Anybody can identify that EMI filter?

Peter Daniel · 27th January 2004, 01:31 AM

I'm trying to source this type of EMI filter for my DAC. Any idea where I can find it? This one belongs to ML39 board.

icceman · 27th January 2004, 02:02 AM

Multiple XY Capacitors? (Class X2 & Y2 together)
http://www.evox-rifa.com/cap_catalog/deltaemi/pzb300.pdf

Peter Daniel · 27th January 2004, 02:47 AM

I don't think it's what you linked. What I'm looking for consists of two inductors shunted by a cap.

Digi-Key carries similar product http://dkc3.digikey.com/PDF/C041/0705.pdf
with frequency ranging from 10 to 60MHz. Any recommendation which value is most suitable for a DAC circuit?

Cobra2 · 27th January 2004, 03:24 AM

PerAnders have used these in some of his projects...:
http://home8.swipnet.se/~w-80046/hif...0schema_p2.pdf
(PSU for RIAA)
http://home.swipnet.se/~w-50719/hifi/qsxm3/index.html

Arne K

Algar_emi · 27th January 2004, 03:48 AM

The logo of the part: LF seems to indicate that is a part made by LittelFuse, probably a Feedthrough EMI Filter, probably L-C-L configuration. The 103 is probably the Capacitor value or 0.01uF.
It is probably an obsolete part. Just a suggestion...

Bye...

SB

hjelm · 2nd February 2004, 11:20 AM

I thimk it is a MuRata EMI filter EMIFIL

It is a L C L filter but i only know where to get it in sweden.

Christer · 2nd February 2004, 11:37 AM

Peter,

I have two of those, but labelled 102 instead of 105. They are sold
as EMI filter DSS306 EMIFIL. Built up from two ferrite beads and
a 1000pF ceramic cap, to be used for filtering out the range
1 - 1000 MHz. If you google for those, you will probably find the
other variants too. Hope it can help you to find them.

Peter Daniel · 2nd February 2004, 02:00 PM

Thanks guys, it definitely looks like Murata. I knew that sooner or later the correct answer would pop up.

Peter Daniel · 2nd February 2004, 02:37 PM

And this is the pic for those who rightly claim that ML gear is parts farm

peranders · 2nd February 2004, 02:50 PM

Peter you are looking for a plain "MuRata"-filter. Notice that they more or less demands groundplane in order to get low inductance in the center pin. This is very important if you want out the most of the filter.
You can see the filters behind the big blue caps, small brown things. Note also that I have groundplane so the filters have good working conditions.

http://home5.swipnet.se/~w-50674/hif.../qsxm3_top.jpg

They can be bought here, also worldwide.
http://www.elfa.se/elfa/produkter/se/2012678.htm

27th January 2004, 03:24 AM	#4
Cobra2 DIY ! diyAudio Member Join Date: Apr 2002 Location: Stavanger, Norway	PerAnders have used these in some of his projects...: http://home8.swipnet.se/~w-80046/hif...0schema_p2.pdf (PSU for RIAA) http://home.swipnet.se/~w-50719/hifi/qsxm3/index.html Arne K __________________ Ars longa, vita brevis

27th January 2004, 03:48 AM	#5
Algar_emi diyAudio Member Join Date: Oct 2002 Location: Canada, Qc	Part made by LittelFuse The logo of the part: LF seems to indicate that is a part made by LittelFuse, probably a Feedthrough EMI Filter, probably L-C-L configuration. The 103 is probably the Capacitor value or 0.01uF. It is probably an obsolete part. Just a suggestion... Bye... SB

2nd February 2004, 11:20 AM	#6
hjelm diyAudio Member Join Date: Nov 2003 Location: Västerås	I thimk it is a MuRata EMI filter EMIFIL It is a L C L filter but i only know where to get it in sweden. __________________ Hjelm

2nd February 2004, 02:50 PM	#10
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Peter you are looking for a plain "MuRata"-filter. Notice that they more or less demands groundplane in order to get low inductance in the center pin. This is very important if you want out the most of the filter. You can see the filters behind the big blue caps, small brown things. Note also that I have groundplane so the filters have good working conditions. http://home5.swipnet.se/~w-50674/hif.../qsxm3_top.jpg They can be bought here, also worldwide. http://www.elfa.se/elfa/produkter/se/2012678.htm __________________ /Per-Anders (my first name) or P-A as my friends call me

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

27th January 2004, 02:02 AM	#2
icceman diyAudio Member Join Date: Jun 2002 Location: Singapore	Multiple XY Capacitors? (Class X2 & Y2 together) http://www.evox-rifa.com/cap_catalog/deltaemi/pzb300.pdf

27th January 2004, 02:47 AM	#3
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I don't think it's what you linked. What I'm looking for consists of two inductors shunted by a cap. Digi-Key carries similar product http://dkc3.digikey.com/PDF/C041/0705.pdf with frequency ranging from 10 to 60MHz. Any recommendation which value is most suitable for a DAC circuit?

2nd February 2004, 11:37 AM	#7
Christer diyAudio Member Join Date: Sep 2002 Location: Sweden	Peter, I have two of those, but labelled 102 instead of 105. They are sold as EMI filter DSS306 EMIFIL. Built up from two ferrite beads and a 1000pF ceramic cap, to be used for filtering out the range 1 - 1000 MHz. If you google for those, you will probably find the other variants too. Hope it can help you to find them.

2nd February 2004, 02:00 PM	#8
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Thanks guys, it definitely looks like Murata. I knew that sooner or later the correct answer would pop up.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Old new bee needs help to Identify	NDtreehugger	Solid State	8	29th August 2008 04:02 PM
need help wana change 60-Hz twin-T notch filter to 279 Hz filter	prorms	Solid State	0	9th February 2008 11:38 PM
Help me identify this?	peace brainerd	Solid State	11	3rd August 2006 05:22 PM
active filter from rod elliot and sub filter questions	wuffer	Parts	0	2nd October 2005 01:12 PM
chassis-mounted filter or IEC plug filter	jarthel	Solid State	7	11th March 2002 10:17 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read