Tube clock???

[quantran]

Hi all

I found this link

http://www.thesoundofthevalve.it/AHNjoeTjoeb4000_super_tube_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]

The tube appears to be a triod

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

 

[poynton]

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]

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.

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

 

[kevinkr]

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]

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

 

[jean-paul]

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

 

[lucpes]

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

 

[kevinkr]

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

 

[quantran]

Could it be a Pierce oscillator?

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