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I’ve retested and I got about the same results. Also tested a pair of SR-007 mk2 and then I got graphs more like your Orpheus Clone and 007mk1.

I’m very satisfied with the bass, well not as good as 009S but good for my DIY headphone. I’ve tried different diaphragms and some of them are terrible, but I actually manage to do some better. Another thing is that my home made phones are not as sensitive as Stax and the diaphragms need time to charge. They start soft and after half an hour or so the sound reach it’s max.

Here is how I stretch the Mylar film. 12 inch inner tube and Scotch Magic tape.
IMG_0335.thumb.JPG.7f6bebe1ed88ffce61bfbcde9fb42080.JPG
 

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Incredible ! 

Everything look easy in your kitchen...

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5 hours ago, JoaMat said:

I’ve retested and I got about the same results. Also tested a pair of SR-007 mk2 and then I got graphs more like your Orpheus Clone and 007mk1.

I’m very satisfied with the bass, well not as good as 009S but good for my DIY headphone. I’ve tried different diaphragms and some of them are terrible, but I actually manage to do some better. Another thing is that my home made phones are not as sensitive as Stax and the diaphragms need time to charge. They start soft and after half an hour or so the sound reach it’s max.

Here is how I stretch the Mylar film. 12 inch inner tube and Scotch Magic tape.
IMG_0335.thumb.JPG.7f6bebe1ed88ffce61bfbcde9fb42080.JPG
 

I think you've stretched the diaphragms too much.  :)

 

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Thanks for feedback.

Those diaphragms in the picture were much more stretched then the previous I‘ve made. Seems I’ve to keep on trying to make diaphragms with the right tension.

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Got sick of cords all over the place.107DE4DE-F5D8-44E0-99C0-B2CCAC52CBE1.thumb.jpeg.e8514b2ddf6758a499d5b6a218c47123.jpeg232C6398-9892-4E37-8617-97B7B35E9CAB.thumb.jpeg.eb808dbcf534ace2929d5cb481802da0.jpegAE33277E-3694-42BE-8DB2-3CAB94B32350.thumb.jpeg.247707a81898fa7163c1e504b0d614ac.jpeg

DIY'ed a charging drawer using a cheap conference room table fixture from Amazon. Much cheaper than the commercial products that run around the $300 mark. 

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I finally cased up my uTracer.  So much nicer to work with :)

20190630_231750401_iOS.thumb.jpg.210a46ecfe8e12810a8933d4483dc0c1.jpg20190630_231756705_iOS.thumb.jpg.41e20ce1ed6912c12876c633b1940ccd.jpg20190630_232208182_iOS.thumb.jpg.cf2cbbcd3d92fff90d3260ad775b07d5.jpg20190630_232222660_iOS.thumb.jpg.564a8222cba0f2b72332a6444e995ca4.jpg20190701_002944659_iOS.thumb.jpg.42d4743fb28ec8267515a4ac4761b316.jpg20190701_023304851_iOS.thumb.jpg.d44ff164f41bf97f98d57879273e1875.jpgEL34-PlateCharacteristics.thumb.GIF.e23838e974781c60287ded680b2c9ec9.GIF

 

I still have a few refinements, but it's up and running now.

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Nice!

Have been thinking about the selector for a while… now I think I know its purpose.

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My u Tracer.   IMG_2451.thumb.JPG.ead651d435303500a1c378d04f04c554.JPGIMG_2442.thumb.JPG.80e6709038005da4aa3433e84629c51f.JPG

Edited by Inu
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