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Marantz CD63 & CD67 mods list
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Old 20th January 2010, 10:03 AM   #13951
SimontY is offline SimontY  United Kingdom
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Quote:
Originally Posted by martin clark View Post
...at 240v/50z 4n7 will pass enough current to give you a belt, and 0.47uF far more than enough to kill you.
So is this a bad time to mention the audio website that advocates putting 1000uF across neutral and earth?

I agree sonically it's a mixed bag with mains filters but even though I don't understand the higher levels of reasoning I can't agree as to just why it's a mixed bag. Personally I think there are more factors than your local mains and system, I think a lot is down to how you design the filter. With the smaller caps across L & N there's not much or anything audible to be gained, but stick a 10uF lighting cap there and it can sound smoother and more open with deeper bass... odd. Risk sticking 10uF across N & E and it gets better again.

Then there are the more complex arrangements and filters using transorbs, gas arrestors and such, but for those more special carefully thought out designs I'd just recommend buying one of Brent's nice products to save killing yourself etc

Simon
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Old 20th January 2010, 10:04 AM   #13952
SimontY is offline SimontY  United Kingdom
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Originally Posted by Malefoda View Post
DIYFridge.com, new & cool!
Post of the day!!!
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Old 20th January 2010, 10:19 AM   #13953
martin clark is offline martin clark  Europe
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Quote:
So is this a bad time to mention the audio website that advocates putting 1000uF across neutral and earth?
Tell me you are joking; that's insane.

The sole point of the Earth wire is as a protective conductor to deal with fault conditions. 1000uF effectively shorts it to N, completely defeating the safety aspect

Incidentally, 1000uF would pass c.80A of reactive current at 240v!

Last edited by martin clark; 20th January 2010 at 10:22 AM.
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Old 20th January 2010, 10:49 AM   #13954
RCruz is offline RCruz  Switzerland
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My new thread..... http://www.diyaudio.com/forums/solid...ml#post2054690

Hope some of you will care to give me a little help
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Old 20th January 2010, 11:26 AM   #13955
SimontY is offline SimontY  United Kingdom
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Quote:
Originally Posted by martin clark View Post
Tell me you are joking; that's insane.
I was a little off with my values but here's the article:
Magnan Audio Cables Web Site - Tweaks: Do-it yourself approach to AC line filtering

Simon
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Old 20th January 2010, 12:46 PM   #13956
martin clark is offline martin clark  Europe
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I'd forgotten about that link. Full of poor erroneous info - a shocker
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Old 20th January 2010, 02:52 PM   #13957
UV101 is offline UV101  England
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Quote:
Originally Posted by Malefoda View Post
DIYFridge.com, new & cool!
Quote:
Originally Posted by martin clark View Post
I'd forgotten about that link. Full of poor erroneous info - a shocker
Thats terrible!!! you should both be in the sinbin!!!!
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Old 20th January 2010, 05:02 PM   #13958
RCruz is offline RCruz  Switzerland
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After a fast TX swap, the machine is playing perfectly.

While I was hands on the iron, I replaced the 500000u // C815 by a much smaller 10000u BHC that fits inside the case.

Now I must wait to be able to report the sonic alterations.

Ricardo
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Old 20th January 2010, 05:04 PM   #13959
SimontY is offline SimontY  United Kingdom
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I wonder what that will do too. I look forward to hearing about it.

Simon
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Old 20th January 2010, 05:21 PM   #13960
RCruz is offline RCruz  Switzerland
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In my CDP, C815 (after the main 5vreg) feeds only the uCon, display and lazer mech.

I know it is too soon.... this machine only sounds at its best after min 30min playing but I notice a reduction in the bass presence. The bass became more detailed and integrated. There is also more presence in the mids (power zone) so the stereo imagery is improved.

Can not comment on the highs... too soon.
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