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Old 19th August 2012, 11:27 AM   #661
fas42 is offline fas42  Australia
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Originally Posted by Kindhornman View Post
If what we are attempting to do is keep the voltage on the +/- rails from dropping or sagging as you say, is there an ultimate value for this. If we just increase the power capacitor value to some excess value then the slew rate becomes important and we have a problem with charging the capacitor bank fast enough.? If to small a capacitor rating the voltage drops. What are we matching the expected output of the amp plus and loss to heat in the output devices?
That's the point to this thread. I believe there is no simple answer, because it depends on a) the capacity, the rating of the transformer(s), b) the size and quality of the capacitor bank, and c) the PSRR of the amp, for both positive and negative rails, just for starters.

Also, do we want the amp to withstand heavy duty testing by a reviewer, just to be able to claim to be the next Krell, or merely to handle the demands of normal music content.

Frank

Last edited by fas42; 19th August 2012 at 11:39 AM.
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Old 19th August 2012, 11:31 AM   #662
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Right, we're getting there. You like most valve amps, a few old SS ones, and assume anyone who builds stuff for themselves hasn't a clue what they're doing.
I didnt say that since Stasis was also home build.
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Old 19th August 2012, 11:47 AM   #663
AndrewT is offline AndrewT  Scotland
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It can't be Stasis if home built.
Did you build a Stasis clone? or copy?
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Old 19th August 2012, 11:53 AM   #664
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the first serie stasis from Threshold was home build. Mine is a Nakamichi but you can copy it for own purpose. The schematic is on Internet and it isnt critical to build. It even doesnt needs a capacitor multiplier or smps.

Last edited by liching1952; 19th August 2012 at 11:56 AM.
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Old 19th August 2012, 11:57 AM   #665
AndrewT is offline AndrewT  Scotland
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Originally Posted by liching1952 View Post
.............. It even doesn't needs a capacitor multiplier, nor smps.
Why are you continuing to bring this back into the discussion?
If you have new information on these that needs discussion that would be relevant to the topic then discuss, else leave it alone.
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Old 19th August 2012, 12:08 PM   #666
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Power supply sag cant be a problem in a good design. One designes an amp with a certain power supply voltage. Then the power supply must be designed to deliver that voltage at mayimum current. Thats all, the voltage will be higher when the current draw is lower but thats not a problem.
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Old 19th August 2012, 12:22 PM   #667
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I don't know about you, but speaking for one of the ECX10N20's I have here: "Mmmm I like current, and when I want it.. I want it.. NOW!".
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Old 19th August 2012, 12:28 PM   #668
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I have a couple of original late '80s bought Partridge output transformers looking at me, they're saying they'd like a CLC to feed them.
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Old 19th August 2012, 12:29 PM   #669
AndrewT is offline AndrewT  Scotland
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Does that mean you would like to see/use a "rule of thumb" to estimate the C & C of your CLC?
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Old 19th August 2012, 12:29 PM   #670
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Originally Posted by MagicBox View Post
I don't know about you, but speaking for one of the ECX10N20's I have here: "Mmmm I like current, and when I want it.. I want it.. NOW!".
Power= U^2/R or I^2.R so its all the same.
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