[time-nuts] Vibration isolation of quartz oscillators

[timeok at timeok.it]

   Hi,

   in pictire one of the solutions I have adopted as a precaution against vibrations. In the first pic an OCXO with 4 small shock absorbers that you can also find in the second photograph together with other types that I have recovered in some radio links. They were mainly used to protect the VCOs  oscillators from vibrations.

   Another precaution is to work on the flexibility of the DC / RF connections because they become part of the physical stability project.

   Luciano

   Luciano P. S. Paramithiotti
   timeok at timeok.it
   www.timeok.it

   Da "time-nuts" time-nuts-bounces at lists.febo.com
   A time-nuts at lists.febo.com
   Cc
   Data Sat, 27 Jun 2020 11:56:35 -0700
   Oggetto Re: [time-nuts] Vibration isolation of quartz oscillators
   Michael,

   These are really good oscillators so in addition to guessing what sounds
   like a good solution verify with actual vibration / acceleration
   experiments.

   Last year I tested some Oscilloquartz BVA's for axis sensitivity to
   acceleration. It's quite easy. Some plots here:

   http://leapsecond.com/pages/bva-rotate/

   At the end of that page are two videos showing the Arduino-driven
   stepper motor rotating platform that I used. If anyone can't view the
   videos let me know off-list (my email is tvb at leapsecond.com).

   If you end up doing something similar I would very much like to see how
   your results compare.

   Thanks,
   /tvb


   On 6/27/2020 5:02 AM, Michael Wouters wrote:
   > I have three Oscilloquartz 8607-Bs that I'm rehousing.
   >
   > In their former life they were part of the frequency synthesis chains
   > for H-masers and they hung vertically from a rubber suspension that was
   > presumably intended to provide vibration isolation. Unfortunately, the
   > person responsible for this has long since retired so is no longer
   > around to ask questions of.
   >
   > In the experiment I will be averaging over 100 s, which suggests to
   > me that very low frequencies are what I need to filter out (if at
   > all), and I am skeptical that the rubber will do this. Space is tight
   > so I am wondering
   > whether I should simply ditch the isolation.
   >
   > What do other people do with their quartzes ? I thought I should ask
   > for some advice before attempting measurements.
   >
   > Cheers
   > Michael
   >
   > _______________________________________________
   > time-nuts mailing list -- time-nuts at lists.febo.com
   > To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
   > and follow the instructions there.
   >

   _______________________________________________
   time-nuts mailing list -- time-nuts at lists.febo.com
   To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
   and follow the instructions there.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IMG_20200628_094029.jpg
Type: image/jpeg
Size: 138647 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20200628/c04be93c/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IMG_20200628_094300.jpg
Type: image/jpeg
Size: 143331 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20200628/c04be93c/attachment-0001.jpg>