Yes this is now my plan. Thanks for the advice. While taking a ribbon rest I'm attending to the rest if my OB to be top section 🙂
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One do now play. Not really satisfied with how it came together - one magnet is not perfectly aligned for instance. The ribbons where to wide so I went at it with the scissors - now I just wanted it to play really.
What is mostly needed is a assembly jig that makes it possible to replicate high precision builds.
Now for some measurements 🙂
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What is mostly needed is a assembly jig that makes it possible to replicate high precision builds.
Now for some measurements 🙂
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Attachments
First trials have been really interesting and I can hear superb potential but there is distortion. The last ribbon was made thicker in the middle to compensate for the non constant field in the gap.
The .asc file (rename to .mp4) is a short clip of how the ribbon behaves when DC current was steadily increased, as it happened in real time. It clearly "worms" itself towards xmax and will surely cause distorsion. Now come the fun part in understanding why and mitigate it. I have a few clues.
Measurement of this riven is also attached. This was taken 20 cm and only at 80 dB.
The .asc file (rename to .mp4) is a short clip of how the ribbon behaves when DC current was steadily increased, as it happened in real time. It clearly "worms" itself towards xmax and will surely cause distorsion. Now come the fun part in understanding why and mitigate it. I have a few clues.
Measurement of this riven is also attached. This was taken 20 cm and only at 80 dB.
Attachments
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Thanks solhaga. Need to get the distorsion down... I did something to the ribbon this evening and by ear it seems like going in right direction. To late to measure now 🙂
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The percentages seen at witch position in the fr graph are we looking at? I discovered pretty late that i could move the cursor haha
Hmm I think it was at highest k3. But do compare with the one above - same conditions. NB y axis scale.
Still, the SPL looks good. No sign of any geometrical sources for any dips or humps.
That's probably due to that the motor is relatively thin. Downside of that is that the linear excursion is fairly little.
BTW, what do you mean by k3, 3 kHz?
That's probably due to that the motor is relatively thin. Downside of that is that the linear excursion is fairly little.
BTW, what do you mean by k3, 3 kHz?
Best glue I have used for Neo magnets is Casco "Strong" it's a slow hardening
2-component epoxi. It was earlier called "blue araldit".
2-component epoxi. It was earlier called "blue araldit".
Yepp on meta data!
Cursor included... need to check how!
You see this "k2, k3" being used now and again instead of 2nd 3rd.
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Cursor included... need to check how!
You see this "k2, k3" being used now and again instead of 2nd 3rd.
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OK, its in the save graph - thanks!
And there is the input field for the meat data 😉
I ment that the cursor where at where K3 was the highest.
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And there is the input field for the meat data 😉
I ment that the cursor where at where K3 was the highest.
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Great. I hadn't observed that the comment ended up on the capture.
About the 2nd HD at 3,74 kHz.
There's a corresponding peak in the SPL at double that frequency.
It could be a standing wave. Is something 46 mm in your construction?
About the 2nd HD at 3,74 kHz.
There's a corresponding peak in the SPL at double that frequency.
It could be a standing wave. Is something 46 mm in your construction?
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