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Old 4th November 2006, 01:02 AM   #211
Bearman is offline Bearman  United States
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I'll go for two Brian.
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Old 4th November 2006, 01:38 PM   #212
VT67 is offline VT67  Belgium
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I received an email yesterday evening from TI that my two TAS5261 samples are shipped
So my guess is they will be delivered to me monday morning.

Brian, I will send you a PM on the parts matter.

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Old 4th November 2006, 01:50 PM   #213
BWRX is offline BWRX  United States
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Sounds good. I'm working on a wiki page right now to help me stay organized and to allow people to edit the quantities of what they want in the table. I'll post a link to it when it's done.
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Old 4th November 2006, 02:26 PM   #214
BWRX is offline BWRX  United States
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Here's the wiki page: http://www.diyaudio.com/wiki/index.p...ards+and+parts

Let me know if any more information/explanation is needed. All quantities are preliminary as I have just filled in names and quantities for those interested. Please change them as you see necessary.
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Old 4th November 2006, 06:17 PM   #215
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Nice, you could put there BOM xls file. One question about T106 core: while looking for it I found out that you still have to give more details - there are at least two different versions. One is made of material #2 (whatever that means), and the other of material #3. The first one has AL=13,5 uH/m2 and the other =45 uH/m2. Which one is the correct one?

Marek
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Old 4th November 2006, 07:22 PM   #216
BWRX is offline BWRX  United States
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You can find the MPP T106 cores listed here: http://www.cwsbytemark.com/prices/mpp.php

The ones I will order are part number CM270060. They're made of molypermalloy (MPP) with a permeability of 60.

Here's a link to the technical data for the T106 cores: http://www.cwsbytemark.com/CatalogSh...20files/40.pdf
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Old 4th November 2006, 10:47 PM   #217
BWRX is offline BWRX  United States
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It takes 2.5 feet of 18ga wire to get 18 turns on the T106 cores (with some air gap between windings). The finished inductor should look something like the attached photo. I'm changing the wire gauge from 16 to 18 because 18 is hard enough to wind and shouldn't make much difference over 16ga.

I believe Thomas had measured the inductance of his T106 MPP cores (permeability of 60) to be about 11uH with 13 turns of 16ga wire. It shouldn't be much different with 18ga wire.
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Old 4th November 2006, 11:27 PM   #218
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Cool, count me in. Even I can make coils like that ...

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Old 4th November 2006, 11:56 PM   #219
BWRX is offline BWRX  United States
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Yep, 13 turns on those cores isn't hard to do. It is hard to keep the 16 and 18 ga wire flat to all sides of the core. At least you'll have a hard time breaking either the core or the wire if you pull really hard.

I also tried winding a core with 3 0.7mm diameter wires side by side. This tried my patience a little but it can be done and looks pretty cool. Don't know if it would sound any better than the single 18ga wire or not but the windings are much closer to the core all the way around.
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Old 6th November 2006, 07:56 PM   #220
VT67 is offline VT67  Belgium
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As predicted, the two TAS5261 chips arrived today
Muchos gracias TI.

Regards
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