leo
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Post by leo on May 16, 2009 13:55:50 GMT
Oh look what I'm listening too ;D  |
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Will
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Post by Will on May 16, 2009 14:00:20 GMT
And?
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leo
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Post by leo on May 16, 2009 14:03:16 GMT
You don't want to know  I've got the output stage powered from Paul Hynes regs, this thing is going to cause a lot of the high end stuff some major problems  |
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Spirit
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Post by Spirit on May 16, 2009 14:09:46 GMT
That's what I like to hear Leo  That's on the list after the media pc... Bring on December...  |
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leo
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Post by leo on May 16, 2009 14:15:21 GMT
I'll try it with LM317/337 + JLH's soon to see how it is, if its half as good with those as it is with the Paul Hynes it should satisfy most folks Hope your speakers are good at handling bass |
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Will
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Post by Will on May 16, 2009 16:05:28 GMT
Picture Homer Simpson, looking at Doughnuts.
That's me, that is.
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Spirit
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Post by Spirit on May 16, 2009 21:46:36 GMT
I'll try it with LM317/337 + JLH's soon to see how it is Muchly appreciated Leo |
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leo
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Post by leo on May 17, 2009 16:01:23 GMT
I've now tried standard LM317/337 and LM317/337 + JLH.
In this case JLH added more smoothness and mid to lower mid weight.
For the first time I'm not sure if I liked the JLH or not, I'm thinking it could be the SVP Polymer caps used on the Buffalo32, these are very low impedance, added with the JLH's may have been overkill for the regulators output, I'm not sure.
Further investigation me thinks!
The standard regs on there own sounded ok imo
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Will
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Post by Will on May 17, 2009 16:13:33 GMT
Interesting find, Leo. I guess that the Paul Hynes are still top of the tree, but the JLH/317/337 combo is an acceptable 'stand-in' for the time being, or is the straight 317/337 or 7815/7915 fine good enough. Did the JLH you use have a Panasonic FC for the 10uF? I think I remember that this cap positional was crucial to the 'flavour' of the sound. Just a random thought that popped into my mind. Is you mate missing his new toy? |
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leo
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Post by leo on May 17, 2009 18:21:56 GMT
Interesting find, Leo. I guess that the Paul Hynes are still top of the tree, but the JLH/317/337 combo is an acceptable 'stand-in' for the time being, or is the straight 317/337 or 7815/7915 fine good enough. Did the JLH you use have a Panasonic FC for the 10uF? I think I remember that this cap positional was crucial to the 'flavour' of the sound. Just a random thought that popped into my mind. Is you mate missing his new toy? Its ok with LM317/337 or LM317/337 + JLH It improved with the JLH after a while, I guess it needed more time than normal to warm up The 10uf fitted is just Suntans, not sure what low ESR I have to try here, I don't think FM go that low and I'm sure I have no FC's here. Anyway I'll have a look This is also the one with CL bypassed Polymer are not like normal electrolytics , you really have to use them with care, they are supposed to have less distortion than fluid electrolyte caps as long as they are stable in a particular app so hopefully the SVP's are ok here Any of these alternative regs seem ok so far, its best to have a tweak though I think, the regs for the output stage do affect the sound in this dac a fair bit I might stick the scope on it when I get time |
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leo
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Post by leo on May 17, 2009 18:24:23 GMT
BTW my mates in no rush, I'll be playing with this thing for a while yet
Hope he's not reading this ;D
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leo
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Post by leo on May 17, 2009 20:07:00 GMT
Spoke too soon, the sound has gone strange now  the LM317 based regulated supply is still plugged in I'm having doubts about these SVP caps |
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Post by Deleted on May 18, 2009 0:18:35 GMT
Spoke too soon, the sound has gone strange now the LM317 based regulated supply is still plugged in I'm having doubts about these SVP caps Leo Give it more time. The el cheapo DAC sounded good with a new JLH initially, but the next day I thought it may have gone faulty!  48 hours later it sounded very good for what it was. Alex |
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Will
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Post by Will on May 18, 2009 6:03:14 GMT
I was going to suggest the same thing as Alex. The board was most likely only built last week, and we all know what capacitor forming is like.
Just seen the thread at DIYAudio, interesting. But what all that about the cutting of tracks?! Couldn't they have placed jumpers in?
Leo, the PH regs, do you feed them rectified voltage or just ac from the transformer?
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Will
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Post by Will on May 19, 2009 14:28:32 GMT
I see that TP are gearing up for another round of pre-orders this weekend.
Oh dear......
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leo
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Post by leo on May 19, 2009 16:55:02 GMT
The grounding mod helped a few issues The PH regs are ran from rectified voltage Next thing I'm going to try when I get time is to have the other PH regs running the AVCC L&R and the dacs digital supply too It may be worth waiting Will tbh, I'd wait for a few more folks to try it and add opinions I'm still not 100% with it yet tbh although remember I've a lot of other stuff to compare including a modded Buffalo using different regulation and parts on the IVY |
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Will
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Post by Will on May 19, 2009 17:18:37 GMT
Hmm, I know what you mean, I think. The only trouble is, is getting trustworthy opinions. On head-fi, you'll get a stream of "OMG, it rules!", and I don't know which people at DIYAudio have a balanced opinion (although I think I know which ones have close minds/ears) This does seem to bring it back to you, as a trustworthy opinion Buying this weekend would be a stretch, to be honest, so waiting a bit, and seeing what's said when the board is fully burnt-in seems a good idea, as well as the future improvements that separate supplies to AVCC could bring (nice of TP to build that in, I think) Myself, I have the cheapo dac to compare it with, which I like a lot, so that is the limit of my experience. At the end of the day, I can only spend my money and make my own decision, and hope its not £300 better spent elsewhere. Looking forward to what you find! |
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Will
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Post by Will on May 27, 2009 20:35:59 GMT
Ooops!...my finger slipped at the weekend |
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jonclancy
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Post by jonclancy on May 27, 2009 22:53:22 GMT
Mrs W's going to have your guts for garters!! |
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Will
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Post by Will on May 28, 2009 6:08:34 GMT
After the money I dropped on the new conservatory, she has no grounds for complaint! Mind you, I'm really building it for a generic 'bloke at work'. Also available are: 1. I won it in a competition, and 2. I've had it for ages. |
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leo
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Post by leo on May 28, 2009 10:28:47 GMT
If you have problems Will let us know on here , this one is currently sounding very good Weird thing though, it seems it can go from one extreme to the other
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Post by PinkFloyd on May 28, 2009 11:01:15 GMT
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Will
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Post by Will on May 28, 2009 19:20:13 GMT
Will do Leo.
I couldn't help myself when they were sitting there, in stock.
You cant get the old buffalo anymore, so this is the one to get, I reckon. Plenty of time to get ready, shipping doesn't start until July 1st!
The PH Z1A/N regs, they don't appear on the Paul Hynes website. I assume that he still makes them though, if you ask nicely?
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Will
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Post by Will on May 28, 2009 20:58:33 GMT
So it appears that TP have found a box of the original buffalo's, and will be selling them for $159 each, which is a good price. Look for them in the parts bin soon.
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Post by dean0 on May 28, 2009 22:43:08 GMT
any eta's? i know they'll be snapped up fast!
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I've got the output stage powered from Paul Hynes regs, this thing is going to cause a lot of the high end stuff some major problems 
the LM317 based regulated supply is still plugged in
