[time-nuts] Re: High precision OCXO supplier for end costomers

[Bob kb8tq]

Hi

An equally important part of this:

What are you driving with this OCXO and what is it’s measured noise floor
at 1 Hz (or 10 Hz or what ever ….). In some cases a “crazy” OCXO is actually
quieter than the device it is driving. That means that the last 5 or 10 db in phase
noise improvement really has zero impact on the system performance. I’ve run 
into this a *lot* of times over the years. 

Bob

> On Jan 10, 2022, at 12:07 PM, Norman Reitz via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hi Stefan,
> Bernd said it allready. If you once notice the result of a "better" clock with lower phase noise, you dont want to miss it anymore. Even if there is a lot of vodoo and pseudo-sciences in the audio sector - and audio-nuts can talk  hours about things no scientist ever heard about. But the improvement of phase noise is not an imagination. We are not talking about making something just "work". 
> In worst case, phase noise can lead to bit errors. better/lower phase noise clocks will produce a better musical flow, better dynamics, better representation of details and details that were notbeeing noticed before. And don't forget - the quality of the power supply is not entirely unimportant ;-)
> kind regards
> Norman
>    Am Montag, 10. Januar 2022, 15:52:59 MEZ hat Stefan Heinzmann <stefan_heinzmann at gmx.de> Folgendes geschrieben:  
> 
> I'm curious, too, what kind of audio application requires this level of
> phase noise performance, and why.
> 
> Cheers
> Stefan
> 
> Am 10.01.2022 um 12:35 schrieb Attila Kinali:
>> On Mon, 10 Jan 2022 08:26:26 +0000 (UTC)
>> Norman Reitz via time-nuts <time-nuts at lists.febo.com> wrote:
>> 
>>> I am looking for suppliers of high-quality OCXO in 10 Mhz (sine / square) and 25 Mhz sine wave output.
>> 
>> Try contacting Bernd Neubig at Axtal. He is a fellow time-nut and likely to be
>> open to supply you with what you need.
>> 
>> That said, are yo sure you need such stringend phase noise requirements?
>> It's audio. Nobody is going to hear whether the noise is -60dBc or -80dBc @ 1Hz,
>> much less -120dBc. As you have noticed, what you want is not readily available.
>> There are only a handful OCXO available that reach that level. One of them is
>> the famous Oscilloquartz 8607 and its successor the Rakon HSO13/HSO14. But be prepared
>> to pay the price of a small car for each of them. And there is the NEL ULPN OCXO 1714a,
>> but I don't know how much that one costs.
>> 
>> 
>>                 Attila Kinali
>> 
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