Copper Foil

a.wayne · 07:58 PM

Has anyone ever attempted to use copper instead of Alloy foil for ribbon Speaker ?

http://www.stormcopper.com/art-craft...FZxS2godrgkqkg

LineArray · 08:38 PM

Could be a good material.

No personal experience.

The Dome Tweeter of the Celestion SL6 used copper
as membrane material AFAIK.

I personally liked the speaker.

Celestion SL6

I don't know but copper may have more damping and less stiffness
as AL.

A ribbon which has a well adjusted fs not too far below its usable
range and foil as thin as possible - why shouldn't it work ?

a.wayne · 23rd February 2010, 09:37 PM

Hello Oliver,

Yes i was thinking the same , going to give .001 copper foil a shot .....

geraldfryjr · 23rd February 2010, 09:37 PM

yes, i have toyed with the idea a few times.i found that it is much heavier than aluminium. 3.5 times more to be exact .i could not find any thin enough to use. a couple of years ago i found some 100% copper leaf at a craft store it is about .1mil thick. but it is only a 6" by 6" square.however i did manage to laminate it to some .25mil mylar and thats as far as i got. i had lost the sample i made but i still have the foil i used and plan to prusue that project again.it was from a company called gold leaf and i believe it is still availible.jer

woody · 23rd February 2010, 10:08 PM

I may be wrong but I think Norman Bates experemented with this with one of his ESG ribbon tweeters.

23rd February 2010, 07:52 PM	#1
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	Copper Foil Has anyone ever attempted to use copper instead of Alloy foil for ribbon Speaker ? http://www.stormcopper.com/art-craft...FZxS2godrgkqkg Last edited by a.wayne; 23rd February 2010 at 07:58 PM.

23rd February 2010, 08:23 PM	#2
LineArray diyAudio Member Join Date: Mar 2008	Could be a good material. No personal experience. The Dome Tweeter of the Celestion SL6 used copper as membrane material AFAIK. I personally liked the speaker. Celestion SL6 I don't know but copper may have more damping and less stiffness as AL. A ribbon which has a well adjusted fs not too far below its usable range and foil as thin as possible - why shouldn't it work ? __________________ Oliver, RFZ believer (?) www.dipol-audio.de Last edited by LineArray; 23rd February 2010 at 08:38 PM.

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23rd February 2010, 09:37 PM	#3
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	Hello Oliver, Yes i was thinking the same , going to give .001 copper foil a shot .....

23rd February 2010, 09:37 PM	#4
geraldfryjr diyAudio Member Join Date: Feb 2008 Location: Jackson,michigan	yes, i have toyed with the idea a few times.i found that it is much heavier than aluminium. 3.5 times more to be exact .i could not find any thin enough to use. a couple of years ago i found some 100% copper leaf at a craft store it is about .1mil thick. but it is only a 6" by 6" square.however i did manage to laminate it to some .25mil mylar and thats as far as i got. i had lost the sample i made but i still have the foil i used and plan to prusue that project again.it was from a company called gold leaf and i believe it is still availible.jer

23rd February 2010, 10:08 PM	#5
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	I may be wrong but I think Norman Bates experemented with this with one of his ESG ribbon tweeters.

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