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-   -   New clock abandons Rb ? (https://www.audioaficionado.org/showthread.php?t=49580)

TOGA 02-23-2021 01:21 PM

New clock abandons Rb ?
 
1 Attachment(s)
Attachment 64254

W9TR 02-23-2021 03:22 PM

Makes sense. Rubidium elements are very noisy - it is after all a plasma stream! So Rb clocks for audio have a crystal oscillator long term slaved to the Rb element anyway.

Since long term accuracy isn’t that important for audio, a super low noise crystal oscillator alone will do the trick.

Robert_Anderson 02-23-2021 03:51 PM

We use Rubidium in the frequency standard of the radar I work on. Like any product, the reference quality is subjective the quality of manufacture. We went from a nicer old unit to a cheaper new unit made the company who bought the old company out. Cheaper units will drift from center frequency. I have two Esoteric clocks in my systems and none have been noisy or had any issues, which I would expect from a high quality company like Esoteric. I look forward to checking out the new product line.

SCAudiophile 02-23-2021 04:42 PM

Quote:

Originally Posted by W9TR (Post 1033270)
Makes sense. Rubidium elements are very noisy - it is after all a plasma stream! So Rb clocks for audio have a crystal oscillator long term slaved to the Rb element anyway.

Since long term accuracy isn’t that important for audio, a super low noise crystal oscillator alone will do the trick.

100% spot on! Rubidium (Rb) and Cesium (Cs) have noisy atomic decay and while they can be used as master timing references over many years, decades amd millions of years hat is not the best approach for music where lowest phase noise and best short term stability are most important.

PHC1 02-23-2021 05:10 PM

https://youtu.be/yoKqnBJN8iQ

SCAudiophile 02-23-2021 05:18 PM

Quote:

Originally Posted by PHC1 (Post 1033288)

Serge: Great video...have seen it before. Thanks for posting!

PHC1 02-23-2021 05:19 PM

Quote:

Originally Posted by SCAudiophile (Post 1033290)
Serge: Great video...have seen it before. Thanks for posting!

:tiphat:

SCAudiophile 02-23-2021 05:25 PM

Quote:

Originally Posted by PHC1 (Post 1033291)
:tiphat:

Love the quote at the end...

PHC1 02-23-2021 05:44 PM

Quote:

Originally Posted by SCAudiophile (Post 1033293)
Love the quote at the end...

Yes, but it is also worth keeping in mind the magnitude of overdramatization that is inherent to all things audio.

How audible is jitter?


http://www.sereneaudio.com/blog/what...ter-sound-like

SCAudiophile 02-23-2021 06:00 PM

Quote:

Originally Posted by PHC1 (Post 1033294)
Yes, but it is also worth keeping in mind the magnitude of overdramatization that is inherent to all things audio.

How audible is jitter?


http://www.sereneaudio.com/blog/what...ter-sound-like

That's a fantastic page and really puts things in perspective!


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