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Post by MikeMusic on May 10, 2018 9:18:51 GMT
Bi Supply
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Post by Slinger on May 10, 2018 13:18:51 GMT
Supercap Injection?
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Post by zappytheviking on May 10, 2018 14:43:25 GMT
Maybe some acronym, Supercap Power Storage Stabilizer , SPSS.
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Post by MartinT on May 10, 2018 15:28:12 GMT
Raptor SEC (Special Edition Capacitor).
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Post by Mr Whippy on May 10, 2018 21:08:17 GMT
PITM - Pig In The Middle PS - Polyamoly Supply TSH - The Shit Hot - Add On TIDBI - The I Don't Believe It - Add On
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Post by naim1425 on May 11, 2018 17:55:47 GMT
Stans super capped supply
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Post by sq225917 on May 11, 2018 20:39:15 GMT
I feel confident it will Stan as you have a great reputation for producing products at reasonable costs and for hitting well above their price point. It has already proved it performance at the ASBO I am also aware that others will be more sceptical until they try for themselves. Indeed John. I remember when I first stated to make available updated firmwares all those years ago that produced an improved audio listening experience. Quite a few people took that suggestion with a pinch of salt since it did not appear to be technically possible to do such a thing via coding alone and without any hardware changes. But other DAC engineers did pay attention to what I was doing and no doubt reverse engineered my firmware code. And since then quite a few DAC manufacturers have been releasing firmware updates for sound improvements. Stan, which programmable chip in your dacs do you flash for a firmware update?
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Post by stanleyb on May 12, 2018 7:40:53 GMT
I switched from the PIC16F88 to the PIC16F628A on advice from Microchip and for cost reasons. But to be frank about it, the PIC16F88, used solely on the BMI, gives me far better results and options that I miss. If it wasn't for the amount of coding needed to go back to the that chip I would have done it by now. The main issue between the two chips is that the 628A has a delay in switching from one time period to another. It's very minute and won't be noticed in general use. But for time critical work in the 10 to 20MHz range the 88 is far superior.
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Post by covenant on May 13, 2018 12:43:34 GMT
Hi Martin, In your OP you say: 'Powering the unit is a standard unregulated linear wallwart power supply'. Is this different from a standard SMPS? Generally the word linear is not used when referring to SMPS. If it is an SMPS, would it inject noise into the system? It seems only a short while ago that we were being urged to get rid of all switched mode supplies, even the ones powering routers. Apologies if I am showing my ignorance here.....
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Post by MartinT on May 13, 2018 13:11:25 GMT
It's not an SMPS, just a small linear PSU that Stan chose for testing. The next time I'm over there, I'll give you its specs. It doesn't put noise out and, as I remarked further up, the sound quality improved marginally when I plugged it into my clean regenerator power. I certainly wouldn't knowingly ever plug an SMPS in there!
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Post by stanleyb on May 13, 2018 13:19:19 GMT
Hi Martin, In your OP you say: 'Powering the unit is a standard unregulated linear wallwart power supply'. Is this different from a standard SMPS? Generally the word linear is not used when referring to SMPS. If it is an SMPS, would it inject noise into the system? It seems only a short while ago that we were being urged to get rid of all switched mode supplies, even the ones powering routers. Apologies if I am showing my ignorance here..... The SEG DAC is not powered by the mains connected power supply, which merely maintains a level of charge to the Supercap energy storage unit. The Supercap unit is best topped up with a linear power supply from my own experiments. The SMPS power supply that is normally shipped with my DACs might shut down prematurely due to the safety circuits normally built into SMPS units.
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Post by covenant on May 13, 2018 19:52:34 GMT
The Gator Smoothie
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Post by MartinT on May 28, 2018 0:18:45 GMT
Just an update on the SEG running Stan's prototype 15V supercap PSU, itself running from a low power linear 15V PSU. The supercap unit takes 15V DC in and smooths it via a series of high value supercaps to give a highly noise-free, large power reserve DC into the Caiman SEG. After first switch-on from empty, it displays a red LED to indicate charging. This takes a couple of minutes before the LED gradually turns blue to indicate full charge. The plug PSU is clearly specified to just do the job of providing power since even switching on the SEG will turn the LED momentarily red before settling back to blue after some 10-15 seconds. I now leave it running permanently. I have the SEG running in mode 3 (Data Recovered clock) and the 15V PSU is plugged into my regenerator. Input is from the Pi running Volumio upsampling to 24/96 via co-ax S/PDIF from the DigiOne add-on board. Both the Pi and SEG are standing on Black Ravioli pads and have a granite coaster on top. The sound is spectacularly good. It throws a wide and deep soundstage and the performances are vivid, detailed, dynamic and very natural. I have played a lot of music through this combination, rock, classical, voice, solo instrument. In all cases, the sound of the venue is reproduced very well - indeed, with a couple of classical recordings, traffic noise outside the studio can be clearly heard. What I like is the exciting but non-harsh presentation and the feeling of hearing a real performance because the performers and the acoustic they are playing in are highly convincing. I have quoted music in past posts but there is something good from everything I have selected to play recently in the 'What are you playing now...' threads in both General and Classical sections. stanleyb really has done something remarkable here and I look forward to the culmination of his research in the form of a production model(s).
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Post by John on May 28, 2018 5:08:41 GMT
Looking forward to hearing it
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Post by MikeMusic on May 28, 2018 9:45:40 GMT
Me too !
What news of production Stan ?
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on May 28, 2018 14:04:16 GMT
Ditto!
BW
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Post by stanleyb on May 29, 2018 7:57:41 GMT
Work in progress. I am waiting for the blank PCBs to be completed before we can start fitting the components. It will be at least July before the end product is ready to be shipped to me from the factory.
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Post by MikeMusic on May 29, 2018 10:32:06 GMT
Thanks Stan
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Bonky
Rank: Trio
Posts: 156
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Post by Bonky on May 29, 2018 10:43:14 GMT
Stan, any approximation to the cost?
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Post by stanleyb on May 29, 2018 12:58:56 GMT
I haven't seen the various invoices from the project yet. But it will be less than £100 delivered.
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