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elan120

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  1. When it comes to linear power supply in the 5V/1A range, the choices are many, it really depend on what your budget is and how good the quality you want to get. As far as your other question : The formula to calculate the power, which is measure in watts, is "P = V x I", so when looking at the 5V/1A spec, wattage is 5(V) x 1(A) = 5W(atts).
  2. That will depend on whether your DAC require the 5V from USB to make the handshake or not. Most of the DACs do require having 5V be present to work, and this is not the same where USB cable needs to plug into an AC receptacle via an AC plug.
  3. Looks like trying to update from "new killed filter" to "new killer filter"... 😇
  4. Understood clearly now. SMD components removal can be a lot of pain, I normally use hot tweezer for that to lessen the pain. Below is a quick shot of clock replacements I did short while ago that the original clocks were Crystek 575's.
  5. The modification look very nice @Neno, and if you end up having one you no longer want to keep, I will take it to do some tweaking. What is the difficulty involved in removing the stock clock? Regards, Kevin
  6. Might want to check with Pink Faun to see if the physical size of their Ultra Clock will fit inside the existing eR case. Their Ultra OXCO oven case plus PCB is >21mm, and eR external case height is 30mm.
  7. Same here, it is always delightful chatting with you. With your BS-GU2016P coming, you really open up lots of combination to tinker with...😊 In addition to the configuration you stated, I would try the following as well to see if you have a preference: Router > 1 meter ethernet > Buffalo switch > 5 meter fibre > ER > 1 meter ethernet > Zenith Router > 1 meter ethernet > OM > 5 meter fibre > Buffalo switch > 1 meter ethernet > ER > 1 meter ethernet > Zenith Router > 1 meter ethernet > OM > 5 meter fibre > Buffalo switch > 5 meter fiber > ER > 1 meter ethernet > Zenith Finisar is one SFP I also plan to try once I am done with my power supply project. I also read many praises on WBF, and looks like it is going to be system and personal choice between Finisar and Planet. Regards, Kevin
  8. My current setup is similar to the "B" option, but instead of using two OM, I use one between the switch and eR as follows: Router > ethernet > XOCO clocked switch > 8M optical > Sonore Optical Module > ethernet > eR In addition, using Planet MGB-TLX SFP also moved the SQ up a bit. As a comparison, I started with just Router > ethernet > eR, liked the result, but later when added the XOCO clocked switch eR replaced in series, I was delighted to find SQ took a good step forward, so it stayed, and the addition of OM some time later brought another step forward in SQ.
  9. Sounds like a plan...will do that after some burn-in time.
  10. Finally received all the parts needed to build the ATX power supply couple weeks ago, and while building the power supply, I also divert to work on few cables to connect the power supplies to the server. Below is more of an update on what I did with the ATX power supply build rather than detailed build process since most of the build process is similar to the EPS power supply. This ATX power supply will have a total of 4 rails, where 3 of them will be used for ATX connection, the 4th rail will be used to power the JCAT Net Card Femto. As a side note, the 4 Sean Jacobs regulator modules and the 2 ReCap modules are upgraded models, both ReCap modules are installed with Mundorf capacitors, and all wires used in this build is Moundorf solid core silver. The first step is getting all the metal work done, and the process is exactly the same as before. Here is the end result right before assemble key components. Next is having assemble all key components, but instead of leaving the transformer until the end, due to wiring from transformer secondary to pre-filter boards are space limited, it is decided to install the transformer in the beginning. Picture below show all 4 Sean Jacobs regulator modules, 2 Sean Jacobs ReCap modules (4 channels total), and a 400VA Toroidy Supreme Audio Grade transformer installed and secondary wires soldered to the 2 ReCap modules. With the transformer secondary wiring done, it is time to solder outputs from ReCap modules to the four regulator modules. On this build, I decided to add a 0.01uF MLCC bypass capacitor to the output connector for the JCAT Net Card. Before connecting output wires from the regulator modules, I close up the rear panel and soldered transformer primary wires to the power entry module. In this step, it is essential to stress the importance of connecting IEC power input ground to power supply chassis as a safety precaution. This is a simple step to add in the build, but often seen omitted in commercial power supplies. Below are two pictures showing how this power supply is done, where the first picture is the pigtail connected to the chassis, and the second picture show this wire soldered along with transformer primary wires to the power entry module. With the power entry wiring completed, the remaining wiring would be soldering wires from regulator modules to the two output connectors. Here are pictures showing completed left side wiring. Here are pictures with all output wires completed. Now with the wiring job completed, time to install the front panel, power up the supply using the same procedure described previously, measure adjust output voltages under load, and more pictures showing completed ATX power supply. This is the final episode of both EPS and ATX power supply build. It was a very fun project and I hope it was helpful sharing the details here. If you decided to build a power supply, please share some pictures here. For anyone interested in cable building, I post one of the cables build for this server here.
  11. I have never seen a baseboard this clean behind the rack...very impressive. Looking forward to more of your listening impressions when you have additional time on this new toy.
  12. Based on my recent experience, I have a hunch the SQ will take a sizeable step up when the EPS gets fed by a greater quality power supply and quality cables as you continue to upgrade. Enjoy, there is going to be lots fun ahead...
  13. FWIW...this is a mod I did some time ago, hopefully be a help in case you want to set up an external power. Version one mod with Gotham cable setup in JSSG360 shielding Version two mod with AS solid core silver wires in JSSG360 shielding
  14. One of the key is efficiency, and it is calculated as: Output power Efficiency = ------------------------ Input power Using an example, if the power supply has 50% efficiency and the requested load power is 100W, then the total input power required to provide this 100W of output would be 200W. The other 50% of input power (100W) is wasted, and most of this wasted power will become heat that has to be dissipated. Better linear power supply will have better efficiency, design, parts, and workmanship so they will run at lower temperature. Meanwhile, power supply will run hotter when pushing closer to the upper limit of their output. In general, there are many possible factors that could drive a power supply to run hot, and when the power supply gets too hot, it could affect their overall service life. Hope this helps a bit...
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