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In Reply to: RE: How about when using the I2S "output" - posted by theob on June 29, 2010 at 05:07:04
Hi theob
Congratulation on the new improvement. Any diagram or photo to show your new implementation?
Follow Ups:
No diagram but I use 75 ohm teflon dielectric coax for each of the I2S lines. I combine the grounds of the coax @ juli@ then tie to one of the ground pins on Juli@. As Per Jack I float the ground ends of the coax at my Buf32s. Then I run a separate line from Juli@ ground to Buf32s ground. Thats it. Fairly simple but highly effective.
Key to using shielded coax is you can use longer I2S lines (mine are over 1.4 meters long). Those who use unshielded I2S lines are always emphatic to recommend very short lines to keep rfi at a minimum.
Thanks for the prompt reply. Yes, I understand the floating shield principle. Is your Buf32 an outboard DAC? How do you apply the 22ohm damping resistor?
Regards
The Twisted Pair Buffalo is a diy outboard dac using 8 ess sabre chips (4 a side in parrallel) to do the work. I soldered the 22 ohm resitors to the juli@ output pins then soldered my coax inner cable to the resistors.
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