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  #1  
Old 02-23-2021, 01:21 PM
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Default New clock abandons Rb ?

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Old 02-23-2021, 03:22 PM
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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.
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Old 02-23-2021, 03:51 PM
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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.
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Old 02-23-2021, 04:42 PM
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Quote:
Originally Posted by W9TR View Post
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.
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Old 02-23-2021, 05:10 PM
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https://youtu.be/yoKqnBJN8iQ
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Old 02-23-2021, 05:18 PM
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Originally Posted by PHC1 View Post
Serge: Great video...have seen it before. Thanks for posting!
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Old 02-23-2021, 05:19 PM
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Quote:
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Serge: Great video...have seen it before. Thanks for posting!
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Old 02-23-2021, 05:25 PM
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Quote:
Originally Posted by PHC1 View Post
Love the quote at the end...
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Old 02-23-2021, 05:44 PM
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Quote:
Originally Posted by SCAudiophile View Post
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
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Old 02-23-2021, 06:00 PM
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Quote:
Originally Posted by PHC1 View Post
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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