Full range planar speaker using neo magnets - Page 23 - diyAudio
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Old 18th October 2012, 08:54 AM   #221
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Default MORE NEO REBUILDS.

more!!
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Old 18th October 2012, 08:59 AM   #222
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Default and more

I no longer use the epsilon layout too much work for little return.
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Old 18th October 2012, 09:03 AM   #223
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Default and more

ditto
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Old 8th November 2012, 04:01 PM   #224
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Default thickness of mylar

I was looking at regular mylar and the metalized mylar.

The thinnest is 0.9 - 1 mil which converts to 24 micrometers (microns).

Maybe I missed it, but how thick is the mylar itself?

Earlier in the thread Henry was talking about 12uM , which I assumed was referring to the thickness of the aluminum tape.

Anyone have ideas on mylar/aluminum coating thickness? I was thinking you'd have to take in account the thickness of both layers, if going the metalized mylar route.

Sincerely,

David P.

Edit: Was reading http://www.magnetostatic.com and he said the thickness of both aluminum and mylar was 12uM which together is 24uM which does equal 1 mil thickness. So I guess the assumption could be made that 1mil (24uM) thick metalized mylar is 12uM/12uM mylar/aluminum.

Last edited by EternaLightWith; 8th November 2012 at 04:07 PM. Reason: opps it's henry not james
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Old 5th January 2013, 10:24 AM   #225
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Default Upgrade of covers and repair caused by old age and senility

Replacement of ruined diaphragm and new covers for hanging full range planars.:-
Attached Images
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File Type: jpg SAM_0504.JPG (328.3 KB, 41 views)
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Old 5th January 2013, 10:29 AM   #226
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Default THE NEW COVERS

The new cover ready to be hung after repair. 2 more to do but problem with the one over the door size wise. Not made my mind up yet what to do!!
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File Type: jpg SAM_0505.JPG (369.4 KB, 53 views)
File Type: jpg SAM_0506.JPG (363.7 KB, 58 views)
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Old 5th January 2013, 10:38 AM   #227
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The original covers of differing shades of blue, will make good dust covers!. The canvas pictures are more in line for married men! You could give her the choice of picture, this will help if you have problems with your better half. The pink dhalias look nice.!!
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Old 5th January 2013, 10:46 AM   #228
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Default DE-CLUTTERING.

Will be removing large ferrite uncovered ones, less clutter so I can do more measuring, when I have sorted out software to do so! Any tips would be appreciated.
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Old 5th January 2013, 10:54 AM   #229
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The actual canvas covered speakers sound better, not so harsh, which seem to be a trait of the neo magnets I have found. Or it may have something to do with the size, although I have built larger neo ones, which still sounded harsher than the larger ferrites. The ferrites do sound more mellow and not as strident!?
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Old 5th January 2013, 11:06 AM   #230
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There is probably a rising response if the diaphragm is really lightweight.

I think that Room EQ Wizard has it covered for frequency response graphs, and is free and unrestricted. I use the demo of ARTA to check distortion.

Do you already have a mic?
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