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Old 13th September 2010, 10:15 PM   #3001
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Quote:
Originally Posted by ikoflexer View Post
For smaller voltage output decrease the value of R18 and R16. The current limit is set by R25. To get 45V output Q8 would have to be replaced with some higher voltage npn.
10k & 11k, could I use a 10k trimmer pot to fixe the voltage needed? any suggestion for higher voltage npn Q8?
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Old 15th September 2010, 12:25 PM   #3002
iko is offline iko  Canada
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Yes, you could use a trimmer, but after you find the right value it would be best to use fix value resistors. For Q8 you could try BC546B.
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Old 15th September 2010, 12:31 PM   #3003
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Thank you very much Iko.
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Old 16th September 2010, 07:55 AM   #3004
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Quote:
Originally Posted by RCruz View Post
With a carefully chosen GND layout, the problem is now solved.
(Thanks Salas )
Please share?
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Old 23rd September 2010, 04:25 PM   #3005
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Hi ! Salas
i have test Salas low shunt v1.0 out 3V3, with Q4 = Bd140 or MJE 350.
I want ask you about Mje 350 and Bd140, Which one is it better?? MJE or BD??
Thanks !
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Old 23rd September 2010, 04:33 PM   #3006
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I remouve R= 10 Ohm
and I Change C 220uF// Trimmer by Tantalum capacitor 22uF or 47uf!
I see the sound is like! only this cap.
What do you think about the change???
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Old 23rd September 2010, 04:47 PM   #3007
Salas is offline Salas  Greece
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BD140. Avoid tant caps. Most distortion, bad reliability. You probably liked the elevated 2nd harmonic they contribute. Test1 circuit shows Q6 reversed.
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Old 23rd September 2010, 04:55 PM   #3008
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Ok! I use Bd140 ad 3.3 v and not use Tant caps!

Such design for CCS V1.2 shunt v1 looks great!
But inconsistent with the V-in source, it is difficult for DIY?
V1.0 is a complete design and simple
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Old 23rd September 2010, 05:04 PM   #3009
Salas is offline Salas  Greece
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I don't understand the question. Please rephrase.
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Old 24th September 2010, 02:34 AM   #3010
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Quote:
Originally Posted by Salas View Post
I don't understand the question. Please rephrase.
I say that:
The Salas low shunt
V1.0 is a complete design and simple , And the sound excellent for DAC, for pre and phono...,can adjust from 3-50V out put!
Because it is very simple and it is easy for all people make it,

Now , i test at 3.3v out, it is good!
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