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Old 9th February 2010, 10:58 AM   #601
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Quote:
Originally Posted by adamus View Post
quick question regarding the inductors (120uf) From farnell i can only find a choke with self resonant frequency of 10khz.

What do you say about???

could i jumper the choke, the RC filter remains.
No, you can not use choke for Jumper.
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Old 9th February 2010, 11:01 AM   #602
adamus is offline adamus  United Kingdom
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other way round, can i not use the choke by jumpering the choke space on the PCB.

Sorry quanghao - i think the language barrier is confusing us.

Cheers
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Old 9th February 2010, 11:04 AM   #603
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Quote:
Originally Posted by adamus View Post
other way round, can i not use the choke by jumpering the choke space on the PCB.

Sorry quanghao - i think the language barrier is confusing us.

Cheers
Ok! can you show me??? and what do you want ask me about the DAC-end??

thank you!
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Old 9th February 2010, 11:08 AM   #604
adamus is offline adamus  United Kingdom
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i cannot find a suitable choke, so what would be the effect of not using one (replacing it with wire).

Thats all i want to know really. OR could i use the chokes with 10khz self resonsant frequency.
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Old 9th February 2010, 11:16 AM   #605
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Quote:
Originally Posted by adamus View Post
i cannot find a suitable choke, so what would be the effect of not using one (replacing it with wire).

Thats all i want to know really. OR could i use the chokes with 10khz self resonsant frequency.
where do you want use choke?? I board dac at output , after R 200 Ohm
Or near TL431???
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Old 9th February 2010, 11:17 AM   #606
adamus is offline adamus  United Kingdom
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the choke after the 200r, i dont want to use it.
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Old 9th February 2010, 11:20 AM   #607
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See these other models :

Inductors, Chokes & Coils | Farnell United Kingdom

with higher self resonsance frequency
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Old 9th February 2010, 11:37 AM   #608
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I thought they my work, trouble is is 16 for delivery.... ouch!.

Edit - found some on Ebay.

Any Uk'ers in need drop me a pm.

Last edited by adamus; 9th February 2010 at 11:44 AM.
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Old 9th February 2010, 06:38 PM   #609
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Boards arrived a couple of days ago - look good.

Thanks.

Vernon
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Old 9th February 2010, 07:40 PM   #610
Ekkeri is offline Ekkeri  Finland
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Quote:
Originally Posted by adamus View Post
the choke after the 200r, i dont want to use it.
Is there even places in the PCB for those? I can see 120uH (L1&L2) in "The Original Circuit" but not in the pcb layout for this project?

EDIT: Ok, now I see.. This isn't the final version I guess.. And BOM doesn't have those either?
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