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Old 5th November 2013, 07:15 AM   #391
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Here is my first test of silk screen printing .
I use White plastic paint:
[IMG]Click the image to open in full size.[/IMG]

Bernt
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Old 10th November 2013, 09:26 AM   #392
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Her my latest tests of silk screen with plastic paint:
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
Plastic paint is remowed with thinner.
I have to test more paint.Acryl for art.

Bernt
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Old 10th November 2013, 10:45 AM   #393
solhaga is offline solhaga  Sweden
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It looks like a long road for you to get this right.
I really admire your stamina and determination!

Have you tried to fold and bake any of the new material yet?
It doesn't need to be a perfect circuit or even a complete membran to test if that part of the process works works.
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Old 13th November 2013, 08:18 PM   #394
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I have been using the oven.For diaphragms and frame:
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
I made the frame from to pieces of plexiglass 3x6x118mm.
Have to make one more and a magnetsystem.

Bernt
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Old 13th November 2013, 08:35 PM   #395
solhaga is offline solhaga  Sweden
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Bernt, you are a true genius!
To make the frame out of plexiglass is supersmart.

Folded and baked membrane looks really great too.
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Old 17th November 2013, 06:23 PM   #396
Baldin is offline Baldin  Denmark
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Bernt, that looks utterly briliant ...... wooow you are good.
Can't wait to se the freq and dist measurements ....
So cool
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Old 18th November 2013, 07:10 AM   #397
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Thank you for all the kind Words.
I have been painting my living room,plastic paint,and have not had the time to Work with the AMT.
I have been fidling with the one I made,and it crackles a bit.Much more than the others I build.
Measurements and listning will show if it sounds distorted.

Bernt
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Old 22nd November 2013, 04:39 PM   #398
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I have tested this one:
[IMG]Click the image to open in full size.[/IMG]
Measures like this:
[IMG]Click the image to open in full size.[/IMG]

Bernt
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Old 22nd November 2013, 05:54 PM   #399
tyu is offline tyu  United States
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Vary cool...... thanks for posting the pic.......an info
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Old 26th November 2013, 08:40 AM   #400
Baldin is offline Baldin  Denmark
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Hi Bernt
Well you are getting something like 0.3 - 0.5 %THD, which is ok but not excellent.
At what sound preasure level 1m are you measuring?
From the graph it seems that you are not band limiting the input signal .... I was thining whather the crackling noise somes from the pleats touching eachother making for shorts between neighboring voice coil lines .... could it be this?
Maybe bandlimiting the signal from say 500 Hz, might help, and also keeping track on how high volumen you are playing.
Does it also crackle with a filter and music?

Anyway they look stunning.

..... one more ? ..... have you tried a magnet system like the one e.g. Mundorf is using .... essentially two iron plates, with open slots, and some neo magnets between ..... would think them much more efficient
BR Baldin
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