Tube clock???

quantran · 22nd January 2007, 06:41 AM

Hi all

I found this link

http://www.thesoundofthevalve.it/AHN...ube_clock.html

There isn't much info but the photos look very interesting. What does the tube do in this CDP clock? Anyone has information about it?

quantran · 22nd January 2007, 06:44 AM

The tube appears to be a triod

http://oldradio.qrz.ru/tubes/russian/short/6s6b-v.shtml

poynton · 22nd January 2007, 07:11 AM

I would think it was a Colpitts or other 'standard' oscillator using the triode instead of a FET. I dare say squaring is done by a gate.

Does the Xtal have a coil round it ?? or is it just damping material?

Andy

quantran · 22nd January 2007, 07:25 AM

It's seem to be damping material only. From the photos, I do not see any connection from outer of the crystal to the PCB other than 2 legs of the crystal itself.

Quote:

Does the Xtal have a coil round it ?? or is it just damping material?

kevinkr · 22nd January 2007, 01:52 PM

As much as I love tubes (look at my posts elsewhere here) I can't imagine this is anything more than a marketing ruse. There are a lot of compelling reasons to use tubes in the audio path if you are so inclined, but I can't think of a single reason to do this as opposed to say the Kwak clock, LCAudio Lclock XO3 or the TentLabs clock. (Or for that matter a good diy clock if you have the instrumentation and patience to design a low jitter, stable clock. ) Tubes wear out and suffer significant parameter shifts over their useful life.

Of course YMMV..

kevinkr · 22nd January 2007, 02:00 PM

That tube clock is pretty expensive too.. 300 Euro is a lot of money!

jean-paul · 22nd January 2007, 06:33 PM

But it sounds better because it has a tube in it !!

lucpes · 22nd January 2007, 06:43 PM

My wild guess is that it's a voltage rectifier.

kevinkr · 22nd January 2007, 09:49 PM

Looking at it quickly I believe it is actually the active element in the oscillator.

quantran · 23rd January 2007, 01:54 PM

Could it be a Pierce oscillator?

Is it possible that the phase noise caused by the tube is less than that from a transistor?

22nd January 2007, 06:41 AM	#1
quantran diyAudio Member Join Date: Apr 2004 Location: Hanoi	Tube clock??? Hi all I found this link http://www.thesoundofthevalve.it/AHN...ube_clock.html There isn't much info but the photos look very interesting. What does the tube do in this CDP clock? Anyone has information about it? __________________ Quan Tran

22nd January 2007, 06:44 AM	#2
quantran diyAudio Member Join Date: Apr 2004 Location: Hanoi	The tube appears to be a triod http://oldradio.qrz.ru/tubes/russian/short/6s6b-v.shtml __________________ Quan Tran

22nd January 2007, 07:11 AM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	I would think it was a Colpitts or other 'standard' oscillator using the triode instead of a FET. I dare say squaring is done by a gate. Does the Xtal have a coil round it ?? or is it just damping material? Andy __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

22nd January 2007, 01:52 PM	#5
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	As much as I love tubes (look at my posts elsewhere here) I can't imagine this is anything more than a marketing ruse. There are a lot of compelling reasons to use tubes in the audio path if you are so inclined, but I can't think of a single reason to do this as opposed to say the Kwak clock, LCAudio Lclock XO3 or the TentLabs clock. (Or for that matter a good diy clock if you have the instrumentation and patience to design a low jitter, stable clock. ) Tubes wear out and suffer significant parameter shifts over their useful life. Of course YMMV.. __________________ www.kta-hifi.net

22nd January 2007, 02:00 PM	#6
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	That tube clock is pretty expensive too.. 300 Euro is a lot of money! __________________ www.kta-hifi.net


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22nd January 2007, 06:33 PM	#7
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: The Netherlands	But it sounds better because it has a tube in it !! __________________ It's only audio

22nd January 2007, 06:43 PM	#8
lucpes diyAudio Member Join Date: Dec 2003 Location: Iasi	My wild guess is that it's a voltage rectifier. __________________ Deep down inside.

22nd January 2007, 09:49 PM	#9
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Looking at it quickly I believe it is actually the active element in the oscillator. __________________ www.kta-hifi.net

23rd January 2007, 01:54 PM	#10
quantran diyAudio Member Join Date: Apr 2004 Location: Hanoi	Could it be a Pierce oscillator? Is it possible that the phase noise caused by the tube is less than that from a transistor? __________________ Quan Tran

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