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17th January 2002, 12:16 AM
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#1 |
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diyAudio Member
Join Date: Dec 2001
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Balanced Zen Linestage or Holtons Ver
Just wondering if anyone has built either, or preferebly both, i'm going to be building a linestage for a pair of recently completed Leach amps and have narrowed it down to these two. Also anyone have a good source for the 10uf capacitors used...also what type is best...cheapest i found was digikey for about 5 dollars a pop, not ridiculous but a little expensive... any thoughts welcome
thanks, andy Anthony Holtons SE Preamp: http://www.aussieamplifiers.com/se-sch.htm The bal zen is at passlabs.com |
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17th January 2002, 03:16 PM
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#2 |
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diyAudio Member
Join Date: Apr 2001
Location: Limoges, France
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Ajhawkins,
Perhaps you could get best of both worlds using two current sources (one for each Mosfet), and add the mysterious X resistance between the sources of Mosfet Cheers,
__________________
François "Learning French is trivial: the word for horse is cheval, and everything else follows in the same way." |
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17th January 2002, 07:20 PM
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#3 |
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The one and only
Join Date: Mar 2001
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The mysterious X resistance is not the resistor
between the Sources, rather the symmetric feedback from both sides of a balanced circuit to the differential inputs. |
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18th January 2002, 01:50 PM
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#4 |
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diyAudio Member
Join Date: Apr 2001
Location: Limoges, France
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Oups,
Sorry, Mr Pass.  In fact, my "mysterious X" did not refer to the supersymetry topology, but to my misunderstanding of this resistance role in the working principle of the differential pair... I've simulated and built the Balanced Line Stage preamp, and I'm more than happy with it  (what a sound !!!), but I must admit I'm a complete newbie from the design point of view.I still can not figure out what is the relationship between the gain and this resistance (that's the meaning of the "X")... I've browsed all the threads on these forums, but perhaps I missed something... Can someone lend me a helping hand ? Thanks in advance,
__________________
François "Learning French is trivial: the word for horse is cheval, and everything else follows in the same way." |
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18th January 2002, 05:33 PM
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#5 |
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The one and only
Join Date: Mar 2001
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Ah yes, sometimes I forget that the world doesn't
revolve around my own endeavors..... |
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19th January 2002, 02:26 AM
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#6 | |
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Warp Engineer
On Holiday
Join Date: Oct 2001
Location: Queensland, Australia
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Quote:
but not quite
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