Jump to content

Peter Avgeris

  • Posts

    122
  • Joined

  • Last visited

  • Country

    Canada

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. Thanks for the invitation. I wrote you, it may take between a moment and a lifetime to realize how bad is choke input for sound quality. I do not want to conflict with you. The differences I am talking about are relative. Switching between L input and C input, all else being same and equal, leads to straightforward results. I do not want to pressurize you, you do not need to do so. With kind regards Peter Avgeris PS: the web site is under construction, as photoshooting has not been completed yet.
  2. Without any intention to conflict your statements, it would be good to know that the choke input solution for designing power supplies is the most simple path you can follow on order to absolutely ruin the sound of your active stage. It may take you one minute, hour, day, year or whatever in order to realize that choke input design is your warranty to sound devastation.
  3. Hi there! I see that a lot of discussion still goes on, regarding the sound of the P/S chokes. What I would like to state is that chokes DO have a major influence on sound, besides of course the electrical characteristics. It is not possible for the end user to judge whether a choke has been properly designed or not. Contrary to what everybody here thinks, the influence has little to do with the current/amperage requirements/capabilities. Vast majority of its contribution relates to a myriad of parameters that are taken into consideration at an early stage, when the choke is designed. You cannot infer anything by just plugging and measuring. E.g. the behavior in the frequency domain is so critical, the behavior under different loading conditions, the excitation of the ferromagnetic material, the composition of the ferromagnetic material itself, the tempering of the alloy... I have been designing and manufacturing chokes (and amps in general) for the most demanding audio aficionados and know very well what I'm writing here. Try not to spend a fortune on chokes like this, as they are mostly badly designed/executed. Just plain 'n cheap solutions is the safest all-around way to go. Just my two cents...
  4. I would highly recommend to avoid those ultra expensive Furutech connectors/plugs/sockets. All Furutech products have been cryogenically treated and unfortunately they impose a very bad sonic signature compared to the non-cryo versions. I used to purchase Wattgate & Furutech products many years ago, before this cryo treating policy was applied to the whole array of their products. Nowadays, cryo treatment has become a standard and this is really bad for good sound. In addition, I have never ever listened to any Vcap capacitor that sounds really good. On the contrary, they are sterile and thin sounding. Last, bypassing electrolytes does not make things better. A good measuring electrolyte like Siemens or Nichicon with its characteristic angle as close to -90 as possible (at 100 Hz) has way better behavior than the one of the Mundorfs, which have been found to be unreasonably expensive. Putting all these down, leads to cost cutting well below 40%.
  5. When I needed a gpu just to power up the machine, I got probably the best of all! https://www.ebay.com/itm/184695102850 I got this because the motherboard I was using did not boot without a GPU. I compared it against 5-6 modem graphics adapters and it was clearly better most likely due to the simplicity of the design. It had virtually nothing on it and the power consumption was negligible. When I changed the motherboard to a server motherboard, that was able to boot, this card became useless.
  6. Hello again! Most likely, my friend in Germany is in the same state like you. He has been waiting for the RAM chips for quite some time now. He has sent me the board & the CPUS along with a pair of DDR4 DIMMs but they are not RDIMMs and they do not work. It seems that this MoBo requires only RDIMM chips to work. There is no need to worry for all this unwanted situation, he will send me the chips immediately after they are in his hands. But this may take quite long. I will call him now and will ask him about the estimated date of delivery, if this is scheduled months from now, then I will be looking for your help. Stay tuned. Thanx, Peter
  7. The thread is still active. My problem is that although I have the MoBo & the processors in my hands, I can't power up the boards because the RAM chips I have are incompatible. I am waiting for the new chips for months so as to be able to power it up.
  8. View Classified Buffalo BS-GS2008 Here there are four identical Network switches from Buffalo. It is a discontinued model. I purchased these four pieces for a local friend, when they were still available. On top of selling price I paid shipping and import duties/taxes but now he has cancelled the project. I already have my own pieces, so I'm giving these out to the lucky one. Due to the fact that you never know if the machines are working perfectly, although being purchased as new items, I decided to test them one by one in my own lab. This is the model that comes with its own external power supply. I am giving them out at the price of the original cost including shipping and European taxes/imports. Sale price is 500 Euros for all four pieces. I will ship them free inside European Union. For shipments outside EU, shipping fees will be covered by the buyer. I can accept wire transfer and PayPal payments. PayPal fees are calculated on buyer's side. Feel free to ask for information at [email protected] Seller Peter Avgeris Date 07/24/20 Price 580.00 USD Category Computers / Networking Gear
  9. This listing is completed.

    • FOR SALE
    • NEW

    Here there are four identical Network switches from Buffalo. It is a discontinued model. I purchased these four pieces for a local friend, when they were still available. On top of selling price I paid shipping and import duties/taxes but now he has cancelled the project. I already have my own pieces, so I'm giving these out to the lucky one. Due to the fact that you never know if the machines are working perfectly, although being purchased as new items, I decided to test them one by one in my own lab. This is the model that comes with its own external power supply. I am giving them out at the price of the original cost including shipping and European taxes/imports. Sale price is 500 Euros for all four pieces. I will ship them free inside European Union. For shipments outside EU, shipping fees will be covered by the buyer. I can accept wire transfer and PayPal payments. PayPal fees are calculated on buyer's side. Feel free to ask for information at [email protected]

    580.00 USD

  10. It is exactly like replacing other components. Each and every module seems to behave on its own, regarding SQ. I am not very experienced in these modules as I'm not using any fiber isolation devices in my audio chain.
  11. Yes! Flat cooper heat pipes is an interesting solution that could be beneficial in the way that we can avoid digging groves onto the lateral heatsinks. Big heat pipes are required for sure. Taiko Audio has used copper heat sink for both CPUs. Aluminum heat sink requires increased dissipation area between copper and aluminum structure. Let's wait for a couple of days more. The RAM chips are on their [email protected], thank you for your willingness to help. I think the ones supplied are already checked that they are fully functional.
  12. Hello from Athens, Greece. I have been reading your comments with utmost interest. In brief, a depth of 1-2 mm of the grooves is absolutely insufficient. Due to the incompatibility of current RAM chips I have, I cannot use them for powering up the server board with the Intel Xeon CPUs. As soon as I am able to power up, I can measure the current drawn through these specific CPUs and IMHO this is one of the most important aspects that, among others, affect the calculations and the design of the chassis. I am waiting to receive the compatible RDIMMs from Germany and next step is the fine tuning of the server board. Tuning has great impact on power consumption. Each and every aspect is interconnected to the other. So, I think we need to step aside from everything until I have the exact power figures handy and then make the first move. As a preliminary assumption, I am expecting not to be able to avoid using the German Junior / Fischer heat sinks. Whenever I'm thinking of heat sinks my mind always go to Junior/Fischer.
  13. Yes. It is active. But first I need to have in my hands the Ram chips to power up the beast! This is what I have been waiting for...
  14. Hello! Yes, I forgot to let you know. Along with the Buffalos I had listened to the Ubiquiti router(s) as a plain switch(es). Nenon had written the day before. He had listened to this thing. Buffalo switches are a totally different story. They play miles better than Ubiquitis. It seems that Ubiquiti is the best choice for routers and Buffalo the best for switches. Imaging was far bigger with Buffalos, low & high frequencies were shockingly real. Ubiquiti was sounding a lot more harsh against Buffalos. I have observed that the comments of Nenon are always in line with my own findings. He has gone through the path previously than me, so he already knows. It is a real pity that Buffalos are discontinued and not available any more. Go and get as many as you can, although I guess that the last pieces have already been completely vanished from the market. Either 8- or 16- or 24- ports, go grab them at any price. In quad version they offer a stratospheric sound quality. Last choice could be the commercial version of Melco although at a much increased price.
  15. Yes! BS-GS2008, 16 & 24 all make use of the same chips inside. I have checked the specs on Broadcom site, only difference is support for 8,16 & 24 ports respectively. All have same sound quality, character and flavor. Checked 2008 vs original Melco. In earlier posts, the 16 port has been evaluated against Melco. Melco has some shortcomings and advantages against Buffalos. Melcos are powered externally so you can directly connect LPS without extra mods. The shortcoming is that I have been told (do not know if it is 100% true) that you cannot disable the unused ports which according to my listenings and some comments on this thread, does make a positive difference. 2008 accepts directly LPS without extra mods while 2016 & 2024 do require mods to be powered externally with LPS. Regarding SQ wise, I do not expect any serious differences to occur. For absolute best sonics you should go for the 2008 version with external LPS because it is the most cost effective and most minimal. Now, if you have soldering skills, you are maniac for best sound and can manipulate the p/s section inside 2016 or 2024, you should go for them because you have more space inside for mods and clocks replacement. This is not convenient to be done inside 2008 and increased space will make your life easier. You should know that 2 pairs (4 units) of any of 2008, 2016 or 2024, stacked one upon the other will lift your sound quality to stratospheric levels. You should avoid using 1 or 3 units. The quad lifts the SQ to uncharted territories, all have been evaluated in 2 systems with both SMPS & professionally built LPS. Results were noted straightforward without the slightest hesitation in less than 5 seconds of critical listening. All serial switches need to be connected on the same ports. Pay attention : Switch #1: input port 2, output port 1 Switch #2: input port 1, output port 2 Switch #3: input port 2, output port 1 Switch #4: input port 1, output port 2 5 switches were worse than 4, while 6 did not have any positive impact at all. Hope my comment helps a bit.
×
×
  • Create New...