[time-nuts] Vibration isolation of quartz oscillators

[Michael Wouters]

Hello Tom,
(and thanks everyone for your advice)
I want to do the same as you: rack mount the oscillators. Elaborate
vibration isolation solutions are not possible in the available space viz 3
to 4 RU.


I have the manufacturer’s test data for the oscillators, plus my own test
data, so I think I will just make a trial test with the existing isolation
system and then see if there any problems when in the rack.


Cheers
Michael

On Tue, 30 Jun 2020 at 2:52 am, Tom Knox <actast at hotmail.com> wrote:

> I am enjoy this Nth degree Vibration Isolation discussion. Countless
> amazing tables where I work.
> I have been focused on more practical solutions for Vibration isolation of
> my rack mount oscillators in my home lab, and I think at that level in some
> ways are focused on eliminating resonances as well as trading one frequency
> for another taking higher intensity "square waves" and dissipating them
> over time.
> Any thoughts?
> Cheers;
>
> Tom Knox
>
> SR Test and Measurement Engineer
>
> Ascent Concepts and Technology
> Much
> 4475 Whitney Place
>
> Boulder Colorado 80305
>
> 303-554-0307
>
> actast at hotmail.com
>
> "Peace is not the absence of violence, but the presence of Justice" Both
> MLK and Albert Einstein
>
> ________________________________
> From: time-nuts <time-nuts-bounces at lists.febo.com> on behalf of
> Poul-Henning Kamp <phk at phk.freebsd.dk>
> Sent: Monday, June 29, 2020 12:16 AM
> To: Discussion of precise time and frequency measurement <
> time-nuts at lists.febo.com>; ed breya <eb at telight.com>
> Subject: Re: [time-nuts] Vibration isolation of quartz oscillators
>
> --------
> ed breya writes:
>
> > The nicest optical bench I've ever seen in person, was in one of our
> > labs many years ago. It was a huge, precisely flat polished granite slab
> > about 6-8" thick, about 4x8' or maybe 5x10', mounted on active-leveling
> > pneumatic bladders. It was loaded with thousands of threaded inserts,
> > uniformly spaced on a grid, for mounting optical devices and equipment.
>
> It is worth foot-noting here, that at that level of quality they
> are usually not made from natural granite, but rather from
> "epoxy-granite", which can be designed to have very low temp-co.
>
> > There are lower-grade type platforms available, commonly called "optical
> > breadboards," that are made from thick sheets of aluminum or stainless
> > steel, [...]
>
> and these obviously have a sizeable temp-co, so the money you saved on
> your bench you get to spend on your air-con.
>
> They are a lot easier to move around though.
>
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
>
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