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About seatrope

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  1. seatrope

    HQ Player

    What can’t you believe? I am giving you direct personal experiences and you say you can’t believe me. read my previous post carefully. Once again, I can run 44.1 to dsd512x44.1 without stuttering, with xtr NON-2s. Same with pcm 48khz to dsd512x48khz with xtr NON-2s. I cannot do pcm 44.1 to dsd512x48khz with a 1950x.
  2. seatrope

    HQ Player

    There is no cpu present which is capable of pcm44.1 to 48khz x dsd512 with xtr non-2s filters. I have a TR 1950X which works smoothly for auto rate family dsd512, ie 44,1khz goes to dsd512x44.1, pcm 48khz goes to dsd512x48khz. @louisxiawei has a 18 core i9-7980xe which will also not do 44.1 pcm to dsd512x48khz.
  3. So I checked connectivity today on my topaz. The shield seems to be in continuity with the chassis, as well as in continuity through its primary and secondary shield wires. Measuring across all these points gives a resistance too low to measure. Im guessing that’s why there is no chassis ground point, as the shield appears to be already bonded to chassis?
  4. @One and a half thank you for your EXTENSIVE input. Much appreciated. Just to reiterate, so I understand: 1. The shield wires (green) are not in continuity with the chassis. 2. I need to make a direct chassis/frame connection by drilling a hole and connecting a wire. - why was this not done from topaz? Were they expecting everyone to do this? Curious. 3. If I have metal armored wire coming into the topaz, with a connection between the armor and the bare metal of the topaz case, the armor should be grounded to the ground wire of the metal armored cable. Do I need to make another hole for the chassis ground? 4. If you look at @JohnSwenson diagram and explanation I quoted above, he says that by the diagram, the safety ground of the secondary is connected to the center tap of the xformer. This does not jive in my mind with the scheme you have explained. Thanks!! yeang
  5. Hi John, Thanks so much for your input. Understand the idea of how your setup is grounded, but when you say "safety ground wire of primary connected to safety ground of secondary" above, how is that practically achieved? Do you run a separate ground wire outside of the chassis from the incoming input wire, and connect that to the ground wire of the secondary wiring? Or do you utilize the green wire built in inside the transformer? I was under the impression that the neutral on the output/secondary side had to be bonded to ground, as per @One and a half's diagram. But your post seems to indicate otherwise. Yeang
  6. @One and a half thanks for the great diagram with labels. However, on my unit there is no S1/S2 - maybe that is your way of indicating the shield connection. Questions: 1. Is the Faraday shield in continuity with the transformer frame/chassis ground? 2. Any differences in grounding of the secondary, if we do 240V balanced input? I proposed 240V input to my electrician, and he said this "As for tapping the transformer at 240v on the primary and 120v on the secondary, depending on the transformer, we may end up with a floating neutral on the secondary that would have to be bonded to the frame of the transformer. I don't know if that would be a problem for use." I had assumed that the secondary neutral was always bonded to the frame, even in a 120V in, 120V out situation. Is that not correct? 3. Photos of my unit attached below. On the output side, there is a "GND" terminal but not on the input side. Seems that the green wire on the input side is connected to some metal shield, but the green wire on the output side just dives into the depths of the transformer. 4. Working assumption - green wire on input side wire-nutted to the incoming ground wire going back to main breaker panel. On secondary/output side, jumper X4 and GND terminals. Keep the green wire going into the GND terminal. Correct? @Superdad @JohnSwenson and @Speedskater @Johnseye any advice would be appreciate too. This is for a 240V input, 120V output, nonbalanced output setup. Quite unsure of the grounding situation here. Thanks so much again!
  7. Thanks much guys, not dead yet. Powered it up with a killawatt on the source outlet. 121V in, 123V out no load, pulls 57 W by the meter (1.8A). Less that I had feared, for a 5kva. 18awg cord cool to the touch, but just ran it for 5 minutes with some hum from the xformer.
  8. Yes I do have a killawatt. I’ll keep that plugged in on the source side. Ill see see if there are any 14awg handy.
  9. Question to all you electrically savvy people, including @One and a half @Speedskater @Superdad : I’m getting ready to do live 120V testing of my Topaz, after passing all tests with insulation tester (>1Mohm which is the limit of my cheap tester). I cut a 18 AWG power cord and was just planning to wire it to the terminals of the topaz (mine are bare terminals only), just to test output voltage, without any load or just minimal load with something expendable after I confirm correct voltage. I assume that even though the xformer is 5kVa, if there’s no load on it, it’s ok to have a thin 18 gauge power cord on it? Or will it attempt to pull enough current to melt the 18awg power cord? need some reassurance before I blow up anything... thanks!!
  10. seatrope

    Roon + HQPlayer server (fanless, if possible)

    Hi @sbenyo, agree with your findings 100%. I have a 1950x threadripper setup, and auto rate Family with multi core grayed plays all upsampled DSD512, including xtr, without any issues. As you note note I cannot do 44.1khz to dsd512x48 xtr, hqp gets pinned to 100%.
  11. Hi guys, @Superdad, @One and a half, @Speedskater @Johnseye and @Jud, apologies if I forgot anyone, HUGE thanks for all the guidance and advice. Sorry I was missing from the thread for a bit, several late nights/early mornings at the hospital for emergencies (I'm a physician) have me beat. @Johnseye you have hit the nail on the head. The diagram does not explain how to attach the ground wires on the input and output side. I'm going to devote a few hours tonight in trying to figure out how things should be connected, but if anyone has a photo (maybe @Superdad or @One and a half, perhaps superdad's USA setup would be more relevant?) that would be hugely appreciated!! The X1-4 and H1-4 parts are pretty self-explanatory, I hope. I plan on following Gary's guide from Headfi on testing, just had a insulation tester delivered today! Thanks so much to all of you, once again. Yeang
  12. @Speedskater I read the middle Atlantic white paper. Very useful but still not quite sure how to translate that into concrete directions wiring the Topaz ground wires. @JohnSwenson thanks for chiming in. Much appreciated! Can you shed some light on the actual connection configuration of your Topaz? I see your description above but am not sure how that translates for configuration if the ground wire on the input and outputs of the Topaz. do you have 240V input to your Topaz, John? If you could, would you choose to do so? many thanks to you both for sharing your knowledge!
  13. Thanks much guys @One and a half and @Superdad MC 10/2 is 10 gauge metallic sheathed Cable with 2 conductors and a separate insulated ground, the more updated version of BX (US terminology). Ok I’ll ask for 240v in. That’s also balanced wrt the two legs of the household supply. Can anyone comment on how much potential code violation there is doing a balanced 60-0-60 output? also, @One and a half, how did you have the ground connections set up at input and output? thank you guys so much!
  14. Read and tried to understand the information here: http://www.ecmweb.com/bonding-amp-grounding/basics-bonding-and-grounding-transformers regarding bonding and grounding SDS, but not sure how this will be implemented with our Topazes. How many of us using ITs have them as truly Separately Derived Systems?