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Post by lurch on Jul 3, 2022 16:48:39 GMT
Don't know much about leccy, but there's a distinct possibility that this has an SMPS inside it. Take the lid off and post a, pic of the internals, if has an SMPS (someone will recognise the contents of the case) then either swapping out for an LPS as firebottle did on his Mutec, or adding an external, one should reap some benefit. I did the PS mod on my Node2 adding the power supply board inplace of the SMPS board and powering it via an SBooster which gave a significant SQ uplift to my ears.
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Post by misterc on Jul 3, 2022 17:57:33 GMT
One of the best ways is use a 4 amp 12 - 19VDC inear power supply depending on your NUC's voltage
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Post by antonio on Jul 4, 2022 4:55:49 GMT
Or why not bite the bullet and buy a purpose streamer Pete.
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Post by misterc on Jul 4, 2022 7:58:02 GMT
Or why not bite the bullet and buy a purpose streamer Pete. Actually Dave the Nuc can produce some really good sounds if treated correctly what do you thinkis inside most streamers that don't use a souped up pi?
The key is whittling out the servies that that don't need for audio (which are a lot if you are running windows lol) Its doesn't require a big core, an I5 is more than sufficent here. Under clocking the CPU to find the sweet spot (along with the ram) and passive cooling only zero fans, good LPS (as thats simple on a NUC). they can be made to run around 7-8W max
The right software and GUI are important which is here a good streamer comes in, if you have the patience and programming skills you can make a NUC sing well
You remember the Merging equipment both you & your brother like? The Nadac I completed last week which has their own server unit inside, very good it is to.
Well that a minimal format NUC motherboard inside with a few minor changes!
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edward
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Post by edward on Jul 4, 2022 10:50:41 GMT
Nice build there Tony. Fancy giving a clue what you have done?  For some time now, for rendering duties only, I've used a Mini-ITX motherboard running Win10pro (all non essential services disabled) using a dedicated USB card (Paul Pang) and other stuff. Both the motherboard and USB card powered by an external PSU (12v and 5v taps). But that is getting long in the tooth so thinking of either a NUC or sticking with the Mini-ITX route. So your recipe may help me on the way.  One thing that keeps throwing me on the NUC is that Intel quote 12-19v but most builds only quote 19v. My lovely PSU is fixed at 12v. |
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Post by misterc on Jul 4, 2022 11:51:08 GMT
Hello Edward Yes NUC's are intersting things lol I have a really fancy NUC here in the lab purely for the T+M equipment slaving etc. its 19Vdc and rated at 6 amps (lol) it runs a 15Vdc and 4 amps uses around 1.2-1.6 amps in the normal steady state (ish) The on above is using 12Vdc and 4 amps on that circuit plus a large capacitance to take into account the turn on current spike, If you increase the voltage then the current will drop, the best way to work this out is touse a current probe on the +ve line feeding the NUC. For a more accurate measurement you could make a simple break out lead, DC plug to DC plug and place a digital multil meter that has current capability in series this will be more accurate (depending on your DVM or current probe). Then you can measure the turn on current profile, steady state (normal operating mode) and dc line sag as you use the NUC features. This will then enable you to select a suitable LPS for all aspects of the NUC's operation. If you wold like me to measure it for you and calaculte the correct LS you would need happy to do that Edward
This is the power supply for the Dac/Streamer itself.
Consited of five independant ultra low noise DC rails.
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edward
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Post by edward on Jul 4, 2022 12:23:34 GMT
Cheers Tony. The mini-itx is also 12-19(ish) but I've always only used 12Vdc. The LPSU (combination of Paul Hynes and Toroidy stuff) has a fair amount of capacitance (but I don't recall how much). Never had an issue. I don't have a NUC to play with so can't measure stuff. If you can easily provide the NUCs voltage specs that would be great. Oh hang on, just found the specs for the PH boards. For the 12v regulator board it is 6a continuous 30a transient output. The smoothing caps = 2x3300uf 25v. More can be added. What did you do inside the case you pictured in terms of connecting the NUC board to other stuff and then to the outside world? What software do you use? Apologies to the OP (Peter) for the thread drift.  Edward |
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Post by misterc on Jul 4, 2022 12:30:51 GMT
Hi Edward All I am going to say about the P haynes stuff is this, very powerful and robust but noisy. Pretty standard FET based supply. Will dig out the images and measurments for you I have a couple of the model 5 and 7's that were traded back. The NUC in that installation was as standard they use they own custom linux code to run the streaming head section. I wrote my own for the streamer design unit, but if you are connected via the local betweork any quality UpNP player should run it Bubble UpnP, Roon, even Linn Kinksky lots of choice here.
This is a Number 6 dual siz amp 12Vdc unit
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edward
Regular
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Posts: 194
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Post by edward on Jul 4, 2022 13:27:52 GMT
Well that is a curved ball you have thrown me Tony! I was working on the assumption that the PH stuff was world class, certainly that assumption was supported by numerous positive reports. oh well - back to the drawing board.  |
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Post by misterc on Jul 4, 2022 13:47:59 GMT
Well that is a curved ball you have thrown me Tony! I was working on the assumption that the PH stuff was world class, certainly that assumption was supported by numerous positive reports. oh well - back to the drawing board.  I would say it well thought out and constructed, plenty of current and its a stout supply thoug not much in the way of ultimate filtration of reserve. A couple of chaps I have who ran serious computer set up's (the above PH6 & PH 5 one came from one of those chaps) who ran them on his cut down self built streamer. We always struggled with extracting best performnace from his set up. One day I took round a modest streamer and it was quite obvious something was amiss with his with his set up.
After a couple of weeks of experimentation it was clear the PH psu's while very robust were counter intuitive hence why ended up with them, for certain things they are very good, others not so shall we say. But then you can't be good at everything.
Interesting at lunch today we have been playing around with memory players again, they maybe somehting in this I need to revisit! Did't really want to draw ourselves back from listening 
I did actually offer to buy the name from the legal chap who owns the company last year, however he 'felt' they were more orders to come despite going bankrupt? who know's what going on there.
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