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Post by ponczomarinero on Mar 7, 2016 0:32:06 GMT
Hello
Just thought it would be nice to build decent linear power supply for project sunrise II. Just read somewhere LM317 based stuff doesn't improve so much SQ. Shunt regulators usually have max current below 0.5A. As far I know amplifier needs something like 650 mA maybe even more considering some demanding headphones. Using Project Sunrise with Hifiman HE-400i - it sounds lovely but think such good amplifier deserve better PSU. Not so much information in internet to find about it. Maybe someone seen some good circuit?
Matt
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Post by Deleted on Mar 7, 2016 0:46:35 GMT
Hello Just thought it would be nice to build decent linear power supply for project sunrise II. Just read somewhere LM317 based stuff doesn't improve so much SQ. Shunt regulators usually have max current below 0.5A. As far I know amplifier needs something like 650 mA maybe even more considering some demanding headphones. Using Project Sunrise with Hifiman HE-400i - it sounds lovely but think such good amplifier deserve better PSU. Not so much information in internet to find about it. Maybe someone seen some good circuit? Matt Matt Have you asked Frans for advice on this, as Frans designed this H.A. ? A DIY John Linsley Hood designed PSU add-on could be used after a 24V 1A PSU, but these PCBs aren't presently available. If you are able to etch your own PCB from a PCB pattern, that would be a different matter.
Alex
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Post by ponczomarinero on Mar 7, 2016 1:04:52 GMT
Thanx Alex
Didn't ask yet... just thought I am not first who is asking about it and somewhere in infinite internet there is some interesting solution. Last PSB I etch in my childhood when I had plenty of time for my passion :-) but why not to do it again :-) Just searching for John Linsley Hood PSU...
Matt
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Post by Deleted on Mar 7, 2016 2:08:42 GMT
Thanx Alex Didn't ask yet... just thought I am not first who is asking about it and somewhere in infinite internet there is some interesting solution. Last PSB I etch in my childhood when I had plenty of time for my passion :-) but why not to do it again :-) Just searching for John Linsley Hood PSU... Matt You can read more about it at the attached link. Click on Power Supplies, and you will find the original article too. If you need further information ask here in R.G. You will only need to use half the PCB for your output, but you will need to fit a small heatsink on the 2SC5171 with the 33 ohm emitter resistor for 24V 1A operation. Instead of 2 x parallel 2,200uF capacitors, you can use 2 x parallel 4,700uF for improved results, provided that the PCB is preceded by a LM317T etc. voltage regulator.
users.tpg.com.au/gerskine/greg/default.htm
See also rockgrotto.proboards.com/thread/5645/ripple-eater-build-support-thread?page=5
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Post by ponczomarinero on Mar 10, 2016 23:52:46 GMT
Found Walt Jung Super Regulator and pcboard to buy, which would be easier to manage. Just thinking to buy transformer 2x15v and add two stabilised outputs of 12V.
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