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Old 24th January 2006, 09:17 PM   #11
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Here are some of my first measurements. Ribbon was driven with aktive 4th Order Linkwitz-Riley crossover at 1000 Hz for security reasons. Amplifier is current feedback type of own construction. Screenshots show step response and SPL, both measured with my soundcard without calibration. SPL is at 1 m on axis.
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Old 24th January 2006, 09:35 PM   #12
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Attachments seem to have been lost, here ist no 1:
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File Type: jpg rib2_step_2.jpg (28.4 KB, 1221 views)
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Old 24th January 2006, 09:35 PM   #13
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... and no 2:
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File Type: jpg rib2_spl.jpg (88.5 KB, 1264 views)
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Old 24th January 2006, 09:39 PM   #14
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Hi Michael,

They weren't lost, they hadn't cleared the queue yet. I have past one set and removed the other.
You are no longer under direct moderation so your posts and attachment will show up right away.

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Old 24th January 2006, 09:45 PM   #15
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hey micheal. Your website is empty on the link to your program. are you going to share it or use it comercially?

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Old 25th January 2006, 06:16 AM   #16
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Default Step Response Software

Hi Bas,

sorry, but the program isn't ready yet. I'll have to debug some of the features.
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Old 25th January 2006, 06:41 AM   #17
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That looks absolutely great.
Very good work.
How much did it cost to make?
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Old 25th January 2006, 07:50 AM   #18
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Default Costs

Hi Promitheus,
costs were around 40 Euros per driver for my smaller tweeters with a 12 x 200 mm ribbon including some 25 Euros for the neodym magnets. The bigger ribbon at 20 x 200 mm needs more magnetic power and will cost around 60 Euros.
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Old 25th January 2006, 08:03 AM   #19
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I see we have gotten a celebrity as a new member here !

Regards

Charles
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Old 25th January 2006, 08:23 AM   #20
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That´s not bad.
60 Euro for a large ribbon is cool.
What do commercial ribbons use as foil?
Alufoil isnt the toughest material, nut ok it works.
Is there something better maybe metalized foils like in capacitors.
They are very thin and dont brake easy.
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