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ontherocks

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  1. sorry, I forgot the link of the building process: $677 wifi music server or my minimalist C.A.P.S. v2.0 build
  2. I want to change the motherboard by a newer generation one NOT upgrade parts like RAM...
  3. Thanks that's exactly what I want to know! The case was Origen AE Technology M10 computer case: Origen AE Technology - M10 HTPC Enclosure http://www.origenae.com/downloads/brochures/m10.pdf with dimensions so mini ITX it says. In the process of having it built many things were removed or not used: no fan (and it has to stay like this), no spinning disc, ... I found some pictures from the building process but slightly different from my case (no CD drive), it helps to get an idea of the space available
  4. Hello, I have CAPSv2 with tX-USB PCI card with twoUSB output from which I plug a dual-conduit USB cable from acoustic revive to sonicweld HR diverter to metrum acoustics NOS octave DAC. These are products from 2011. I would like to limit new cash expenses but to have more power for the music server. I would like to find a new motherboard fitting in the case but with at least 8G0 RAM instead of 4 now + more powerful processor (ideally i5) and with half height PCI card allowance (I want to keep the sotm usb card with dual usb output and dedicated usb rail). Any help welcome Richard
  5. Hello Ted, I am late on this post sorry I found an article from srajan on 6moons about sotM mBPS-d2s with a reader commenting on it and mentionning CAPS2+. I was curious and checked on the web and found your post on it. That's how I identified you. I have a CAPS2 with sotm USB PCI card and was contempling adding either a paul hynes SR3 12V 2A for powering it or a battery from a canadian company . I am interested your feedback regarding using the SR3 for your sotm PCIe card (even if it is 9V) AND your experience feedback using SR7 for the CAPS motherboard. Would be helpful before ordering best regards Richard
  6. Demian, The more I know... To fully understand: a) "External to the motherboard is less likely to be an issue. If it has a separate power connector then it should not matter which sequence the power comes up in. The internal supplies are controlled by the bios": In my case i plan to use for the caps2 an external power supply from paul hynes, one case, one mains transformer and 4 separate fully regulated rails (see above post)for the SSD, the MoBo (which has a P4 Molex power connector), the SOtM USB card and may be the RAM. The umbilical will go through the caps2 chassis directly to the components to be supplied and molex connectors on the MoBo and USBcard will be removed (hard wiring). In that case should i understand power ignition sequence is not an issue and no change in the BIOS is needed? Please help! b) "The larger question is why use the linear regulator?" For all the reasons you mention + in addition I use separate rails for the music server main components to eradicate ground return current inter-modulation caused by powering more than one circuit from the same power supply. Excerpt from paul Hynes circle: Up to four fully regulated supply rails can be fitted depending on the voltage/current requirements of the equipment to be powered. The supplies have their own separate secondary windings on the high performance custom mains transformer for complete galvanic isolation from each other. This eradicates any ground return current inter-modulation caused by powering more than one circuit from the same power supply, giving a more stable musical presentation both dynamically and dimensionally and it also reduces the masking of low level information caused by the mixing of these ground return currents with a common supply. c)"There are valid reasons for a liner supply, however it should be used intelligently" Regardless of cost/benefit efficiency ( I am already commited...) is there anything in what i plan to do which i should avoid or lead to inferior SQ? Please note that I have an isolation transformer inside the paul hynes PSU as well. d)"you are trading noise for noise": you speak of the 60 120Hz hum?, where does this comes from and does it affect all linear psu or only the off the shelves ones? Any way to avoid, mitigate it?
  7. To Demian: The idea of powering separately the RAM came from this thread: http://db.audioasylum.com/mhtml/m.html?forum=pcaudio&n=98778&highlight=memory+power+supply&search_url=%2Fcgi%2Fsearch.mpl%3Fsearchtext%3Daudiogon%26b%3DAND%26topic%3D%26topics_only%3DN%26author%3D%26date1%3D%26date2%3D%26slowmessage%3D%26sort%3Dscore%26sortOrder%3DDESC%26forum%3Dgeneral thanks for your informative post, a few questions: a) "Powering the RAM is difficult because its low voltage high current under Bios control": a-1)SSD and SOtM USB card are also under BIOS control? a-2) for the RAM what implications with regards to BIOS adjustment if you plan for a separate remote PS or rail? b)"The supply sequencing is also not a minor issue. many parts could get fried if the supplies are not brought up (and down) in the right sequence" Even if i dont pursue the goal of having a separate rail for the RAM are there any supply sequencing issues for separate rails for the MoBo, the SSD and the USB card used in the caps2? And how to cope with that operationnaly? c) "The noise reduction from the remote supply may be swamped by the noise radiated across the long cables." Seems to be a good point but what if you shield properly the supply wires? A local shunt regulator is not possible because of the current requirements of the RAM. The SSD seems has low enough currents requirements enabling the use of a shunt regulator , what do you think of the idea? Generally speaking shunt is preferred over series regulator and in that case this shunt reg from paul hynes has noise rejection up to 1GHz suitable i guess for digital compared to his series hi power modules which are limited a a few hundred KHz from memory
  8. itemaudio: the starting point is a SR7EHD with a 400VA mains transformer which can accomodate up to 4 separate rails. I planned initially to use 3rails for the 12V motherboard, the 5V ssd and the 12V usb card. I sent to him the currents requirements and voltage tolerances of these devices that i found. but since there is an additional available rail i am thinking to use it to power the DDR2 memory as well, i have read posts on computeraudioasylum of people doing so. I still dont know the current requirements of the RAM nor the voltage nor how to do that. I have to finalize the specifications with him and just sent my caps2 to him. Any advice much welcome! Concerning the regulators to be used it will be his hipower PR3iEHD except for the SSD for which the use of a shunt SR3 regulator is planned. I will have customized regulator modules using Z foil SM resistors and elna silmic 2 caps. What do you think of the approach? Concerning connectors it will use industrial Jaeger connector on the psu and no connector on the music servor with hardwiring on the circuit boards except for the ssd. Internal wiring on psu music server and umbilical will be silver solid core with rfi rejecting braiding geometry. Another psu will be made later for my metrum acoustice dac octave (it happens Paul Hynes has just ordered one for his system) and a esata HDD.
  9. This is such a wonderful forum especially when you get answers.<br /> <br /> To the folks who built a CAPS2 and more...<br /> <br /> a) Has anyone tried to have separate power supplies (at least rails)not only for the USB card, the SSD and the motherboard BUT also for the memory DDR2??? The new Paul Hynes supply SR7EHD I want to order has a 400VA mains transformer which can accomodate up to 4 secondary rails. Is there any BIOS optimization involved, in particular for firing sequence? Where could i find good info on BIOS optimization in general in the context of the CAPS2 ?<br /> <br /> b) I am thinking of having the SOtM products (USB card, SATA filter)upgraded (better regulators, caps, resistors like SM Zfoils, clock and its supply (for the usb card)). Any experience? Any idea on which omponents are being used on these 2 products?<br /> <br /> For those interested by having separate power supplies for the CAPS2 I could post the current requirements and voltage tolerances of each part (MoBo, SoTM, SSD)
  10. hello windowsX i am interested in the mods you have done to the motherboard can you suggest some pists of improvment? I finished building a caps2 with a paul hynes linear power supply with separate rails for the mobo the ssd and the usb card (yet to be built)
  11. what kind of adjustments have you to make if you use separate supply rails to power the mobo, the ssd and the usb card respectively?
  12. Thanks Dallasjustice for this information, would be nice to know the needed gages for these wires.<br /> <br /> More generally, i am interested to know about options to tweak the CAPS2 (beyond power supply issues already well developped). I read in Chris Conneker description of the CAPS2 that he says "I currently enjoy a highly tweaked C.A.P.S. v2.0 server". Would be great to have ideas on possible upgrades!<br /> <br /> On my part i was planning to upgrade the wires and to use ByBees slipstreams on the Paul Hynes linear PSU IEC plugs, and ERS paper (Stillpoint) for some components of the music server.<br /> can any upgrades couldbe performed on the sotm products as well like better caps, regulators or clock?<br /> any experience of cryotreatment of the PCBs?<br />
  13. itemaudio I am interested by your approach regarding a treated, shielded SATA cable. Can you tell more about it? thanks Richard
  14. Sandisk, How can I try to power a USB flash drive with a 5V linear psu?? Any receipe??? Richard
  15. Hello Peter, Could you please develop: "SSD easily masks other things wrong" Richard
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