Cybershaft rubidium clock...low priced option?

[jabbr]

Hi John

 

Any thoughts on swapping out the XO directly on the PCB?

 

These days, some DACs seem to be encouraging this with 14/4 DIP compatible PCB lands. And in most (all?) cases there are only 3 pins to solder.

 

The top-end XO's and OCXO's seem to be around the $400 mark, which is a fair bit cheaper than these offboard clocks. (Which are admittedly much better looking than my soldering!)

 

Not sure what happened to John's post as it's blank but very well said.

[jabbr]

The most important number for audio is the close-in phase noise e.g. @1hz in the above specifications

 

 

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[jabbr]

Yes, but unfortunately it has 10MHz sine wave output. For me, I would need a synthesizer to generate a 44.1 or 48kHz sine wave.

 

Yeah, entirely unclear what the actual phase error at the DAC would be given the long journey from an external source through synthesizers etc. there are low jitter synthesizers but if PLL involved the the really close in phase noise e.g. 1hz is highly likely under the PLL corner frequency. I think $30k would be a huge waste much better spent on a DAC with a great clock if it's own.