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Old 13th December 2008, 06:25 PM   #1
Baldin is offline Baldin  Denmark
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Default DIY ref clock for DVD/CD

Hi All. New to these parts of diyaudio.com

Anyway, it might already be her somewhere but I can't really find it.

Has anyone done a good upgrade clock for use in DVD or CD??

I'm going to do some moding of my otherwise perfect Denon DVD 3910.
I actually like the sound very much, but I guess I can get a little more out of it by modification.

I'm not going to spend a lot of money on this project, as I guess the money would be better spent on a new and better DVD.

Therefore I'm not prepared to spent 150 Euro or more on a new clock from Tent, DEXA or other quite expensive alternatives.

Has anyone done something similar, using more standardised components with good results???

Bessides a better clock I'm considering changing the op amps in the I/V and buffer stage.
As I said I think it is already a solid construction and I'm not expecting to get a night to day experience in sound improvements.

Thanks in advance and kind regards Baldin
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Old 15th December 2008, 03:29 PM   #2
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Hi, What' s the frequency you need?
Some have built the KWAK-CLOCK for DVD with good results.
http://www.diyaudio.com/forums/showt...928#post199928
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Old 17th December 2008, 04:04 PM   #3
Baldin is offline Baldin  Denmark
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Thanks that's what I was serging for.

I wonder how this clock 7 would perform and sound to more established solutions from LC Audio, Tent Labs etc.


Has anyone tried it out in a A/B setup with on of the other solutions???

It's quite a lot cheaper solution, but will probably be an improvement to the clock in my Denon DVD
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Old 17th December 2008, 06:08 PM   #4
Baldin is offline Baldin  Denmark
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Just read a bit about TI's CDCE913. Seems like an alternative to the Kwak .... anyone tried this or has any comments?

http://focus.ti.com.cn/cn/lit/an/scaa088/scaa088.pdf

http://focus.ti.com/lit/ds/scas849b/scas849b.pdf
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Old 17th December 2008, 07:50 PM   #5
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Quote:
Originally posted by Baldin
Just read a bit about TI's CDCE913. Seems like an alternative to the Kwak .... anyone tried this or has any comments?

http://focus.ti.com.cn/cn/lit/an/scaa088/scaa088.pdf

http://focus.ti.com/lit/ds/scas849b/scas849b.pdf

you did not notice the red phase noise spikes?
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Old 17th December 2008, 08:13 PM   #6
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Quote:
Originally posted by Baldin
Just read a bit about TI's CDCE913. Seems like an alternative to the Kwak .... anyone tried this or has any comments?

http://focus.ti.com.cn/cn/lit/an/scaa088/scaa088.pdf

http://focus.ti.com/lit/ds/scas849b/scas849b.pdf
Elso Kwak's clock is a well regarded DIY clock that has been around for quite awhile. Also, he still sell kits at reasonable prices. I believe you can contact him at elsokwak at home.nl

Regards,
Dan
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Old 17th December 2008, 08:17 PM   #7
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Smile No spam please

Dan please remove the @
to avoid spam
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Old 18th December 2008, 06:07 PM   #8
Baldin is offline Baldin  Denmark
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Hmmm you might be correct. I don't think it is that obvious what the graphs are showing.
I asumed that the green curve was the output and the red the "input". In the text relatively low jitter walues are mentioned both in RMS and p-p values
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Old 21st December 2008, 02:13 PM   #9
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Quote:
Originally posted by Baldin
Just read a bit about TI's CDCE913. Seems like an alternative to the Kwak .... anyone tried this or has any comments?

http://focus.ti.com.cn/cn/lit/an/scaa088/scaa088.pdf

http://focus.ti.com/lit/ds/scas849b/scas849b.pdf

avoid synthesizers if you want to build serious clocks

above all, for a CDP / DVD you "just" need a good master clock

best
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Old 21st December 2008, 03:03 PM   #10
Baldin is offline Baldin  Denmark
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Ok. I think I'll try the Kwak Clock 7.

It should be pretty easy to convert it tosingle +5 VDC.
Also thinking og using a shunt or actually two on for the oscillator and one for the comparator.
I'll use the crystl that is already in the DVD, and a MAX913 or a LT1016 as I already got one these.
Will try to get the J309 ... but might have to substitude .... any ideas of a more common type that will do?

Cheers Baldin
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