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Soul Analogue

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  1. It depends on what you mean "sufficient"....even if the power drawn by the computer is higher than 5A...the choke core saturates and gets a hot ..... the ripple current cannot be controlled ..... but the PSU will still work if the voltage still within the operation voltage of the DC-ATX... if you are going to power the full CAS machine, I would definitely suggest at least a 10A choke... the lower DCR of higher current choke will give lower PSU impedance and hence better dynamics
  2. I saw Tatomek7 quote on Nenon's post dated 16 May "The second version (aka v2) consists of: IEC inlet --> Fuse --> Soft start --> Transformer --> Mosfet rectifier --> Hammond choke --> 3 x Mundorf HC 22,000 uF (each bypassed with VCAP ODAM 0.1 uF film cap) --> Output connector. This is an improvement over v1 in my opinion." this is a choke input (LC) filter and this thread developed with Hammond Chokes to be used in this kind of topology Thats why I was asking if anyone had tried that
  3. YES the L is the Choke But having a choke does not mean it is a Choke Input filter, which is a choke Right after Rectification, No capacitor in between CLC filter is still a Capacitor input filter..... Please differentiate these topologies....
  4. I think it is a film capacitor to bypass the 47000uf electrolytic Definitely not a choke
  5. It is a Capacitor Input CLC filter topology...the L does help on ripple reduction than Capacitor only filter
  6. Capacitors on the left ...which is right after the Recifier diodes = Capacitor Input filter.... Clearly NOT choke input filter that I mentioned above
  7. Yes...the server does not draw that much current constantly...but I think nobody would accept a PSU / hifi equipment rattles intermittently (during necessary loading times) When designing a PSU, always consider the max load, otherwise reliability issue will arise SGMS Extreme is only using capacitor input filter on the PSU.... so the requirement / spec on the choke is much relaxed
  8. 5mH choke for 10A current is not bad already
  9. May be ok.... the size looks more practical but as I said , the choke must be purposely built for LC application..I do not see it is mentioned in the Hammond datasheet
  10. I see so many of you are talking about choke input (LC) filter for taiko ATX module... but is there anyone really put into practice or a simple experiment? The taiko ATX can easily draw over 10A current at 30v... The choke for LC filter has to be purposely designed and substantially made (huge size) as it is dealing with all the AC ripple from the rectifier.... I am 100% sure that the 10A spec Hammond choke (just a mere 2kg) will not serve this purpose, or the choke will be as noisy as a chatterbox even under a 2A load In my experience, a choke built for this LC purpose nee
  11. So my improved AMD EPYC build has almost been completed.. This is a shot of discrete regulators inside the main chassis And a shot of the regulators under testing
  12. however in my experience.. the buffalo does not seem to boot up properly if the leds panel is off..... so it has to be on during boot up.... after boot up the panel can be turned on and off as desired
  13. One of the pins on the 10pin ribbon cable to the leds panel is the 3.3v supply to the panel .. use a dmm to locate that pin... Remove that supply male pin from the connector on the main switch board.. solder a wire from that pin to a “switch”.. solder another wire from the “switch” back to the leds panel 3.3v supply... Thats it
  14. Indeed on the buffalo, turning off the leds does sound substantially better than keeping them on... much less harshness and having more clear and holographic image so i purposely put a toggle switch to turn off the leds...
  15. been working slowly due to other projects.... Now almost complete the 13 rails Linear psu for the improved EPYC build A few eye candy shots to share... the 14 pin plug is a hell to work with... need to be very careful with the pin assignment 😅 and making the umbrilical cords takes some good efforts
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