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DIY weighted diaphragm stretcher (pic)
DIY weighted diaphragm stretcher (pic)
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Old 12th October 2007, 08:48 PM   #21
Paul Ranson is offline Paul Ranson  England
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The Quad 63 coating is two layers, a white sublayer and then the grey coating. The photo is presumably of the application of the white stuff.

I've used a variation of the (I think) 'I Forgot' inspired inner tube stretcher,

Click the image to open in full size.

Using an open frame both sides of the stretched film are accessible.

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Old 12th October 2007, 11:43 PM   #22
I_Forgot is offline I_Forgot  United States
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The coating on the drivers in my 63s sure looked brushed on to me. Maybe they changed their process at some point in their many year production history.

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Old 4th November 2007, 12:12 AM   #23
harry_at is offline harry_at  Austria
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Join Date: Jun 2006
Location: Austria
Hello to all,

seems to be a stretching jig contest. So here is mine. Looks like the great brother from Arend-Jans jig - but it has more clamps on the short sides similar to the original 63´stretcher. This beast is two meters long and fills the room...all for my Quads.

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Old 4th November 2007, 01:09 AM   #24
arend-jan is offline arend-jan  Netherlands
Join Date: May 2006
Location: Netherlands
Very very nice!

Increasing the number of clamps is indeed a logical improvement which I considered at one point too, but I decided to stay as close as possible to the original as to not introduce more unknowns to the equation.

Mind if I contact you privatly?
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Old 3rd April 2008, 08:54 AM   #25
GlidingDutchman is offline GlidingDutchman  South Africa
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Any ideas on building a jig to refurb Martin Logan CLS II panels?

Big - very big...

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Old 3rd April 2008, 12:37 PM   #26
Calvin is offline Calvin  Germany
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Location: close to Basel

basically like in post #10. Just use 1 beam at the ends not such a complicated lever construction. This beam needs to have a curved surface equal to the panel´s curvature. But build it stiff! There will develop considerably high forces when stretching the membrane.

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