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Old 3rd April 2006, 08:22 AM   #11
APi is offline APi  Finland
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Join Date: Nov 2004
Location: Oulu
Quote:
Originally posted by ABJensen

This is my new ribbon. 150 cm long, 2 cm wide [/B]
How did you corrugated your ribbon ONLY vertically so that you don´t get any other wrinkles which may cause bad sound? What kind of tool do you have?

I tested similar idea last weekend with 10x2cm ribbon. It sound practically as good as free ribbon. The best thing was that this construction is absolutely no sensitive to air movement from bass, people, wind etc as traditional long ribbons are. Extremely practical magnetostatic line source!

But I found it pretty hard to corrugate it. My problem was that somehow you should be able to do corrugation without any other wrinkles. Horizontally it is easier since you need to press only 2cm of ribbon at time. But vertically you should ether press the whole length (which is impossible if you have 1-2m long ribbon) or have some kind of corrugeted wheels which to roll on the ribbon.

What is easiest way?
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Old 17th April 2006, 04:23 PM   #12
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Join Date: Jun 2005
Location: Neuss, Germany
Default Ribbon Tweeter

Just finished a smaller version of my ribbons - just 100 mm of membrane length and only to be used as a tweeter from 3 kHz up. This is my first ribbon with 6µ alu foil - very tricky to handle but also very goog impulse response.
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Old 25th April 2006, 03:54 PM   #13
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Made another ribbon.
Click the image to open in full size.

Click the image to open in full size.
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Old 15th March 2007, 10:17 PM   #14
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Join Date: Mar 2005
Location: copenhagen
I have made some ajustements. The ribbons look like a UU now. Now it allmost look like a fullrange driver.


http://www.hifi-musik.dk/richedit/up...0475068c85.jpg
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Old 18th March 2007, 03:58 PM   #15
tinitus is offline tinitus  Europe
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ABJensen, nice ribbon, be carefull not to burn that paper


Michael, you still make impressive documentation

But the reason why you dont measure any difference with iron at the ends, is because it simply dont work - you need to have curved iron from side to side across each magnet pair, to have an easy path fore the magnets and avoiding field stray(loss ?) - if thats the right word

Like this
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Old 18th March 2007, 05:53 PM   #16
tinitus is offline tinitus  Europe
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ABJensen, pictures are gone ... ? and last link dont work either ... ?

Will you discuss your constuction in detail .... maybe we could learn something ?

edit,... ahhh, I see, you are Andre and not the owner of first the linked site .... and found some nice details too "New Type of Ribbon - visiting Andre "
You must be one of the guys who have payed a small fortune in magnets
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Old 18th March 2007, 06:31 PM   #17
tinitus is offline tinitus  Europe
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Andre ......I would like to know the sensitivity of your ribbon ?
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Old 30th March 2007, 09:45 AM   #18
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Tinitus you just have too buy 1000 magnets. That bring the price down. The sensivity is 90-92 db.

André
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Old 3rd April 2007, 02:09 AM   #19
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Quote:
Originally posted by tinitus

But the reason why you dont measure any difference with iron at the ends, is because it simply dont work - you need to have curved iron from side to side across each magnet pair, to have an easy path fore the magnets and avoiding field stray(loss ?) - if thats the right word

Hi tinitus,
Would you kindly elaborate?
Do you mean a cylindrical magnet with a strip cut along the axis on the tube wall as the gap?

Cheers
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Old 30th December 2008, 11:46 AM   #20
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New design what do you think ?
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