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Post by Deleted on May 14, 2019 11:14:53 GMT
Indeed they do take a far longer time to fully reach their peak then even some of the larger traditional electrolytic capacitors. I would also suggest that true 5v DC super caps deliver far better p[performance than a bank of equal lower voltage capacitors tied in series! Just an observation.
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Post by Clive on May 14, 2019 11:58:24 GMT
The Ciunas PS uses some thing like this: The are two for the 5V PS, I think rated at 350F but maybe they are the 360F ones in the photo above. My PS has been running for some time so it's well over 200 hours.
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Post by Deleted on May 14, 2019 12:54:28 GMT
I do use something very different Clive, along with a custom TX, custom full bridge, six figure reservoir smoothing, before a custom ultra tight regulator that can now handle well in excess of 5 amps @24vdc then followed by a super capacitor
As with everything the are various grades of supercaps.
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Post by Clive on May 14, 2019 13:01:27 GMT
I do use something very different Clive, along with a custom TX, custom full bridge, six figure reservoir smoothing, before a custom ultra tight regulator that can now handle well in excess of 5 amps @24vdc then followed by a super capacitor As with everything the are various grades of supercaps. Temple Audio do something very similar to yourself. It'll be interesting to compare the two approaches.
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Post by Deleted on May 14, 2019 13:11:30 GMT
Always open for challenge Clive
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Post by julesd68 on Jun 3, 2019 12:19:21 GMT
I do use something very different Clive, along with a custom TX, custom full bridge, six figure reservoir smoothing, before a custom ultra tight regulator that can now handle well in excess of 5 amps @24vdc then followed by a super capacitor As with everything the are various grades of supercaps. Temple Audio do something very similar to yourself. It'll be interesting to compare the two approaches. Hi Clive, am wondering if you have made any more conclusions about the best way to power your DAC - have you tried both the Temple Audio and Ciunas you mentioned?
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Post by Clive on Jun 3, 2019 14:46:51 GMT
Temple Audio do something very similar to yourself. It'll be interesting to compare the two approaches. Hi Clive, am wondering if you have made any more conclusions about the best way to power your DAC - have you tried both the Temple Audio and Ciunas you mentioned? Yes Jules, I've tried both supercap devices with my Qutest. They sound identical even though they use very differing approaches on how they are configured. I also tried a powerbank / phone battery which I've used with a Pi previously. The battery was not as good - it sounded a bit "thick" and not as lithe. There's no question that supercaps are staying.
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Post by MartinT on Jun 3, 2019 14:59:39 GMT
Having compared batteries, LPSUs and supercap PSUs, I agree that the latter are superior.
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Post by John on Jun 3, 2019 15:07:00 GMT
Agree supercaped PSU is the way to go
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Post by julesd68 on Jun 4, 2019 18:42:36 GMT
Hi Clive, am wondering if you have made any more conclusions about the best way to power your DAC - have you tried both the Temple Audio and Ciunas you mentioned? Yes Jules, I've tried both supercap devices with my Qutest. They sound identical even though they use very differing approaches on how they are configured. I also tried a powerbank / phone battery which I've used with a Pi previously. The battery was not as good - it sounded a bit "thick" and not as lithe. There's no question that supercaps are staying. Thank you Clive. I will definitely give them a try in the future, not sure I could justify them cost wise with my current DAC though ...
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Post by Clive on Jun 4, 2019 19:39:47 GMT
Yes Jules, I've tried both supercap devices with my Qutest. They sound identical even though they use very differing approaches on how they are configured. I also tried a powerbank / phone battery which I've used with a Pi previously. The battery was not as good - it sounded a bit "thick" and not as lithe. There's no question that supercaps are staying. Thank you Clive. I will definitely give them a try in the future, not sure I could justify them cost wise with my current DAC though ... Hi Julian, I suspect the DAC may be less important than the power supply. If you look on PFM there a Ciunas 5V power supply "on tour" there are other voltages too. PM your name to John Kenny to try it for a few days.
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Post by julesd68 on Jun 4, 2019 21:29:03 GMT
Hmm - cat amongst pigeons!😁
Yes I saw that thread and thought about giving it a go.
Am also interested to know when the new Allo 5v PSU is going to be released ...
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Post by Clive on Jun 4, 2019 21:51:57 GMT
Isn't it "just" an LPS? Supercaps do more to filter noise and can deliver current much faster. Digital circuits are more demanding of current than analogue due to their on/off characteristics.
From my experience and logic this applies to class d amps too.
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Post by julesd68 on Jun 5, 2019 11:04:12 GMT
I haven't seen any details on it yet Clive.
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Post by wannarock2 on Jun 5, 2019 17:01:58 GMT
Hey guys, several weeks ago Allo announced they were working on a dual output 5V PSU for the Katana among other products. Not a lot of detail at that time on the PSU, but I found this one post blog from an Allo rep. from a couple of weeks ago which appears to provide a little more detail on the unit. Since I know very little on this subject I would be interested in your input on this unit based upon this overview. Link below moodeaudio.org/forum/showthread.php?tid=1378
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Post by Clive on Jun 5, 2019 17:11:54 GMT
The Allo indeed looks to be supercap based..
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Post by MartinT on Jun 5, 2019 17:16:45 GMT
Good R-core transformer, dual isolated outputs, supercaps on the output, AC noise filtering.
All the ingredients are there, its value will depend on the price.
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Post by MartinT on Jun 5, 2019 17:22:05 GMT
I must repeat how critical the PSU (and its power cable) is to the performance of a streamer/DAC. Look to spend more than the cost of the Pi/DAC - in the case of the Katana in ready made form, that's over $400. Then you will unlock its full capabilities.
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Post by julesd68 on Jun 5, 2019 18:11:23 GMT
It looks very promising and as Martin says will mostly depend on price.
No exact price confirmed but I have read that it will be 'well under 200$'.
What that means for EU buyers we don't know yet.
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Post by wannarock2 on Jun 25, 2019 23:23:50 GMT
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