The simplistic Salas low voltage shunt regulator - Page 536 - diyAudio
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Old 27th September 2012, 07:34 AM   #5351
Salas is offline Salas  Greece
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Quote:
Originally Posted by Kazuo Ozawa View Post
Salas, You pointed out correctly that I was worried before.
Simulation shows that wire loop effects to occur oscillation.
Don't bother much with simulating the loop, just solve it practically to get the soft line with less or no sensitivity to movement and orientation. That nice Tek scope you got will be much faster than theory. Twisting the pair you change a bit and the sim goes off.
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Old 27th September 2012, 07:36 AM   #5352
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Hi Salas, will build a lower Voltage raw DC supply and measure/listen with that. The mosfets are exaclty those used by KAzuo (IRF9610, IRF640). I noticed that the resistor values he uses are very different to those you used in the intial REFLEKTOR.

Salas, why does the reg sound so good?
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Old 27th September 2012, 07:36 AM   #5353
Salas is offline Salas  Greece
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Originally Posted by roender View Post
Thank you
Big caps I saw on the pics... 10mF? What kind of CCS settings?
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Old 27th September 2012, 07:42 AM   #5354
Salas is offline Salas  Greece
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Originally Posted by Dr.H View Post
Hi Salas, will build a lower Voltage raw DC supply and measure/listen with that. The mosfets are exaclty those used by KAzuo (IRF9610, IRF640). I noticed that the resistor values he uses are very different to those you used in the intial REFLEKTOR.

Salas, why does the reg sound so good?
OK the original Mosfets. We changed some resistors from the beta and in the Zobel we allow some tuning down to taste. The trimmer he had to use lower due to lower voltage region. And he did some YAM combinations for inventory reasons. Not that different.
Sounds good because we love it.
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Old 27th September 2012, 07:45 AM   #5355
roender is offline roender  Romania
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Quote:
Originally Posted by Salas View Post
Big caps I saw on the pics... 10mF? What kind of CCS settings?
Yes, 10mF. As per currents, for digital I used 100mA extra (450mA total for DAC,
330mA for SDtrans). For I/V stage only 70mA extra, 200mA total.
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Old 27th September 2012, 07:45 AM   #5356
Salas is offline Salas  Greece
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@ Dr.H
P.S. Put a small R as Roender recommends in your raw psu, he tested in digital app for minimal emi.
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Old 27th September 2012, 07:48 AM   #5357
Salas is offline Salas  Greece
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Originally Posted by roender View Post
Yes, 10mF. As per currents, for digital I used 100mA extra (450mA total for DAC,
330mA for SDtrans). For I/V stage only 70mA extra, 200mA total.
Heavy for 1A diodes indeed. We usually put MUR TO-220s for 10mF. I measured some Nippon KZH, very low DF btw. Recommended.
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Old 27th September 2012, 07:55 AM   #5358
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0.3R? Between bridge and 1st cap?
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Old 27th September 2012, 07:56 AM   #5359
Salas is offline Salas  Greece
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Got to go, Roender will tell you more I am sure. See ya!
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Old 27th September 2012, 08:07 AM   #5360
roender is offline roender  Romania
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Quote:
Originally Posted by Dr.H View Post
0.3R? Between bridge and 1st cap?
Well, If your shunt is designed for 3.3A then yes, the resistor should have 0.3ohm. The voltage dropped over this resistor should be around 1V
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