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Old 16th February 2010, 10:48 AM   #1881
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Can I use these leds?

Digi-Key - 511-1206-1-ND (Manufacturer - SLI-325YCT31W)
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Old 16th February 2010, 10:54 AM   #1882
Salas is offline Salas  Greece
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Yes, why you posted the same question in all 3 related threads simultaneusly?
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Old 16th February 2010, 12:58 PM   #1883
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Simply, because I don't know if the answer is the same for the 3 differents applications (RIAA, Shunt for RIAA, Hypnotize shunt).

Many thks for help.
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Old 16th February 2010, 07:08 PM   #1884
RCruz is offline RCruz  Switzerland
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Hypnotize shunt ?

What are you using it for ?

Last edited by RCruz; 16th February 2010 at 07:33 PM.
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Old 18th February 2010, 09:13 AM   #1885
Ekkeri is offline Ekkeri  Finland
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This thing again..

Click the image to open in full size.

Quote:
Originally Posted by Salas View Post
...best quality capacitors across Vrefs and lose the 0.1uF bypasses, its a hit or miss.
What do you mean by best quality? Low ESR? Any recommendations? Do I skip all 0.1uF bypasses?

Quote:
Originally Posted by wheezer View Post
Four 31dq05 Schottky diodes for your fwbr.
Thanks, I will try those. Has those C1/C7/C13 too big value (4700uF) after thc FWBRs?
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Old 18th February 2010, 10:55 AM   #1886
Salas is offline Salas  Greece
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BG red NP if you can find. Yes, I would not care about bypasses, sometimes they don't marry well. Since there are positions for them bcs you are having a board, you could make a subjective comparison with and without given your particular main caps and bypasses I guess. Start without, and after you got a good grip of the performance add them and decide.

It will work with a range of values Cfilter, the CCS rejects a lot of ripple. But those people made it and listened to it that way. Its blended with their DAC, better do what they did and then you may play IMHO.
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Old 19th February 2010, 09:08 PM   #1887
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Quote:
Originally Posted by RCruz View Post
Hypnotize shunt ?

What are you using it for ?
I pre-ordered one Buffalo 32 DAC & one Ivy I/V, surely I will use a R-Core Tx from France to supply the Hypnotize shunt for the DAC.
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Old 23rd February 2010, 05:10 AM   #1888
DougL is offline DougL  United States
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Quick questions. I read the thread (Beast!) and am interested in doing a V1.1 shunt for a B1.

Question: whats the recommended voltage drop vs the raw supply?
I note that the simulations are all about 6V.

Also, I found a switching supply TDK LS25-24.

The Data sheets for it are LS Series
http://www.us.tdk-lambda.com/lp/ftp/.../ls_manual.pdf

Would this work?
Any down side other than perhaps extra switching noise?

Thanks in advance.

Doug

By the way I used my Blog to mark posts in this thread.
http://www.diyaudio.com/forums/blogs...pplies-b1.html
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Old 23rd February 2010, 09:02 AM   #1889
Salas is offline Salas  Greece
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You need a single polarity 18V reg in other words? 6-10V Vin-Vout will do. Prefer 10V if you have it.
You mentioned 1.1. Are you looking for performance beyond V1's standard?
There is 1.2 in the beta. Works fine as by now. 1.1 was just a buffer test that led to 1.2's development.
It can work without oscillation if the local B1 big electrolytic cap has enough ESR, or if it isn't there at all. In any case this reg performance class needs careful application and termination, checks with scope, coaxial shielded remote sensing wire. If you are interested I can release what is on beta now for you, but it has not been deployed widely yet, its speedier, can not guarantee zero hassle to each different use, V1.0 has been used by hundreds of people on almost anything and its the surely deaf one to adverse application.
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Old 23rd February 2010, 02:48 PM   #1890
DougL is offline DougL  United States
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I was looking at the V1 with the LED string on the CSS. Example Post 1084 The simplistic Salas low voltage shunt regulator
Honestly I was looking for something simpler than V1 and read the thread to understand the issues involved. The engineering seems so good it looks like building it as a reference is my best option. For my needs the performance seems fine and stability will be welcome.
I will omit both electrolytes and the 1 ohm on the B1.

Thanks.

Doug
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