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Old 22nd December 2012, 06:09 AM   #171
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The new Crystek oscillators are the new industry standard low jitter clocks....many, many companies are using these on their digital input boards. I use them with great results. I have not played with any see SAWs. Of course, I want the SAWs to win....they are much cheaper!
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Old 22nd December 2012, 06:50 AM   #172
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Quote:
Originally Posted by Ric Schultz View Post
The new Crystek oscillators are the new industry standard low jitter clocks....many, many companies are using these on their digital input boards. I use them with great results. I have not played with any see SAWs. Of course, I want the SAWs to win....they are much cheaper!
I just hope my excitement isn't getting me into trouble. I haven't tried the Crystek and I have no doubt it is very good, and now I wish maybe I shouldn't have open my big mouth too soon? But we will find out for sure. The SAWs have not been considered for audio before, so it may yet surprise. They sure have surprised me, and I know they are good, but how good?

Is the Crystek available in 27MHz?

Cheers, Joe R.
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Old 22nd December 2012, 07:48 AM   #173
Coris is offline Coris  Norway
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Quote:
Originally Posted by Joe Rasmussen View Post

ATTENTION Coris:

Of the 100MHz Oscillators you tried on the Sabre DAC, was one of them a Crystek 957 as used by the Buffalo guys?
Yes, I have tried in 95 (stereo stage) the 100Mhz Crystek 957 used in Buffalo 3. I had not an 100Mhz SAW to compare, but I can say that ESS9018 sounds better with 125Mhz SAW oscillator than with an 125Mhz standard one.
Anyway, I do not want go back to 100Mhz. The DAC chip it sounds better with higher clock frequencies than 100Mhz. Honestly, I do not know why...
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Old 22nd December 2012, 07:57 AM   #174
Coris is offline Coris  Norway
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Quote:
Originally Posted by Ric Schultz View Post
The new Crystek oscillators are the new industry standard low jitter clocks....many, many companies are using these on their digital input boards. I use them with great results. I have not played with any see SAWs. Of course, I want the SAWs to win....they are much cheaper!
What about trying SAW? Why not? Waiting for you opinions after doing so...
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Old 22nd December 2012, 08:05 AM   #175
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Quote:
Originally Posted by Coris View Post
Yes, I have tried in 95 (stereo stage) the 100Mhz Crystek 957 used in Buffalo 3. I had not an 100Mhz SAW to compare, but I can say that ESS9018 sounds better with 125Mhz SAW oscillator than with an 125Mhz standard one.
Anyway, I do not want go back to 100Mhz. The DAC chip it sounds better with higher clock frequencies than 100Mhz. Honestly, I do not know why...
Thanks Coris.

Well, that is certainly interesting. I did not find much of a difference between the 100MHz SAW and the 125MHz SAW - but I did get a few glitchy noises with one Oppo 95 and that went away when I replaced it with 100MHz SAW, and still heard those SAW qualities shine through.

Are we on to something new here? I am grateful to Coris for trusting me to try the SAW - and I did not know at the time he had also used the Crystek 957.

I know my friend in Malaysia has the Buffalo, and he reads this thread (Hi David) and he is going to try the SAW in place of the Crystek. So we should arrive at a consensus of opinion.

For those here, the Epsom 100MHz SAW is available from Farnel/Element14 - and the part number is 1907482.

The Oz website is: XG-1000CA 50.00MHZ 100PPM CC - EPSON TOYOCOM - OSC, SAW, 50.00MHZ, 100PPM, 3 | element14 Australia

Yes, they are cheap. But Epson also make a more expensive range and when you compare the relevant specs, they are basically the same. I can only think that this has something to do with scale of production and that they have made a stack of them. They are not that hard to get.

Cheers, Joe R.

PS: It's important to have a Ferrite Bead right on to the SAW 3.3V input and I also put a 10-22uF Murata SMD after the bead. or you may get glitchy noises.
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Last edited by Joe Rasmussen; 22nd December 2012 at 08:10 AM.
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Old 22nd December 2012, 08:06 AM   #176
Coris is offline Coris  Norway
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Quote:
Originally Posted by Joe Rasmussen View Post
I just hope my excitement isn't getting me into trouble. I haven't tried the Crystek and I have no doubt it is very good, and now I wish maybe I shouldn't have open my big mouth too soon? But we will find out for sure. The SAWs have not been considered for audio before, so it may yet surprise. They sure have surprised me, and I know they are good, but how good?

Is the Crystek available in 27MHz?

Cheers, Joe R.

I have used the bran new 24,576Mhz Crystek oscillator (not in BDP95). Good results! They may produce 27Mhz too. But they have for sure 54Mhz, 108Mhz...
Based on your idea, I think I want experiment more with divided clocks (using higher frequencies oscillators) for the main processor in 105.

Last edited by Coris; 22nd December 2012 at 08:10 AM.
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Old 22nd December 2012, 08:12 AM   #177
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Quote:
Originally Posted by Coris View Post
I have used the bran new 24,576Mhz Crystek oscillator (not in BDP95). Good results! They may produce 27Mhz too. But they have for sure 54Mhz, 108Mhz...
Based on your idea, I think I want experiment more with divided clocks (using higher frequencies oscillators).
Yes, in the Oppo 105 we may consider using SAW on the DAC and Crystek on the Mainboard.

Cheers, Joe R.
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Old 22nd December 2012, 08:19 AM   #178
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Quote:
Originally Posted by Coris View Post
Based on your idea, I think I want experiment more with divided clocks (using higher frequencies oscillators) for the main processor in 105.
Here is what I am using with 50MHz SAW divided down to 25MHz in Oppo 95.
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File Type: gif To_Coris_2.gif (6.5 KB, 376 views)
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Last edited by Joe Rasmussen; 22nd December 2012 at 08:22 AM.
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Old 22nd December 2012, 09:53 AM   #179
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ATTENTION ALL:

I think this is good news. I disconnected power from the 7.1 Board as well as the ribbon from the Stereo Board - it means the 7.1 Board is only mechanically fitted to the player, then turned it on, and played a test CD and I am looking at a nice sine wave on the scope. So it seems we can remove it all together, work on the Stereo side and when finished, pop it back.

Cheers, Joe R.
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Old 22nd December 2012, 12:13 PM   #180
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I see the heatsink on the Mediatek chip, this is some kind of clip into hole arrangement? I think the 27MHz clock is obscured by the heatsink. I seem to recall Ric saying that.

What's the correct technique to remove it, push down and release and then when you return it, push it and it will lock?

No rush, so taking my time. Is the above method correct ?

Cheers, Joe R.
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