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 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 Poul-Henning Kamp <p...@phk.freebsd.dk> Sent: Monday, June 29, 2020 12:16 AM To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com>; ed breya <e...@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 p...@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. _______________________________________________ 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.
