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Old 11th June 2011, 07:29 AM   #1
brunob is offline brunob  Germany
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Default Pistonic corrugation

Beyer ribbon Microme have a special corrugated ribbon:

Click the image to open in full size.
The picture is from this thread: Beyer M160 ribbon mic


The central part is rigidified whereas the sides act like a suspension. Has anyone tried such corrugation for a speaker?


Bruno
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Old 11th June 2011, 11:44 PM   #2
a.wayne is offline a.wayne  United States
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Corrugation hurts the midrange IMO, so i have created the suspension at the ends for tensioning and low freq response and left the middle smooth , best compromise so far .

Corrugating the tweeter does work .....
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File Type: jpg Hi-Fi system 2010 029.jpg (595.9 KB, 277 views)

Last edited by a.wayne; 11th June 2011 at 11:48 PM.
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Old 13th June 2011, 10:55 PM   #3
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I did make a multi striped ribbon shaped like that, But I never got to test it,many many years ago.
As of last year I still had it,But now I can't find it as I was going to post a picture of it to show my etching technique on another thread.

I used copper foil etched and then sandwiched in between two layers of .25mil mylar with a very very thin layer of rubber cement.
I was exteremly light and the long folds gave it alot of rigidity.
And it did not readily bend easily.
I was messing around with ribbon designs from 1992 to 1998.

jer

Last edited by geraldfryjr; 13th June 2011 at 11:04 PM.
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Old 15th June 2011, 03:09 AM   #4
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Hi,

i have shown this one before, but it does not move
pistonic, it bends preferably around the vertical
axis ...
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File Type: jpg BändchenNahGross.jpg (43.6 KB, 227 views)
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Old 22nd June 2011, 03:53 PM   #5
brunob is offline brunob  Germany
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Quote:
Originally Posted by a.wayne View Post
Corrugation hurts the midrange IMO, so i have created the suspension at the ends for tensioning and low freq response and left the middle smooth , best compromise so far .

Corrugating the tweeter does work .....
I came accross this patent:
Ribbon Loudspeaker Having Corregated Ribbon For Reducing Distortion

In this patent, the corrugations at the two ends are 5 times larger than in the middle.The goal is to reduce the "snaking" of the ribbon - I am not sure what that means.
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Old 22nd June 2011, 04:40 PM   #6
brunob is offline brunob  Germany
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Quote:
Originally Posted by LineArray View Post
Hi,

i have shown this one before, but it does not move
pistonic, it bends preferably around the vertical
axis ...
Found: To ESL or to Ribbon?
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Old 22nd June 2011, 04:49 PM   #7
brunob is offline brunob  Germany
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Quote:
Originally Posted by a.wayne View Post
Corrugation hurts the midrange IMO, so i have created the suspension at the ends for tensioning and low freq response and left the middle smooth , best compromise so far .

Corrugating the tweeter does work .....
The speaker shown in the pictures looks interesting. Is there more information/details available somewhere?


Thanks,

Bruno
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Old 22nd June 2011, 08:40 PM   #8
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by brunob View Post
I came accross this patent:
Ribbon Loudspeaker Having Corregated Ribbon For Reducing Distortion

In this patent, the corrugations at the two ends are 5 times larger than in the middle.The goal is to reduce the "snaking" of the ribbon - I am not sure what that means.
The ribbon tends to bend like a snake after full corrugation making it difficult to tension and kept straight. If you want ( and you want ) tight magnetic gaps he is using the bigger folds to get the ribbon tensioned straight without "S" bends (snaking).....


regards,
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