jkeny
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Post by jkeny on Mar 15, 2013 1:52:16 GMT
Just to put the cat among the cuckoos , tonight I was in a friends house who had borrowed a Zuma PC - you know the PC configured on CA. It was using Win 8 & Jplay into my DACs via the ordinary USB port & not the SOTM USB port. The sound was richer harmonically in all areas & made both our laptops also running Win 8 & Jplay anaemic, by comparison. Alex, it made me wonder about using a JLH to clean up the power inside a computer. Is it powerful enough to handle the watts or can it be scaled up or multiple ones used? Has this been done before? I know that it might just be cleaner power to the USB port that might be the crucial factor but I don't want to try to isolate this so that it can be supplied independently.
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Deleted
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Post by Deleted on Mar 15, 2013 2:04:38 GMT
Correct. I live in Mt Kuring-gai not Cukoo land. BTW, old "Cloth Ears", Cukoo is spelled as "cuckoo" I typed it correctly but the "c" was lost over the Ethernet, a bad router somewhere. BTW, OC, you should have a full stop at the end of a sentence.
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jkeny
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Post by jkeny on Mar 15, 2013 2:13:53 GMT
BTW, OC, you should have a full stop at the end of a sentence. Not if the sentence ends in a but - it would be grammatically incorrect.
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Deleted
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Post by Deleted on Mar 15, 2013 2:29:24 GMT
Just to put the cat among the cuckoos , tonight I was in a friends house who had borrowed a Zuma PC - you know the PC configured on CA. It was using Win 8 & Jplay into my DACs via the ordinary USB port & not the SOTM USB port. The sound was richer harmonically in all areas & made both our laptops also running Win 8 & Jplay anaemic, by comparison. Alex, it made me wonder about using a JLH to clean up the power inside a computer. Is it powerful enough to handle the watts or can it be scaled up or multiple ones used? Has this been done before? I know that it might just be cleaner power to the USB port that might be the crucial factor but I don't want to try to isolate this so that it can be supplied independently. Hi John I got into trouble a while back in C.A. for suggesting that the earlier SOtM card's output capacitors were far too low in value due to SMD constraints, and would tend to exaggerate HF. I wouldn't try pushing the JLH past 2A , and you would need to use a relay with a PW5 series resistor to protect it at start up. This is what I have done with power for my internal LG BR writer. You will find it in one of the threads. You could probably also use another one to feed a couple of HDDs/SSDs with cleaner power. In my previous P.C. I also used a C-L-C filter to supply my "C" and " G" drives. The total capacitance at the output was almost 10,000uF. AndrewT. once suggested that it may be possible to upscale the JLH using power devices, but you would also need to markedly increase the available standby current used for modulation purposes. Kind Regards Alex
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jkeny
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Post by jkeny on Mar 15, 2013 2:47:56 GMT
Thanks Alex
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Post by Deleted on Mar 15, 2013 20:19:39 GMT
John The thought crossed my mind, that if you were to use 2 as in the attached photo, on different feeds from the SMPS, e.g. one for optical drive, and another for a couple of HDD/SSD , provided that it was of the type that had a single large +12V supply, then it may very well improve the supply to the Motherboard a bit too. You would need to see before and after using a CRO to verify this. Kind Regards Alex P.S. The JLH can use a single relay on the +12V output of the JLH to protect both +12V and +5V at startup.
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jkeny
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Post by jkeny on Mar 15, 2013 22:43:18 GMT
Thanks Alex, it looks like it may be well worth following this up? Any JLH boards available anywhere?
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Post by Deleted on Mar 15, 2013 23:27:22 GMT
John One way of doing this. Regards Alex
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jkeny
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Post by jkeny on Mar 15, 2013 23:37:00 GMT
So you have done this on your drives? What was the sonic result?
I'm wondering if a JLH is an overkill for this or would some chokes & maybe gyrator be sufficient - after all ultra low ripple is not required here as it will be feeding some on-board switching converters?
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Post by Deleted on Mar 15, 2013 23:48:45 GMT
So you have done this on your drives? What was the sonic result? John I have transferred the JLH as in the photo to my new PC for the LG BR writer, and there are many RG members who can vouch for the difference it makes with the SQ of CD rips. Previously I was using a C-L-C filter in line with the 2 main HDDs in my old P.C.(mainly for the OS) and it also made a further small improvement when ripping. Martin Colloms also verified the improvement when this C-L-C filter was used in line with the LG BR writer some time back. He actually reported audible improvements via both the C-L-C filter and the JLH filter methods,and could identify differences between all 3 versions. When, I get motivated enough, I will make an additional JLH supply for either the 2 main HDDs, or perhaps just for the Asus Xonar D2X auxiliary supply, but this time with just a 12V relay for startup protection.. Regards Alex
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