SMPS for F5

stoc005 · 3rd June 2009, 04:19 PM

http://cgi.ebay.com/24V-DC-6A-145W-R...arms=72%3A1205|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A0|293%3A1| 294%3A50

Here is a 24v 6A switching supply for very little $$$. Free shipping too. I can't buy a decent transformer and caps for that little. The brand is Meanwell and we use them here at work so I know they do work and have been reliable. A big plus is the current limiting too.

Since (2) 24v supplies are needed to build an F5, wouldn't this be a reasonable way to power the amp?? I do think that a SMPS should be remote from the main amp chassis with plenty of EMI/RFI filtering between the two. Obtaining high current connectors are not a problem either, I think. Am I missing something here??

Thanks for any comments,
Bill

astouffer · 3rd June 2009, 04:34 PM

SMPS tend to get a bad reputation by the audio community. The PS in that link lists the switching frequency as 25Khz which is pretty low. I would want something much higher, say 100Khz minimum.

If you did go the SMPS route I would add some more low ESR caps and ferrites to clean up any leftover noise or ripple. Of course an oscilloscope will greatly help

juma · 3rd June 2009, 04:36 PM

You'll need four of those to power two channels of F5. That's 160 bucks. For that amount of money you can build proper PSU for F5, right ?

3rd June 2009, 04:19 PM	#1
stoc005 diyAudio Member Join Date: Feb 2007 Location: Midwest in the USA	SMPS for F5 http://cgi.ebay.com/24V-DC-6A-145W-R...arms=72%3A1205\|66%3A2\|65%3A12\|39%3A1\|240%3A1318\|301%3A0\|293%3A1\| 294%3A50 Here is a 24v 6A switching supply for very little $$$. Free shipping too. I can't buy a decent transformer and caps for that little. The brand is Meanwell and we use them here at work so I know they do work and have been reliable. A big plus is the current limiting too. Since (2) 24v supplies are needed to build an F5, wouldn't this be a reasonable way to power the amp?? I do think that a SMPS should be remote from the main amp chassis with plenty of EMI/RFI filtering between the two. Obtaining high current connectors are not a problem either, I think. Am I missing something here?? Thanks for any comments, Bill

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3rd June 2009, 04:34 PM	#2
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	SMPS tend to get a bad reputation by the audio community. The PS in that link lists the switching frequency as 25Khz which is pretty low. I would want something much higher, say 100Khz minimum. If you did go the SMPS route I would add some more low ESR caps and ferrites to clean up any leftover noise or ripple. Of course an oscilloscope will greatly help

3rd June 2009, 04:36 PM	#3
juma diyAudio Member Join Date: Nov 2005 Location: Zemun	You'll need four of those to power two channels of F5. That's 160 bucks. For that amount of money you can build proper PSU for F5, right ?

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