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Old 1st November 2005, 07:32 PM   #1
xyrium is offline xyrium  United States
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Default PS EMI filtering

Would it be worth placing one of these before the transformer of an amplifier. possibly on the mains before power input?

http://www.cor.com/PDF/VW.pdf

I have the V series model 10VV1 (two V's not a W)

The unit is rated for 10A and the fuse on my amp is rated at 8.7A. Schematics are in the PDF.

Thanks,
Paul
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Old 1st November 2005, 10:37 PM   #2
xyrium is offline xyrium  United States
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Here's the schematic
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File Type: jpg emi_filter.jpg (10.7 KB, 124 views)
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Old 2nd November 2005, 02:35 AM   #3
BWRX is offline BWRX  United States
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I have one in the power supply for my amp that was salvaged from a UPS that is very similar to the one you have. It's also rated at 10A but I replaced the fuse with a smaller one. They do help filter out the RF junk on the line and the stuff some amps spit back out. That's a fairly nice feature to have, especially if a toroidal transformer is used in your power supply.
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Old 2nd November 2005, 03:42 AM   #4
xyrium is offline xyrium  United States
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Hey BWRX,

Thanks for the input. Right now, I have an isolation transformer before the power input on the amp. I was thinking of wiring this filter in line with that, but I'm wondering if it would do anything since the iso xformer is there anyway.

I guess it can't hurt to try though!

Rgds,
Paul
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Old 2nd November 2005, 06:20 AM   #5
BWRX is offline BWRX  United States
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It certainly wouldn't hurt to try is right I'd place the line filter before the isolation transformer to help filter out the junk before it enters the transformer's windings but it really could go after it as well.
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