PS EMI filtering

xyrium · 1st November 2005, 07:32 PM

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

xyrium · 1st November 2005, 10:37 PM

Here's the schematic

BWRX · 2nd November 2005, 02:35 AM

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.

xyrium · 2nd November 2005, 03:42 AM

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

BWRX · 2nd November 2005, 06:20 AM

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.

1st November 2005, 07:32 PM	#1
xyrium diyAudio Member Join Date: Apr 2005 Location: NJ	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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2nd November 2005, 02:35 AM	#3
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	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.

2nd November 2005, 03:42 AM	#4
xyrium diyAudio Member Join Date: Apr 2005 Location: NJ	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

2nd November 2005, 06:20 AM	#5
BWRX diyAudio Moderator Emeritus Join Date: Jan 2005 Location: Pennsylvania	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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