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Multi-Way Conventional loudspeakers with crossovers

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Old 15th January 2017, 03:38 PM   #521
ente is offline ente  Germany
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Default ARTA DIY-Turntable

... here you will find some more information about the turntable:

https://www.youtube.com/watch?v=FWQudBXWUZs

Regards
Heinrich
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Old 15th January 2017, 08:50 PM   #522
Omholt is offline Omholt  Norway
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Quote:
Originally Posted by ergo View Post
Seems that the PCB+controller is for sale here for 99EUR
ARTA Turntable
and the other items are also reasonable price - so would make a nice DIY project.
I have tried to contact him, but haven't received any reply. I'm interested in buying.
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Old 15th January 2017, 09:56 PM   #523
ente is offline ente  Germany
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Hi Bjorn,

I will inform Ralf about your attempt to contact him.

Here is some additional Information about the making of the DIY-Turntable:



Regards
Heinrich
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Old 23rd January 2017, 07:05 PM   #524
GerardMan is offline GerardMan
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My turntable version for ARTA is a 3D design to see when I can do it.

An externally hosted image should be here but it is no longer accessible. Please upload images instead of linking to them to prevent this.
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Old 31st January 2017, 07:50 AM   #525
Omholt is offline Omholt  Norway
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ARTA
How can I change the db scale on the Y-axis to higher resolution for the polar plot? In this example, -6 dB ends up being out of bounds.
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Old 31st January 2017, 09:46 AM   #526
iMat is offline iMat  Croatia
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Quote:
Originally Posted by Omholt View Post
How can I change the db scale on the Y-axis to higher resolution for the polar plot? In this example, -6 dB ends up being out of bounds.
Hi,
the smallest range is 5dB which gives (color) resolution step of 0.5dB. You can adjust it with control "Range".
Allowing smaller range than this is not good as interpolation algorithm, and measurement itself, introduce some errors.

Best,
Ivo
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Old 31st January 2017, 09:53 AM   #527
Omholt is offline Omholt  Norway
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Originally Posted by iMat View Post
Hi,
the smallest range is 5dB which gives (color) resolution step of 0.5dB. You can adjust it with control "Range".
Allowing smaller range than this is not good as interpolation algorithm, and measurement itself, introduce some errors.

Best,
Ivo
If I minimize the range, I don't get to see out to -6dB. So that doesn't help me much.

Is there no way to change to angle on y-axis only?
I would like to show it in similar way like this one where it's been used 80.
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Old 31st January 2017, 04:52 PM   #528
iMat is offline iMat  Croatia
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Quote:
Originally Posted by Omholt View Post
If I minimize the range, I don't get to see out to -6dB. So that doesn't help me much.

Is there no way to change to angle on y-axis only?
I would like to show it in similar way like this one where it's been used 80.
Sorry,
I did not understood your question.
-6dB is meaningfull if you normalize responses.
Please make directivity plot again and normalize with response at zero angle.
Ivo
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Old 31st January 2017, 05:41 PM   #529
Omholt is offline Omholt  Norway
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Quote:
Originally Posted by iMat View Post
Sorry,
I did not understood your question.
-6dB is meaningfull if you normalize responses.
Please make directivity plot again and normalize with response at zero angle.
Ivo
Is it possible to change the angle on the y-axis? For this spesific measurement it's automatically using 40 degrees. I want to change it to 80 degrees.

You can see the setup I've used below and the result. It's not showing me enough. -6dB is outside the graph. If I reduce it to 10 db range, it's only showing till -4 dB.
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File Type: jpg arta setup polar.jpg (135.4 KB, 247 views)
File Type: jpg directivity.jpg (771.9 KB, 247 views)
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Old 31st January 2017, 06:55 PM   #530
iMat is offline iMat  Croatia
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The angle range is determined by input data, i.e. name of files contain angle, and that input range can't be changed later.
Ivo
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