Hi Michael; I know Craig Nelson, Archita Hati, and Dave Howe were doing some related research at NIST. I did a quick search and think this may be the paper, but there may be others. As I remember cable vibration can be a greater uncertainty then the oscillator. https://www.intechopen.com/books/aerial_vehicles/vibration-induced_pm_noise_in_oscillators_and_its_suppression [https://cdn.intechopen.com/books/images_new/3696.jpg]<https://www.intechopen.com/books/aerial_vehicles/vibration-induced_pm_noise_in_oscillators_and_its_suppression> Vibration-Induced PM Noise in Oscillators and Its Suppression | IntechOpen<https://www.intechopen.com/books/aerial_vehicles/vibration-induced_pm_noise_in_oscillators_and_its_suppression> Archita Hati, Craig Nelson and David Howe (January 1st 2009). Vibration-Induced PM Noise in Oscillators and Its Suppression, Aerial Vehicles, Thanh Mung Lam, IntechOpen, DOI: 10.5772/6476. Available from: www.intechopen.com Cheers;
Tom Knox SR Test and Measurement Engineer Ascent Concepts and Technology 4475 Whitney Place Boulder Colorado 80305 303-554-0307 act...@hotmail.com "Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein ________________________________ From: time-nuts <time-nuts-boun...@lists.febo.com> on behalf of Tom Van Baak <t...@leapsecond.com> Sent: Saturday, June 27, 2020 12:56 PM To: time-nuts@lists.febo.com <time-nuts@lists.febo.com> Subject: 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 t...@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@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@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@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.