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Old 20th November 2012, 10:36 AM   #61
JohnL is offline JohnL  United States
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Location: Tampa, FL
Just FYI:

Air Motion headphones by Precide.
ergo eng
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Old 21st November 2012, 01:52 PM   #62
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Quote:
Originally Posted by JohnL View Post
Just FYI:

Air Motion headphones by Precide.
ergo eng
Thanks for the link. I found another AMT headphone by TakeT (piezoelectric too). There's a good chance that I'll buy some Beyma diaphragms to experiment with.
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Old 21st November 2012, 05:39 PM   #63
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I tried to make a diaphragm with 50my mylar it didnot turn out well.
My next was with 25my sail repair mylar tape ,and her is the messurement:
[IMG]Click the image to open in full size.[/IMG]
Red is ESS, blue Diy I dont have calibrated messurements ,distortion messurements is not comparable.
It works fine from app 1500 Hz.
I have seen another alu mylar tape:http://simaintl.com/store/aluminum_mylar_PET_tape.html
I could maybe etche it like print cirkuit board.Sorry for my English.
I have made dravings in Google SketchUp:
[IMG]Click the image to open in full size.[/IMG
I can print on my alu/paper.Is it possibly to print on alu mylar?


Bernt

Last edited by båndsei; 21st November 2012 at 05:48 PM.
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Old 22nd November 2012, 06:51 AM   #64
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That's already pretty impressive. They have the same FR anomalies - all enclosure related then? (No EQ?)

Do want to etch the circuit like this guy did for planar magnetic headphones?
My DIY Planar Magnetic Headphones and Drivers

I wonder if it is enough to physically press a regular structure like the heatsink against the foil, to mask it. Like, put the foil in a container, press mask down on it, add the liquid, remove liquid, remove the mask.
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Old 22nd November 2012, 01:58 PM   #65
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A couple more ideas for the mask -

The pattern is simple so a stencil should be good enough - like drawing/painting through the slits in an air grill, or using your heatsinks like a stamp.

What do you think?
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Old 28th November 2012, 04:29 PM   #66
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iI have found a new tape app 12my mylar and 8my adhesive:Polyester Tape : 3M UK & Ireland
It is thermosetting rubber adhesive.
At wich temperature set´s it??
Mylar is the same as polyester and PET.

Bernt.
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Old 29th November 2012, 11:20 AM   #67
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Check out these thermal foil heaters

http://www.omega.com/Heaters/pdf/KH-KIT.pdf

Some of these etched kapton heating elements have some pretty nice looking traces for audio use.
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Old 29th November 2012, 12:15 PM   #68
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Bernt,

maybe I missed this, but how do you get the electrical contact to the aluminum trace? Soldering aluminum is difficult enough, but on a mylar substrate, this would be a no-no.

Also, why are you trying to make the diaphraghm from scratch when you can buy from PE?
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Old 2nd December 2012, 03:43 PM   #69
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Capslock,here is a picture that shows it:
[IMG]Click the image to open in full size.[/IMG]
I press a copper U to make kontact.
I have tried the new tape,on 2 diaphragms,one sized as ESS and one 20% larger:
[IMG]Click the image to open in full size.[/IMG]
Green is the large one.
Messurements are not calibrated,distorsion cant be compared.
I have a diaphragm from PE ,its the great Heil from ESS.I would like it to play deeper.

Bernt.
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Old 3rd December 2012, 08:09 AM   #70
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Impressive progress. So both those FRs are home made? Are those horizontal bits of tape conductors or for rigidity?
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