers and a brand presence large enough to get bought out for $$$$.
  14. There you go. And this applies to movies as well. Soooo many people hypnotized by convenience technology, they don't stop to think about the finite nature of rights, licensing, and yes, service. I am slowly stockpiling CDs because they cost only a few bucks now. Soon they will go through a resurgence, especially as titles go out of print or licensed to a specific service. We all know how this story goes, but we whistle past the graveyard.
  15. Since I guess we are now talking about actual ethernet use. re: Supra RJ45 connectors on ebay (US) Yes! We are currently out of stock - but a shipment from Sweden is due here any day now, The item will be listed on ebay by the end of the week.
  16. Glad to see you're ready now to try this tweak.
  17. Lol, Ebay Supra Cat8 stock almost depleted in less than 24hours.
  18. Here are the specs for the Supra: Technical Info Cable design Cable 4 pair, Cat 8 S/STP PIMF Lead area 0.23 / 26 mm2 / AWG Number of strands 7 pieces Lead material Bright drawn oxygen-free 5N copper Insulation Air-injected, low capacitance PE Inner shield Aluminium foil Outer shield Tin plated, oxygen-free 5N copper braid Jacket PE (FRHF) Outer dimension Ø 6 mm Flame retardancy Yes Electrical performance Resistance 145 Ohm / km Capacitance 43 pF / m Bandwidth 2,000 MHz Skew @ 100 MHz 5 / 100 ns / m Impedance 100 Ohm Velocity factor 0.8x C (speed of light) ---------------------------------------------------------------------------------------------------------------------------------------- Internal geometry doesn't seem all that different from the other round cables. However, one aspect to be considered is twist rate. The twist rate increases from Cat5 to Cat6 and presumably Cat7 and Cat8 in order to reach specified bandwidth: "The twist rate (also called pitch of the twist, usually defined in twists per metre) makes up part of the specification for a given type of cable. The greater the number of twists, the greater the attenuation of crosstalk. Where pairs are not twisted, as in most residential interior telephone wiring, one member of the pair may be closer to the source than the other, and thus exposed to slightly different induced EMF.Where twist rates are equal, the same conductors of different pairs may repeatedly lie next to each other, partially undoing the benefits of differential mode. For this reason it is commonly specified that, at least for cables containing small numbers of pairs, the twist rates must differ." Evidently the twist rate is unique from manufacturer to manufacturer and since Cat7 is so new, who knows what some of these companies are doing. I came across a pretty interesting discussion here: "There is no spec, on what pairs have a specific twist rate. A minimum twist rate is implied by the noise immunity required to meet the specification of the entire cable. But the rates on the individual pairs is manufacturer specific, and not dictated by the networking specifications. The networking specifications don't specify how the wire manufacturers perform the desired specs, they only specify what requirements are in place... dB of rejection on adjacent pairs, dB of rejection of adjacent cable, etc.Note that using a pair with a higher twist rate will give a higher noise immunity, but this does not necessarily result in a better picture when using balun's. This is because the higher twist rate also results in a higher capacitance for that pair. This can be modeled as each strand of the cable being a series string of low valued resistors, and the node between each resistor having a capacitor connected from one conductor to the other. (Looks like a ladder, with the sides being resistors, and the rungs being capacitors.)This model is a low pass filter! Above the corner frequency of the RC filter formed by the resistance of the conductor, and the capacitance of the twist, the cable looks like a short to high frequencies. So this twist reduces susceptibility to noise, but does so at the expense of bandwidth. These cables carefully balance the resistance, and capacitance in an effort to provide noise immunity while preserving as much bandwidth as possible, while keeping manufacturing cost reasonable. Like many things in life, this is a balance, and the best overall result is achieved by carefully balancing the behaviour, weighting the factors for what is typically seen in real applications." TL;DR - Twist rate increases as you go up, however it is manufacturer specific the exact rate and *which pairs* get what rate. Already I see reviews on Amazon of cables opened where the twist rate was not optimal. So this is a factor that could tie in the variation in results but nevertheless consistent as we go higher and higher (based on what we know so far).
  19. Mine arrived today as well. Thanks for the quick report. Sounds promising.
  20. I didn't see you mention having used any of those in this application, only the Monoprice.
  21. Why not just order an IBRA or UGreen (round) as well to have as the point of reference? Should get to you in the same time as the Supra and it's just a couple bucks. No one else has used Monoprice or the Supra in this application that I'm aware of.
  22. As a side note it came to me that the only other Ethernet cable I've come across with the same look, feel, and build quality of the Amazon is Blue Jeans Cable. And guess where BJC is located...
  23. Except in this case it seems that the poorer the CAT7 construction, the better the result.
  24. It may help to actually do what he did. Although interesting, you did something completely different.
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