is it possible to make a transformer out of choke?

44250 · 2nd July 2011, 06:33 AM

I have found the muffle core of a public lighting that looks exactly like EI transformer core,only the middle pillar is a 3mm shorter than two side pillars. If i would rewind it into a transformer i would make it E/I/E/I/E/I/E alternating side of each layer one after other,but my question is-is it worth trying,what would be the result? Would it be reliable transformer or something that might work,BUT... ? Here are some pictures...

Thanks for your answers in advanced!

jan.didden · 2nd July 2011, 07:33 AM

I think you call this a 'choke'. A muffler is the sound pipe underneath a car....
You could send a message to the moderators to change the title.

jan didden

pinkmouse · 2nd July 2011, 07:45 AM

Done. I suspect Google translate!

44250 · 2nd July 2011, 07:51 AM

Are you fast!

Yes,it is google translator...it mostly translates good,but technical words are often "misstranslated". As it is written above, i'm sorry for grammar errors...

Thanks for Your understandig!

Andy815408 · 2nd July 2011, 08:10 AM

It will work as a transformer but it wont be very efficient because of the air gaps.

Chokes and Transfromers have different magnetic requirements.

44250 · 2nd July 2011, 09:34 AM

Ok,I thought so... Well than,I will turn the magnetic core back and exchange it for something else.

Thank you for the answer!

sreten · 2nd July 2011, 10:24 AM

Hi,

It would work if you rotated every other layer so there is no air gap.

It would saturate first at the point of the air channels, effectively
meaning you have less iron in the core than it would first appear.

Those air channels would not cause inefficiency, it will work.

rgds, sreten.

DF96 · 2nd July 2011, 01:23 PM

Use for an SE amp, although the gap looks a bit big even for that.

44250 · 2nd July 2011, 10:31 PM

I have decided to turn them back and wait for better chance with other transformer core...I have four of these and it is too much job and not much profit. If I have to make it by my hands,I´ll try to make it worth. Thanks for advices everyone!

ebattleon · 3rd July 2011, 02:30 AM

Cut the Legs back to the same length as the center pillar...with a sharp shears. Then file and lap the edges en mass by clamping in a vice. Alas too late because you returned them;(

2nd July 2011, 07:33 AM	#2
jan.didden diyAudio Member Join Date: May 2002 Location: Great City of Turnhout, Belgium Blog Entries: 6	I think you call this a 'choke'. A muffler is the sound pipe underneath a car.... You could send a message to the moderators to change the title. jan didden __________________ /Yes! Its out: Linear Audio Vol 5! I'm not an "accademic", just a plodder who loves a challenge - Ian Hegglun

2nd July 2011, 07:45 AM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Done. I suspect Google translate! __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

2nd July 2011, 07:51 AM	#4
44250 diyAudio Member Join Date: Jan 2011 Location: Ugrinovci-Zemun-BELGRADE	Are you fast! Yes,it is google translator...it mostly translates good,but technical words are often "misstranslated". As it is written above, i'm sorry for grammar errors... Thanks for Your understandig! __________________ sorry for possible grammar errors... visit http://www.facebook.com/profile.php?id=100002606156494 http://www.facebook.com/media/albums...32238633531205

2nd July 2011, 09:34 AM	#6
44250 diyAudio Member Join Date: Jan 2011 Location: Ugrinovci-Zemun-BELGRADE	Ok,I thought so... Well than,I will turn the magnetic core back and exchange it for something else. Thank you for the answer! __________________ sorry for possible grammar errors... visit http://www.facebook.com/profile.php?id=100002606156494 http://www.facebook.com/media/albums...32238633531205

2nd July 2011, 10:24 AM	#7
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, It would work if you rotated every other layer so there is no air gap. It would saturate first at the point of the air channels, effectively meaning you have less iron in the core than it would first appear. Those air channels would not cause inefficiency, it will work. rgds, sreten. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow


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2nd July 2011, 08:10 AM	#5
Andy815408 Banned Join Date: Jul 2011	It will work as a transformer but it wont be very efficient because of the air gaps. Chokes and Transfromers have different magnetic requirements.

2nd July 2011, 01:23 PM	#8
DF96 diyAudio Member Join Date: May 2007	Use for an SE amp, although the gap looks a bit big even for that.

2nd July 2011, 10:31 PM	#9
44250 diyAudio Member Join Date: Jan 2011 Location: Ugrinovci-Zemun-BELGRADE	I have decided to turn them back and wait for better chance with other transformer core...I have four of these and it is too much job and not much profit. If I have to make it by my hands,I´ll try to make it worth. Thanks for advices everyone! __________________ sorry for possible grammar errors... visit http://www.facebook.com/profile.php?id=100002606156494 http://www.facebook.com/media/albums...32238633531205

3rd July 2011, 02:30 AM	#10
ebattleon diyAudio Member Join Date: Jun 2011	Cut the Legs back to the same length as the center pillar...with a sharp shears. Then file and lap the edges en mass by clamping in a vice. Alas too late because you returned them;(

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