[time-nuts] Vibration isolation of quartz oscillators

[Bob kb8tq]

Hi

There are tables made for low vibration test setups. They are (essentially) a big heavy cast 
iron table sitting on air cushions under each of the legs. Not a great approach for a low G 
OCXO ….

Bob

> On Jun 27, 2020, at 8:09 PM, Neville Michie <namichie at gmail.com> wrote:
> 
> An old trick I learned from an Australian standards lab was to make a vibration free
> table with a 2 foot by 2 foot by 2 inch paving slab supported by a partly inflated 
> wheel barrow inner tube.
> I tried it recently for measurements of force in an electric clock movement 
> and it cut out the background vibration in a spectacular way.
> cheers, Neville Michie
> 
>> On 27 Jun 2020, at 22:02, Michael Wouters <michaeljwouters at gmail.com> 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.