Pure Clock here!
I have got the pictures!
Pure Clock,TCXO with only 1ppm tolerance.This will help to reduce jitter of CD-PRO2 module.
I have got the pictures!
Pure Clock,TCXO with only 1ppm tolerance.This will help to reduce jitter of CD-PRO2 module.
An externally hosted image should be here but it was not working when we last tested it.
I was looking through the manuals and the kit seems very well thought out and considering what's included, it's a real bargain (comparing for instance to what you are getting from Nico at not that much lower price).
If not for the fact that I already have 2 CD-Pro transports to play with (and recently bought ML31.5), I would be surely getting this one
If I have any suggestions for improvement, maybe a plate that covers the display board section when the door is open.
If not for the fact that I already have 2 CD-Pro transports to play with (and recently bought ML31.5), I would be surely getting this one
If I have any suggestions for improvement, maybe a plate that covers the display board section when the door is open.
a plate cover the CD-PRO2M module
I got the pictures from the website,the kit was assembled by Mr.Yang.
The plate was made by him,all DIY,looks fine!
But I won't do this in my CD transport.I like to see the words 'CD-PRO' when the door is open.I also like to see the mechanical structure inside,just like the traditional watch.
I got the pictures from the website,the kit was assembled by Mr.Yang.
The plate was made by him,all DIY,looks fine!
But I won't do this in my CD transport.I like to see the words 'CD-PRO' when the door is open.I also like to see the mechanical structure inside,just like the traditional watch.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
"covers the display board section when the door is open."
Ken: Thanks for the suggestion, Peter. We are thinking about making two of the support columns thinner, and put the board between the columns. But as of right now, the kit is provided with an acrylic cover to cover up the display board.
Regards,
Ken
Ken: Thanks for the suggestion, Peter. We are thinking about making two of the support columns thinner, and put the board between the columns. But as of right now, the kit is provided with an acrylic cover to cover up the display board.
Regards,
Ken
Re: REAL 1PPM?
I don't doubt 1ppm, but I do doubt that it helps the sound. 1ppm is a specification for satellites, not for CD players. 1ppm simply means that the clock will have the same mean frequency in 20 years as it does today, but it tells you nothing about the relationship of two consecutive clock edges (jitter, phase noise, etc). Similarly, temperature control helps stability at very low frequencies, but is pointless at audio frequencies.
The mechanical suspension of the clock is also suspicious. What's the resonant frequency?
YENFU said:
I don't doubt 1ppm, but I do doubt that it helps the sound. 1ppm is a specification for satellites, not for CD players. 1ppm simply means that the clock will have the same mean frequency in 20 years as it does today, but it tells you nothing about the relationship of two consecutive clock edges (jitter, phase noise, etc). Similarly, temperature control helps stability at very low frequencies, but is pointless at audio frequencies.
The mechanical suspension of the clock is also suspicious. What's the resonant frequency?
Would someone please explain why the firmware for a fully loaded CD Player is so b****y difficult?! I'm onto Shuffle mode after completing typing in track numbers from a remote and next is rollover remote commands (volume / fast forward)...
Coulomb:
Also at the risk of embarrassing myself, I would guess not since I don't think Optoisolators can run at 16MHz...But that is just a guess. I was on a website for a clock (Can't remember which) yesterday, and the clock signal was said to be very impressive, yet it had ringing all over it. Presumably these clock designers are battling to find fast enough components. Elso / Guido?
Coulomb:
Also at the risk of embarrassing myself, I would guess not since I don't think Optoisolators can run at 16MHz...But that is just a guess. I was on a website for a clock (Can't remember which) yesterday, and the clock signal was said to be very impressive, yet it had ringing all over it. Presumably these clock designers are battling to find fast enough components. Elso / Guido?
damping
I think no one have the ability to control everything which will hurt the sound quality.Using the Pure Clock only help us to get a better clock than BEFORE.
We still have a lot things to do.But we do try to improve the factor.(In fact.I do not install the pure clock in my CD-PRO2 transport now.)
The suspension column could fill in some damping material,such as oil.The resonat frequency will depend on the damping ratio.For me,this will be an interesting game.....IT'S DIY!
I think no one have the ability to control everything which will hurt the sound quality.Using the Pure Clock only help us to get a better clock than BEFORE.
We still have a lot things to do.But we do try to improve the factor.(In fact.I do not install the pure clock in my CD-PRO2 transport now.)
The suspension column could fill in some damping material,such as oil.The resonat frequency will depend on the damping ratio.For me,this will be an interesting game.....IT'S DIY!
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