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Old 12th October 2007, 12:22 PM   #7961
RCruz is offline RCruz  Switzerland
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Quote:
Originally posted by RCruz


Can not identify U210 and not sure about U214.... can you place me in the schematics ?

Regards
Hi

I found the U210 and U214-

Should I remove all the resistors in the output R657 658 659 620 ?

Can I bypass everything and pull a wire (screened) from U210 214 directly to the output ???



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Old 12th October 2007, 12:40 PM   #7962
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I would have thought R651 652 653 654 are already removed on yours as these supply the HDAM which you dont have.So dont worry about them.

Yes you bypass it all from the Uxxx to the output sockets

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Old 12th October 2007, 12:42 PM   #7963
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Oh R657 658 659 660

I would leave them in to be honest. I have found no gains or losses leaving or removing them

Brent
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Old 12th October 2007, 03:17 PM   #7964
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Default Jitter measurement

Quote:
Originally posted by SimontY
Excellent Ray, will there be measurements of a standard and/or modded CD63/7?

Simon
As promised: here's a jitter measurement on the clock signal of a standard CD57. In this post the histogram was given for The Flea mounted in an ezDAC.

Regards,

Ray
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File Type: jpg cd57_16.9_hist.jpg (85.1 KB, 233 views)
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Old 12th October 2007, 03:18 PM   #7965
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Default Jitter measurement

For easy comparison: here's the previous one again:
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File Type: jpg flea_24.5_hist.jpg (87.0 KB, 230 views)
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Old 12th October 2007, 03:22 PM   #7966
6h5c is offline 6h5c  Netherlands
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It's easy to see the histogram is much worse for the first one, even with the horizontal scale being twice as big (1ns vs. 500ps). If it would be equal, the first one would be twice as wide .
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Old 12th October 2007, 03:26 PM   #7967
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Excellent work Ray, it's very clear to see the signal is much tighter on the aftermarket clock.

Simon
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Old 12th October 2007, 03:31 PM   #7968
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by SimontY
Excellent work Ray, it's very clear to see the signal is much tighter on the aftermarket clock.

Simon
Thanks Simon. At least this is some hard proof considering the clock signal. A whole different story is to translate how this may affect the sound. I remember reading a piece on TNT where they deliberately injected jitter into a CD67.

Ray
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Old 12th October 2007, 03:37 PM   #7969
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Yes, they said it made it sound nice and warm!
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Old 12th October 2007, 03:41 PM   #7970
avr300 is offline avr300  Denmark
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The interesting numbers here (beside the graphics) must be std. dev. 19 / 67.
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