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Old 25th January 2010, 05:54 PM   #14001
UV101 is offline UV101  England
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Quote:
Originally Posted by 6h5c View Post
Hey, hey, post nr. 14000!!!
awesome! and indeed!
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Old 25th January 2010, 07:52 PM   #14002
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Originally Posted by 6h5c View Post
Hey, hey, post nr. 14000!!!
A good thread you started here, mate !!!


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Old 25th January 2010, 08:05 PM   #14003
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Yep, I can't agree more!
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Old 25th January 2010, 08:08 PM   #14004
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I agree.... This is the main thread !!!
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Old 26th January 2010, 07:44 AM   #14005
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Originally Posted by 6h5c View Post
I use a C-L-C filter with a 32+32uF (2.5mohm) and a 100+100uF (0.8mohm), and behind that a 50+50uF (1.6mohm) for the driver and preamp stage. All are the radial HV types.

<STRIKE>I think you have a typo on your website, 22 ohm is a bit high </STRIKE>

EDIT: ESR is measured at 100Hz with these, but a few mohm is low, could they really be that low??? I just copied the numbers from the Mundorf datasheet... Your's look more feasable Brent.

Ray
Hi Ray

Mundorf had a typo on some their pdfs, originally their 25V 22000uF stated 0.22 ohm which was too low. The updated sheet then stated 22 ohm. Comparing that with a 25V 22000 BHC Aerovox with 48 ohm @ 100Hz.

Those Oscon SEPC 6.3V 470uF I use on digital rails have an esr of 0.07 ohm @ 100Khz & ripple rated @ 5600 mA!!

Great thread this, I can't see it dying for quite a long time yet.

Brent
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Old 26th January 2010, 09:44 AM   #14006
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Quote:
25V 22000 BHC Aerovox with 48 ohm @ 100Hz.
Those numbers all have to be mOhm, the reactance of a 22000uF cap at 100Hz is only 0.07ohms!
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Old 26th January 2010, 10:45 AM   #14007
RCruz is offline RCruz  Switzerland
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There is really a big difference between 22 ohm and 22mohm.

I guess 22mohm look low but would not 22ohm make the caps too slow for audio ?

Last edited by RCruz; 26th January 2010 at 11:01 AM.
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Old 26th January 2010, 10:58 AM   #14008
Thomo is offline Thomo  United Kingdom
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yeh, that's another Mundorf typo, lol.

Definitely mOhm
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Old 26th January 2010, 11:10 AM   #14009
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Originally Posted by martin clark View Post
Those numbers all have to be mOhm, the reactance of a 22000uF cap at 100Hz is only 0.07ohms!
I looked at the figures and emailed F&T and they confirmed Mundorf had got it wrong. So the figure is 22 mOhm. Thanks for pointing that out guys.

Brent
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Old 26th January 2010, 11:37 AM   #14010
RCruz is offline RCruz  Switzerland
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Well, in that case these caps must really sound very good.

IMO, low ESR is fundamental for overall definition.

In attach you can find my collection of low ESR caps with values.

Recently found a BC components (Philips) 22.000uF 63v with 5mohm ESR !
Attached Files
File Type: zip Low esr caps.zip (8.9 KB, 27 views)

Last edited by RCruz; 26th January 2010 at 11:47 AM.
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