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Old 10th December 2011, 06:57 PM   #3361
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I can see no obvious errors, but maybe those 14k Resistors need to be tweaked a bit.

Those Salas style shunts are not easy to get right. I tried several similar circuits of my own, but Salas' where the only one to work stable and without small or tall oscillations, but layout is a major issue (at least in p2p-breadboard).

PM sent.

Rüdiger
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Old 10th December 2011, 06:59 PM   #3362
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Quote:
Originally Posted by Joachim Gerhard View Post
...I have a fine Macbook Pro now but i swear that my IBook was the next day in Poland giving maybe 100,-€ on the black market.
It´s pathetic, those pricks really suffer a bad life.
I would not count on Poland Joachim. We are far worse thieves than most of German people belive + we really can afford laptop or PC without much hassle...

Please PM me, maybe macbook is still trackable.

Marcin.
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Old 10th December 2011, 07:10 PM   #3363
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Sorry about accusing your people, that was just a place holder. But is has happened to a friend of mine that had his fashion shop robbed twice. His stuff appeared is east europe shortly after. He had to close. Those guys also stole his transporter, drove to the Autobahn, dropped it there and stole another car to continue the journey. That way they where impossible to track. Thanks for offering help.
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Old 10th December 2011, 07:14 PM   #3364
RCruz is offline RCruz  Switzerland
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Originally Posted by masag1 View Post
After extended Listening sessions we have found out that painting the top of the transistors with this nail laquer (PRITI NYC MINI Nagellack - keepsake rose - Zalando.de) gives a better resolution in the higer mids.

Maybe caused by the additionel damping.



Sam
Hi Sam

Maybe I should go for it now as there seems to be a discount
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Old 10th December 2011, 07:27 PM   #3365
masag1 is offline masag1  Germany
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Hi Sam

Maybe I should go for it now as there seems to be a discount




That was good Recardo

Regards
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Old 10th December 2011, 07:57 PM   #3366
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As promised before;
HB's Shunty
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Old 10th December 2011, 08:41 PM   #3367
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Thanks.
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Old 10th December 2011, 09:17 PM   #3368
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That was at a time where i had illusions about offset in transimpedance stages. This thing needs a servo but i could not even make the bias work in the input stage so i stopped there.

Joachim, in my desing on post 2056 I had to parallel some of the 86R-Resistors of the current mirrors to null the (otherwise enormous) offset. The bias remains stable since.
No servo needed.

Rüdiger
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Old 10th December 2011, 09:45 PM   #3369
hesener is offline hesener  Germany
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tried the "paradise lost" shunt reg with a mosfet CCS, works beautifully. the advantage over the LM317 CCS is that the dropout voltage can go down to 1v whereas the 317 requires at least 4v to work ok , and its not a lot more components... credit due to ikoflexer for this ccs...
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Old 10th December 2011, 09:47 PM   #3370
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a mosfet CCS should have a higher bandwith as well, doesn't it?

Joachim, where do you source the common mode chokes from?

Rüdiger
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