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Old 1st February 2012, 02:53 PM   #161
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Hi Brian

Made a frame of wood and drilled holes through the sides and put long screw's in.
Then I glue the frame to mylar.
I put a aluminum profile over the screw's and mount springs.
Attach the profile to the speaker mdf and now I can adjust the tension of the mylar.
Then I use aluminum tape 9mm wide from farnell for the conductors.

Rob
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Old 2nd February 2012, 08:29 AM   #162
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Quote:
Originally Posted by von.ah View Post
Henry, you are a maniac. In the best possible way. I marvel at all your work.
Some more for you to marvel at!! Finished latest design using 80 meters of 4.5 mm wide tape. The first 45 meters ran out before I realized. So the diaphragm is in 2 unequal parts which caused problems when wiring in parallel and the top half is louder than the bottom half. You live and learn. It is running with my first epsilon layout design (with the glued magnets) The small A4 sized design is my next rebuild. Then I may finish my planar headphones next.
Attached Images
File Type: jpg SAM_0137.JPG (857.7 KB, 427 views)
File Type: jpg SAM_0146.JPG (759.1 KB, 385 views)
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File Type: jpg SAM_0140.JPG (817.3 KB, 84 views)
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Old 2nd February 2012, 06:44 PM   #163
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Default MY A4 SIZE REBUILD.

Some more photos of my latest rebuild. The last but one is the old diaphragm, and the last photo is the new tape 2.25 mm wide to fit magnets on the rebuilt diaphragm using epsilon layout. I think it's called being obsessive.!! After this it's my planar headphones, to be finished. Then it's back to the rebuilds, all that tape cutting, about 300 meters.
Attached Images
File Type: jpg SAM_0154.JPG (777.7 KB, 81 views)
File Type: jpg SAM_0155.JPG (735.8 KB, 58 views)
File Type: jpg SAM_0157.JPG (729.6 KB, 56 views)
File Type: jpg SAM_0158.JPG (682.9 KB, 54 views)
File Type: jpg SAM_0159.JPG (779.1 KB, 40 views)
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File Type: jpg SAM_0162.JPG (680.5 KB, 44 views)
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File Type: jpg SAM_0164.JPG (526.4 KB, 49 views)
File Type: jpg SAM_0156.JPG (737.6 KB, 93 views)
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Last edited by JAMESBOS; 2nd February 2012 at 06:49 PM.
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Old 5th February 2012, 07:52 AM   #164
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Disaster, ruined the diaphragm got to do it again! So I am rebuilding another one instead 24 x 30 inches using 50 x 18 x 10 mm ferrites. Easier to build the diaphragm not so fiddly.Although I've got to cut another 45 meters in half again.
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Old 7th February 2012, 02:09 PM   #165
von Ah is offline von Ah  United States
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Default slant

I'm a total noob in planar theory. What's the rationale for non-parallel long sides (highlighted in the attachment) on your larger designs? This seems to be prevalent in a lot of planar speakers.
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File Type: jpg SAM_0147a.JPG (151.4 KB, 155 views)

Last edited by von Ah; 7th February 2012 at 02:11 PM.
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Old 7th February 2012, 03:07 PM   #166
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As FAR AS i KNOW IT'S TO DO WITH STANDING WAVES . i read in the first article and design over twenty years ago, so can't be of any more assistance on the matter, you will probably get better imfo from the experts!
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Old 9th February 2012, 09:19 PM   #167
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Quote:
Originally Posted by JAMESBOS View Post
Some more photos of my latest rebuild. The last but one is the old diaphragm, and the last photo is the new tape 2.25 mm wide to fit magnets on the rebuilt diaphragm using epsilon layout. I think it's called being obsessive.!! After this it's my planar headphones, to be finished. Then it's back to the rebuilds, all that tape cutting, about 300 meters.
Hi Henry
nice work!
What's the resistance of the small planars?
and, how does they sound? mine are a bit weak on bass... (size matters)

Regards
Pedro
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Old 9th February 2012, 10:27 PM   #168
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Quote:
Originally Posted by karellen View Post
Hi Henry
nice work!
What's the resistance of the small planars?
and, how does they sound? mine are a bit weak on bass... (size matters)

Regards
Pedro
I have stopped work on these at the moment as I ruined the diaphragm fitting it to the surround, and I have not heard it at this time. The resistance of the old diaphragm was 1.4 ohms, the new one is 4.4 ohms.
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Old 10th February 2012, 11:51 PM   #169
Few is offline Few  United States
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Does anyone know what technique Analysis uses to solder to their aluminum conductors? In some thread I haven't yet found again there was a discussion of techniques for breaking through the aluminum oxide layer while soldering but that approach doesn't seem applicable to very thin (5.5 micron) aluminum foil.
Few
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Old 11th February 2012, 04:54 AM   #170
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Few,is this the one you were looking for?

Soldering Aluminium

jer
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