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Post by DaveC on Apr 24, 2018 9:34:43 GMT
I think it's more about accidentally shorting the terminals with the potential for a huge discharge current causing arcing. Agreed ! No way would 16V give you a belt or a shock !!
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Post by stanleyb on Apr 24, 2018 10:31:53 GMT
For some good reading on super capacitors if you wish to know about the theory, handling, how to use them in your hobby projects, and the differences in hazard between a traditional cap and a super cap. You won't get an electrical shock, but an acute stress reaction, often described as a traumatic shock.
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Post by naim1425 on Apr 24, 2018 10:39:18 GMT
Well you must be used to that by now so you can make mine for me ,so I don't get the shock,can I have a black box one please
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Post by stanleyb on Apr 24, 2018 11:15:27 GMT
I am busy doing the production version Alan. There is only one in existence right now, which is a prototype. Building on off units by hand is heavily time consuming, which then makes it ridiculously expensive for the majority of interested persons. I know that it sounds better than even any of the £250 odd linear power supplies out there ( I have acquired a number of them over the years for testing purposes. But that doesn't mean that I would feel comfortable with myself to charge anyone that much to build them one.
By the way, I go to extreme lengths to avoid any shocks. So rest assured I am not accustomed to them.
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Post by Deleted on Apr 24, 2018 11:26:22 GMT
To be fair, you can always discharge the caps with a dummy load just to be sure what those resistors glow lol
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Post by pre65 on Apr 24, 2018 12:07:10 GMT
Thicko question.
If you put a 16v super capacitor across a 15v supply will the capacitor only charge up to 15v ?
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Post by MartinT on Apr 24, 2018 12:09:20 GMT
Yes.
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Post by naim1425 on Apr 24, 2018 14:04:27 GMT
I am busy doing the production version Alan. There is only one in existence right now, which is a prototype. Building on off units by hand is heavily time consuming, which then makes it ridiculously expensive for the majority of interested persons. I know that it sounds better than even any of the £250 odd linear power supplies out there ( I have acquired a number of them over the years for testing purposes. But that doesn't mean that I would feel comfortable with myself to charge anyone that much to build them one. By the way, I go to extreme lengths to avoid any shocks. So rest assured I am not accustomed to them. so it will be a vital upgrade for my supercapped seg and will the new supercapped psu power both seg and cappella at the same time or will i need one for each. cheers stan,its better you getting a shock than me,because i will feel the pain for you.lol
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Post by BilliumB on Apr 24, 2018 19:24:35 GMT
All sounds very interesting Stan. I’ve got a Supercapacitor based car jump starter and that is very impressive at starting my 4.6 litre Range Rover when the battery is flat (too often). Looking forward to more information.
Cheers. Bill
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Post by MartinT on Apr 25, 2018 6:52:59 GMT
I listened to all-Spotify sources last night with the SEG + supercap PSU. My Raspberry Pi/DigiOne/Volumio is set to 24/96 upsampling in Very High Quality mode and uses the Volspotconnect plug-in for direct control from Spotify. The co-ax cable is a 1.2m Blue Jeans Belden 1694A Brilliance. Spotify is set to hi-bitrate mode.
As with the previous night, the tell-tale resolving of venue spaces is present in a large number of songs, together with extreme fine detail presented naturally, as well as making it easier to pick out voice or instruments from the mix. I'll just highlight a couple of songs as examples.
Norah Jones' Thinking About You is an exquisite song and the jazzy horn section sounds magnificently raspy and vivid. It's a wonderfully laid back, lush production and quite beautifully recorded.
Lo Fang's cover of You're the One That I Want is superbly different from the original. There's a wealth of micro detail as well as the descending deep bass giving a minor key sadness to it. His voice matches the song perfectly. Another superb, but more contrived, production.
Using Spotify for a whole evening's listening, eh? Who would have thought? Certainly not me, even a year ago. Spotify/Pi/SEG/supercap becomes a primary source for me, no question at all.
I need to find my AES adapter in order to try the Ayre player as a transport into the SEG tonight.
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Post by stanleyb on Apr 25, 2018 7:50:22 GMT
You really need to grab some sleep Martin. Lee, who tested the 1st prototype, told me that he sometimes listened to the supercap PSU with modded SEG for so long that by the time he went to bed the sun was showing signs of rising in the East. Personally I can't recollect anyone ever expressing the same sentiments about any other DAC.
By the way I am currently attending to the firmware to see if I can track down the reason for the out of lock clicks from the SEG audio output when changing music tracks. It doesn't do it on the Caiman MKII, so I suspect a timing code difference in the firmware routine, or a difference in the version of the compilers used to compile the two codes.
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Post by John on Apr 25, 2018 7:54:26 GMT
I used to be quite anti Spotify as just could not get decent sounds from it when using Windows I am looking forward to your report with the Ayre
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Post by MikeMusic on Apr 25, 2018 9:10:34 GMT
This is all with Spotty and the Pi.
How might the SEG and new PSU perform as a DAC for the Ayre ? (assuming the right out socket/s)
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Post by MartinT on Apr 25, 2018 9:15:50 GMT
You really need to grab some sleep Martin. I did NOT want to go to bed last night. However, an 04:40 alarm every morning means I have to be sensible. The sync noise only seems to happen to me at the beginning of a session. After that, the SEG behaves impeccably for the rest of the evening.
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Post by tonyone on Apr 25, 2018 10:03:34 GMT
I listened to all-Spotify sources last night with the SEG + supercap PSU. My Raspberry Pi/DigiOne/Volumio is set to 24/96 upsampling in Very High Quality mode and uses the Volspotconnect plug-in for direct control from Spotify. The co-ax cable is a 1.2m Blue Jeans Belden 1694A Brilliance. Spotify is set to hi-bitrate mode. As with the previous night, the tell-tale resolving of venue spaces is present in a large number of songs, together with extreme fine detail presented naturally, as well as making it easier to pick out voice or instruments from the mix. I'll just highlight a couple of songs as examples. Norah Jones' Thinking About You is an exquisite song and the jazzy horn section sounds magnificently raspy and vivid. It's a wonderfully laid back, lush production and quite beautifully recorded. Lo Fang's cover of You're the One That I Want is superbly different from the original. There's a wealth of micro detail as well as the descending deep bass giving a minor key sadness to it. His voice matches the song perfectly. Another superb, but more contrived, production. Using Spotify for a whole evening's listening, eh? Who would have thought? Certainly not me, even a year ago. Spotify/Pi/SEG/supercap becomes a primary source for me, no question at all. I need to find my AES adapter in order to try the Ayre player as a transport into the SEG tonight. Never knew the Pi was capable enough for upscaling?? Interesting.
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Post by MartinT on Apr 25, 2018 10:14:05 GMT
It's a really good improvement, too. I'm using a Pi 3 which has enough horsepower.
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Post by zappytheviking on Apr 25, 2018 10:19:31 GMT
It doesn't sweat up-sampling at all, checked it when I first got it, uses maybe 10% of processor power total.
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Post by tonyone on Apr 25, 2018 10:28:02 GMT
is it Volumio (spelling) that works the upscaling? Do either of you think it could power ' HQ Player'??
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Post by MartinT on Apr 25, 2018 11:00:45 GMT
Yes, Volumio does the upsampling. See here for more details of which computers can run it.
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Post by John on Apr 25, 2018 11:12:40 GMT
Worth checking in the settings to see if HQ player can do this When I get home I upload a image in the raspberry pi thread It a nice upgrade without any costs
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