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#1 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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I need a detailled schematic diagram from the power amplifier about
Krell mra image by MrAcoustat on Photobucket developed from http://www.audioreference.de/content...c_krell_01.jpg Here some additional weblinks about this power amp: StereoTimes - Event - A Visit to Krell by Steve Ekblad http://www.premieraudio.ca/uploads/images/MRA_Amp.jpg http://www.audio-kontakt.com/forum/n...Krell_MRA3.jpg www.audio-kontakt.com :: Poglej temo - Trafo in watti (scoll down for three additional photos) I need it for calculate a new ultimate quality (external) power supply for a currently user. There are Wilson Audio X1 (X-1) loudspeakers in use like the follow http://bedzine.com/blog/wp-content/u...2_vl3ls_12.jpg Because there are now big monolitic MKP capacitors (8000 uF !!!) in ultimate quality on the market, a great enhancement in sonic quality must be possible (compare to the original conditions). http://www.powersmartsystems.ru/file...nk/LNK-P5X.pdf I have even heard about monothitic 50.000 uF MKP, unfortunately I haven't see, because this must be custom made devices in very large sizes. Unfortunately one must be calculate very high costs for such cases (much more than the best available electrolytic capacitors) and it must be present absolutely perfect inrush current limiting devices (because internal resistance near zero ohms). Due such high costs by this kind of capacitors even by the world's most expensive amplifier such capacitors are not in use, e. g. FM Acoustic, Ultrasound, Audionote, Goldmund, Halcro and some more - look about HigherFi-Ultimate - The Worlds Best and Most Expensive Audio Amp and Amplifier Therefore the highest possible sonic quality is still hard limited, regardless of the price range and and regardless of the advertising slogans I am very happy to get a service manual (at least a schematic about power supply) of the Krell "Master Reference Amplifier" to realize this power supply project Last edited by tiefbassuebertr; 4th December 2009 at 08:08 PM. |
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#2 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Here some additional MKP capacitors up to 24000 uF ( !!! )
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#3 |
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diyAudio Member
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impressive, any idea where to get these?
__________________
If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert |
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#4 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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From there:
ELECTRONICON Kondensatoren und Filterkreis Drosseln > Home > HOME cause the exhibition start "HANNOVER MESSE 2010" today try to ask in two weeks ask there (button "Kontakt") for your local distributor An English homepage version is now also available. Service Manual for Krell "Master Reference Amplifier" still needed. Last edited by tiefbassuebertr; 20th April 2010 at 12:52 AM. |
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#5 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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schematic for this amplifier still wanted
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#6 |
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diyAudio Member
Join Date: Dec 2003
Location: frankston VIC
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krell don't release schematics, good luck!
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#7 | |
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diyAudio Member
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Quote:
![]() Hannes EDIT: if you have access to the amp, why not trace out the schematic and make everybody happy here?
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fresh matched IRFP240/IRFP9240 fets || AlephJ/JX-kitsF5 transistor kits || Burning Amp BA-1/2 transistor kits |
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#8 |
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diyAudio Member
Join Date: Mar 2008
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This is the best I can find. There are 48 capacitors in total in the power supply. I think they are made by epcos.
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#9 |
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diyAudio Member
Join Date: Jul 2005
Location: D-55629 Schwarzerden
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Even Accuphase release their schematics - go to
http://wegavision.pytalhost.com/accuphaseM-1000p/ perhaps one of the member have perform a "reverse engineering". Last edited by tiefbassuebertr; 8th June 2011 at 10:05 AM. |
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#10 | |
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diyAudio Member
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Quote:
__________________
If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert |
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