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Old 25th February 2010, 08:39 PM   #1
diyAudio Member
Join Date: Nov 2009
Location: Lincolnshire UK
Default I would like to try this...

I come across this and would like to have a go....

PCM2706 High Fidelity USB Soundcard / USB Headphones

I was going to have a go using a schmartboard. My problem is, I cant find any reference to L1 or X1. Can anybody help with the componants.

I got the 2706 on order.
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Old 25th February 2010, 09:07 PM   #2
Join Date: Jan 2008
Blog Entries: 2
X1 is the 12MHz crystal resonator. I suspect pretty much any 12 MHz crystal with an appropriate load capacitance (often 2 x 20pf for integral oscillators, they're mostly Colpitts with a parallel xtal), which you'll find in the PCM 2706 datasheet. There are several references in the example circuits in the datasheets. I haven't read the datasheet in detail but there will be further references to the exact components if these are manufacturer- or type-critical. I don't see L1 immediately, but I suspect you haven't read the datasheet, and I'm not the one building this thing.

Looks fun, have fun,


Last edited by wakibaki; 25th February 2010 at 09:18 PM.
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Old 27th February 2010, 09:05 PM   #3
riktw is offline riktw  Netherlands
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Join Date: Sep 2007
that thing works fine to without L1.
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Old 28th February 2010, 12:33 AM   #4
diyAudio Member
Join Date: Nov 2009
Location: Lincolnshire UK
nice1 thanks.. chips will be here mid march
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