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Old 27th August 2008, 04:30 PM   #11
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see the comments below:


http://www.tubecad.com/2006/06/blog0070.htm



regards,
Joo
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Old 27th August 2008, 05:54 PM   #12
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What about jitter?
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Old 28th August 2008, 06:43 AM   #13
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Quote:
AND, don't forget about having a decent clock!
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Old 29th August 2008, 03:18 PM   #14
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Which clock; TentLabs, Elso Kwak, LCaudio? Any else?
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Old 30th August 2008, 06:54 AM   #15
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I'm not sure choice of clock is that crucial.
I think its more important that the clock's power supply is very quiet.
I use my own variation of what some call the Kwak Clock, and it works well.
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Old 30th August 2008, 07:17 AM   #16
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Quote:
Originally posted by philpoole
I'm not sure choice of clock is that crucial.
I think its more important that the clock's power supply is very quiet.
I use my own variation of what some call the Kwak Clock, and it works well.

Hi philpoole, you care to post your version?
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Old 30th August 2008, 12:26 PM   #17
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Well, its not wildly different.
Essentially its single supply, with a fairly standard regulator and large decoupling capacitors. Nothing special. I thought I'd try it to save space and see if would sound different. I have the bits to have another one, so I can do some much better regulation, and return to dual supply.

The Colpitt's oscillator and comparator circuit are essentially the same.
I have toyed with using one without a comparator - as long as the output is large enough, as it should possible to clock using a sine wave, and then you could avoid any phase errors caused by the comparator switching. Not sure if would yield any benefits.
Which sort of leads me to the point I think I've found. These ideas have never come into fruition as I believe what I have is almost good enough (although I think the regulation could be improved).

Using a seperate clock module is very important, but I think they all do the job relatively well.
I know I sound undecided, but as I already have a clock, I'm more interested in my digital filter setup, as I think improving that will provide more improvement.
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Old 26th October 2008, 06:47 PM   #18
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bump for a very interesting conversation.
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Old 27th October 2008, 04:17 PM   #19
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Quote:
Originally posted by Telstar
bump for a very interesting conversation.

Regarding noise in clock supplies you may find this thread interesting:
http://www.diyhifi.org/forums/viewto...t=1570&start=0
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