Clocks

[hacknet]

i`ve wanted to modify my cdplayer recently and have been advised to change the onboard 11mhz clock to a lower PPM one. how do i identify a lower ppm one? is there anything on the clock body that i can make assumtions from?

Thanks!

[Jocko Homo]

It has to do with lower jitter, and the design criteria for the two are different.

Several guys have kits or similar stuff that you can buy, including just PCBs.

Jocko

[peranders]

If you want to replace the oscillator there are two products on the market.

Tentlabs www.tentlabs.com

and LCAudio
http://www.lcaudio.dk/com/index.php?...8f4bca00c416fe


Which is the best? We have had and long long thread about this but we couldn't come to any conclusion. LCAudio's look coolest with 4-layer pcb and a blue LED!

[Elso Kwak]

Hi Hacknet,
Well there is also the Audiocom clock, the Trichord clock, the Netaudio clock, the clocks from www.audiotuning.de , the Gruensch clock www.gruensch.de , the French Maxi clock by Antileon http://www.tnt-audio.com/clinica/antileon_e.html , the G & D Transforms clock I never did get hold of, the K.K. Ho clock from Hong-Kong, Jocko's DIY clock as posted on this forum and the DIY KWAK-CLOCK. You can download the schematic here:
http://www.diyaudio.com/forums/showt...928#post199928

[hacknet]

thanks. is there any other way instead of building these circuits?

[Elso Kwak]

Originally posted by hacknet
thanks. is there any other way instead of building these circuits?

Except the latter two all other clocks are ready built. This is a DIY forum.

[hacknet]

I was hoping for drop in replacements... eg, a lower ppm clock that i could just use to replace the original one.

[Elso Kwak]

Originally posted by hacknet
I was hoping for drop in replacements... eg, a lower ppm clock that i could just use to replace the original one.

Hi Hacknet,
I am sorry but I am afraid you confuse the crystal with the clock.
A clock is a crystal oscillator consisting of a crystal, a active circuit with a transistor or FET and very often a low noise power supply regulator.
I know of the AhTjoeb offering a low jitter crystal whatever that may be. As Jocko said low ppm does not say anything; low jitter, low frequency deviation......? In my experience the active circuit is much more important than the crystal. Also a SC-cut crystal that seems to be the best for low jitter is VERY expensive, something like US$ 120.

[hacknet]

oh... okay... now i understand... i think i`ll go ahead with the kwak 7. thanks!

[Guido Tent]

Originally posted by Elso Kwak

Except the latter two all other clocks are ready built. This is a DIY forum.

Hi

The heart of the TentLabs clocks is available for DIY as well

cheers