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  1. niamex

    SPDIF--->USB

    Hi there, I am reading the thread and trying to understand it nevertheless I am not a specialist - just music lover or something. Still I am very interested in the topic because at the moment I feed my DAC from a media player via SPDIF /BNC/ considering this type as the best jitterless...
  2. niamex

    MHDT Havana DAC

    Thanks a lot ! I hope he will become  a head-fier ! Cheers,  
  3. niamex

    MHDT Havana DAC

    Quote: I am sorry guys I am so busy with some other stuff and simply had forgotten this project /in the meantime I have already a grandson - DAVID/ so no sense to make any suggestions before I go back there - probably end of the summer. I live now at the seaside where I miss my audio rig...
  4. niamex

    MHDT Havana DAC

    Quote: I fully agree with this. I have tried plenty of resistors in that range and for me the best choice /compromise/  is 181 ohms.Please note again it's quality is very important - should be extremely low noise one. Cheers Cheers
  5. niamex

    MHDT Havana DAC

    Quote: I am glad you enjoy the upgrade ! Be good, Cheers
  6. niamex

    MHDT Havana DAC

      Quote:   As a matter of fact that was suggested earlier by someone in this thread - I went further and after the good result with 100 uF Elna Silmic I have installed one Elna 47 uF in parallel /from the bottom of the first one/ - so altogether 147 uF and in my case the picture got...
  7. niamex

    MHDT Havana DAC

    Quote: That's right and depends on the input impedance of next component in the system - preamp or whaever. In my case for example Chris VenHouse suggested 3,3 uF in order to get better /cleaner and deeper/ bass. Cheers,    
  8. niamex

    MHDT Havana DAC

    Quote: You are absolutely right to decide by yourself - just check here and there before final step. Michael Percy is a high end guru - http://www.percyaudio.com/Catalog.pdf  and he says - Soft Recovery (FRED) & Schottky Diodes "Fast Recovery Epitaxial Diode.The FRED soft recovery and...
  9. niamex

    MHDT Havana DAC

    Quote: They have too "engineering" sound -  the Korean L seem more musical   Quote: As far as I understood that project works for a penthode - we have a double triode tube ?   Quote: That is an example of the completely different approach and mentality ...
  10. niamex

    MHDT Havana DAC

    Quote:   Quote: Thanks ZenFire , I have registered to the Decware forums and will have a look at the topic tomorrow. The gain is you just avoid using the ****ty internal OpAmp and go for a passive I / V conversion which is let's say High End approach / what I know/ Attached...
  11. niamex

    MHDT Havana DAC

    Something like that - just principle schematics -   the old one   the new one      Please neglect the other parts and connections - I will send you the real schematics later - not completed yet, /All above info is absolutely not a military project as the Havana schematics -...
  12. niamex

    MHDT Havana DAC

    Quote: Easy, just have a good look at Robert,s posts concerning the PCM56 opamp and you will find out where to start /pin 13/. Will post a brief schematic where to go further. Cheers  
  13. niamex

    MHDT Havana DAC

    Quote: Sorry but I have several products at home of LINN, KENWOOD, HARMAN KARDON and I think these are not comparable with Lilliputs but all of them are providing very profound schematics and manuals. From another side you read on the MHDT website - http://dhost.info/mhdtlab/havana.htm -...
  14. niamex

    MHDT Havana DAC

    Quote: As soon as we work in close cooperation with Robert I will post my modest opinion which is based on my experience - 1. It is so long a story I wouldn't like to go across it again and again - pls read the thread. 2.Resistors shoud be audio note or even better shinkoh - tantalum...
  15. niamex

    MHDT Havana DAC

    Quote: I haven't decided yet for myself. First I have replaced it with a cheap 100 uf and there was a noticeable improvement as dinobot suggested. After I tried 220 uf but I couldn't hear an improvement - just the opposite IMHO. Let me listen some more time and let's see what is the...
  16. niamex

    MHDT Havana DAC

    Dynobot, I have found the bloody evil - 47 uf and imm changed it with some very ordinary 100 uf cap - UNBELIEVABLE Will go ahead and try some other values and finally install some quality cap there. Thanks for the good suggestion !
  17. niamex

    MHDT Havana DAC

    Quote: Generally speaking you need three transformers - one for the receiver part, one for the DAC's and one for the analogue part. .So there are three separate PS /now you have two/ - you have to add four hyper fast soft recovery diodes and two filtering caps. Additionally I have installed...
  18. niamex

    MHDT Havana DAC

    Quote: Hi, which one do you mean by next to C5 ?    
  19. niamex

    MHDT Havana DAC

    Hi Mois, I have warned you that the upgrading is an endless process , getting more and more costly but at the end of the day you have a feeling that something is improved..Frankly speaking I have already forgotten the original sound of the HAVANA so it doesn't matter anymore. Anyhow I will...
  20. [No title]

    [No title]

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  21. niamex

    MHDT Havana DAC

    Guys, I think something  is very wrong  around here. We are talking about music – not technical developments. Music is what matters and everything else is just computers,  oscilloscopes and whatever. You have to know that that dac chips, caps, resistors, connectors,  interconnects, power cords...
  22. niamex

    MHDT Havana DAC

    Quote: Absolutely right. First - there is no such an animal - a chip without a sign, Second - I have two matched pairs of brand new and unused PCM56P-K officially manufactured in Malaisia by BB and they have all the printings on them - year of production, number of the mfg line etc...
  23. niamex

    MHDT Havana DAC

    I think it matters very much. These are unknown products made somewhere sometime. They do not have even the sign of BB - forget it. Could be manufactured somewhere by order of TI but I do not believe it - I wander whether TI are producing something without a sign.
  24. niamex

    MHDT Havana DAC

    Sorry, even worse - the maximum values are  even 1 db less than I mentioned in my previous post - excuse me.
  25. niamex

    MHDT Havana DAC

    TOTAL HARMONIC DISTORTION VO = ±FS at f = 991Hz: PCM56P-K –94 –92 dB PCM56P-J –94 –88 dB    /92-88/ PCM56P, PCM56U –94 –82 dB   /88-82/ PCM56P-L –94 –80 dB  /     82-80/ VO = –20dB at f = 991Hz: PCM56P-K –75 –74 dB PCM56P-J –75 –68 dB  /74-68/ PCM56P, PCM56U –75 –68 dB  /74-68/...
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