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Old 18th September 2012, 10:25 AM   #31
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Updated the sheet.

Thanks

Roger
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Old 18th September 2012, 10:26 AM   #32
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You could measure the exact power consumption of the SB and if it is way lower you maybe could use the power supply with a heatsink on the pass transistor. It would not be the first time a 1 A supply is used while the device actually takes 200 mA.

SB will sound better with a linear power supply.
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Old 18th September 2012, 10:53 AM   #33
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Originally Posted by bobo le chat View Post
Updated the sheet.

Thanks

Roger
Hi Roger, nice to see you here
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Old 18th September 2012, 12:55 PM   #34
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Originally Posted by jean-paul View Post
Hi, new PCB is clearly an improved version of the 2.6, not a total redesign if any of you would expect that. We are busy with it and some things have been changed already like polarity of C32, C8 closer to XO, possibility for using a film cap for C1 etc. It will take time and things might change as I am the king of organized chaos. What you can expect is a better sounding version.

Other caps can be used too. Stay tuned.
Jean Paul how would you define Improovement over 2.6 - subjective - with blind test or you have measurments
I am not sure how positioning of few caps can go to clear improovement
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Old 18th September 2012, 01:47 PM   #35
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Just listen to your rev. 2.6 to see how placement of caps and short tracks influence the total result. Still busy with layout of 3.0 so can not comment as it does not exist yet and thus it has not been tested. We design it and make a small test run, test it, compare it with rev. 2.6 and then it will be presented.

Just wait, we do the work. If you have some ideas you can speak them out now.
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Last edited by jean-paul; 18th September 2012 at 02:07 PM.
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Old 18th September 2012, 04:32 PM   #36
mickie is offline mickie  Germany
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As many people seem to like to experiment with the output-caps, i suggest to put some additional ground-connections to the board so that different types of film-caps can be installed - like the boxed polystyrenes (7,5mm pitch) or caps that require 10mm pitch.
Yes, of course i know that smd or very small caps are most wanted.....so smd pads could also be useful.

mickie
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Old 18th September 2012, 04:43 PM   #37
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Hi this will be difficult because of other changes but we'll see (meaning I will try). I won't use pads for SMD output caps as through hole film caps are the most used (in al its variants).

Which boxed KS with 7.5 mm pitch are you referring to ? Send me a few and they'll be on the board
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Last edited by jean-paul; 18th September 2012 at 04:52 PM.
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Old 18th September 2012, 05:59 PM   #38
mickie is offline mickie  Germany
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...i'm referring to the orange ones made by Siemens / EMZ, or Philips KS (yellow) - hard to find. Still in production are RELCAP RTE (expensive). About the pitch...ok, its rather 7mm, they seem to vary a bit.
Well i can send you a few; won't be very useful though as they don't have the value we need....
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Old 18th September 2012, 06:07 PM   #39
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Boxes full of those Siemens/EMZ/Philips KS here but not in 4.7 nF. I think it is not wise to use a cap that is rare and also hard to find. Send me 2 x 4.7 nF Relcap RTE and check availability and they'll be on the board. KS is the best in film caps. I already used ERO KS on the DAC but those are also impossible to find.
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Last edited by jean-paul; 18th September 2012 at 06:10 PM.
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Old 18th September 2012, 06:34 PM   #40
mickie is offline mickie  Germany
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As for the RTE caps: Partsconnexion carries them; i don't have any of those, need to order myself...
BUT if you need to tear the whole layout apart just to make them fit... well, its probably not worth the hassle.
Was just a thought.

Regards,
Mickie
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