WTB: In Line IEC Mains Filter

[Flanders]

Hi folks,
I'm new here and I thought I'd start off on the front foot by placing this WTB.

Wanted:
In-Line IEC Mains Filter

It seems Mains Cables R Us make some good quality stuff and I'm hoping someone might have a spare they don't use.
This is the type I'm talking about:
http://www.mains-cables-r-us.co.uk/mains-filters/509-optimus-in-line-mains-filter.html?search_query=in+line+mains+filter&results=2

I'm open to other brands of course, but I'm not familiar with others.
It'll be used in front of my old Quad 66 CD Player, which I'm hoping will benefit from cleaner mains.

Postage to Australia, which I'm prepared to cop.

Thanks,
Ben

[Flanders]

Found.
Bought one locally - see signature.

[Puffin]

Strange site that. Can't see how you buy anything, or an explanation of the filter, nor any price?

[Flanders]

Rob,
The guy (Mark) is active on Stereonet (an Aussie forum). He makes the odd item here and there at people's request and sometimes puts his amplifier/speaker creations up for sale as well.
His DC blocker incorporates an EMI/RFI filter.

[Puffin]

I was wondering what the purpose of the bridge rectifier was in there?

[struth]

I cant see any pics of inside?

If its a dc blocker then it may be there to protect the caps

[Firebottle]

I was wondering what the purpose of the bridge rectifier was in there?

http://2.bp.blogspot.com/-5z7dpEPFdFE/UpBhm2ywr0I/AAAAAAAAAzQ/7k7ebnwuXFQ/s1600/FinishedInside.jpg

It's part of the DC blocker function, along with the two electrolytic caps.

[struth]

;)

[Puffin]

http://2.bp.blogspot.com/-5z7dpEPFdFE/UpBhm2ywr0I/AAAAAAAAAzQ/7k7ebnwuXFQ/s1600/FinishedInside.jpg

It's part of the DC blocker function, along with the two electrolytic caps.

The proprietary black cased filter at the input (R of pic) is AC (I am assuming it is the same as those I have used in the past) the BR appears to have 2 of it's terminals bridged with the live connected across the bridge. Am I right to assume that the outgoing voltage is AC, if so what is the bridge doing?

[Flanders]

Rob, I'm stupid, but there's a thread about it here:
http://www.stereo.net.au/forums/index.php/topic/75501-dc-blockers-diy-effective-and-simple/

[Firebottle]

The bridge is limiting the voltage across the capacitors.

The best description of why and how is this http://sound.westhost.com/articles/xfmr-dc.htm

:)

[Puffin]

Ben says that he is stupid......join the club. I now remember building something like this many years ago, not sure if it worked or not:D

http://i73.photobucket.com/albums/i239/saxonsex/DC_Blocker01_zpsgc6zia8m.jpg

I assume the proprietory bridge works in the same way.

[Flanders]

The bridge is limiting the voltage across the capacitors.

The best description of why and how is this http://sound.westhost.com/articles/xfmr-dc.htm

:)

Yeah, that's the one Alan.

[mwhouston]

The bridge is designed to keep the AC voltage across the caps to about 1.4V. The caps form a non-polarised 2000uf plus single cap by connecting positives together. The AC mains passes through the caps to your gear but leaves behind the DC which is on all AC mains. The DC Duffers have a ferrite choke on the power cord mains side and an EMI\RFI filter after the DC blocker section. Also I fuse the unit to 4A. These days they are built in ABS enclosures. Any plugs or sockets can be fitted.

Most report an instantaneous improvement in sound even with other power conditioners after the blocker. Any audio gear with a toroidal transformer is badly effected by even a few milliamps of DC.