Who makes the best crystals ?

percy · 7th March 2006, 12:30 AM

I am searching for a good crystal to replace in the sound card. Right now its a Hooray (HEC?) 24.576Mhz. Is it good ?

Almost all that I looked at Mouser/Digikey have a tolerance/stability of +/-50ppm. What other better options do I have ?

b-square · 7th March 2006, 12:32 AM

Quote:

Originally posted by percy
I am searching for a good crystal to replace in the sound card. Right now its a Hooray (HEC?) 24.576Mhz. Is it good ?

Almost all that I looked at Mouser/Digikey have a tolerance/stability of +/-50ppm. What other better options do I have ?

Tent XO.

http://www.tentlabs.com/

davidsrsb · 7th March 2006, 02:33 AM

Is this a crystal or a module?
If it's just a crystal the accuracy will depend on the capacitors and the oscillator circuit

Bare · 7th March 2006, 03:11 AM

StarFleet ... Doh!
Only the V best will do for your Soundcard

Elso Kwak · 7th March 2006, 07:06 AM

Quote:

Originally posted by b-square

Tent XO.

http://www.tentlabs.com/

That is NOT a crystal!
It is a complete crystal oscillator!

Elso Kwak · 7th March 2006, 07:08 AM

Quote:

Originally posted by percy
I am searching for a good crystal to replace in the sound card. Right now its a Hooray (HEC?) 24.576Mhz. Is it good ?

Almost all that I looked at Mouser/Digikey have a tolerance/stability of +/-50ppm. What other better options do I have ?

Ordinary crystals are AT cut . You can try other cuts like SC, very expensive, but the circuit of the oscillator is more important.

I bet the ppm thingy you cannot hear.

b-square · 7th March 2006, 03:25 PM

Quote:

Originally posted by Elso Kwak

That is NOT a crystal!
It is a complete crystal oscillator!

thank you for your input.

EC8010 · 7th March 2006, 03:43 PM

The long-term frequency tolerance is neither here nor there. Would you be able to hear if the music came out 0.005% slow or fast? What is important is the short term variation in frequency known as jitter. Jitter is mostly determined by the circuit around the crystal. Sound cards and CD players typically use appalling circuits which is why Elso Kwak's and Guido Tent's clocks are so popular.

Petter · 8th March 2006, 07:31 PM

In my experience (and I have not tried Guido's stuff!), Valpey Fisher makes killer oscillator modules. Vectron is also supposed to make really good stuff, but they are impossible to communicate with.

Phase jitter is what you want to minimize. In the end, the net result is a function of product and implementation.

Petter

Elso Kwak · 8th March 2006, 07:36 PM

Quote:

Originally posted by Petter
In my experience (and I have not tried Guido's stuff!), Valpey Fisher makes killer oscillator modules. Vectron is also supposed to make really good stuff, but they are impossible to communicate with.

Phase jitter is what you want to minimize. In the end, the net result is a function of product and implementation.

Petter

Try to order a few in CD-frequencies like 11.2896 MHz or 16.9344MHz. I will take a few of the former

7th March 2006, 12:30 AM	#1
percy diyAudio Member Join Date: Apr 2004 Location: MN	Who makes the best crystals ? I am searching for a good crystal to replace in the sound card. Right now its a Hooray (HEC?) 24.576Mhz. Is it good ? Almost all that I looked at Mouser/Digikey have a tolerance/stability of +/-50ppm. What other better options do I have ?

7th March 2006, 03:43 PM	#8
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	The long-term frequency tolerance is neither here nor there. Would you be able to hear if the music came out 0.005% slow or fast? What is important is the short term variation in frequency known as jitter. Jitter is mostly determined by the circuit around the crystal. Sound cards and CD players typically use appalling circuits which is why Elso Kwak's and Guido Tent's clocks are so popular. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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7th March 2006, 02:33 AM	#3
davidsrsb diyAudio Member Join Date: Dec 2005 Location: Kuala Lumpur	Is this a crystal or a module? If it's just a crystal the accuracy will depend on the capacitors and the oscillator circuit

7th March 2006, 03:11 AM	#4
Bare diyAudio Member Join Date: Dec 2001 Location: vancouver	StarFleet ... Doh! Only the V best will do for your Soundcard

8th March 2006, 07:31 PM	#9
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	In my experience (and I have not tried Guido's stuff!), Valpey Fisher makes killer oscillator modules. Vectron is also supposed to make really good stuff, but they are impossible to communicate with. Phase jitter is what you want to minimize. In the end, the net result is a function of product and implementation. Petter

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