[time-nuts] Re: in-ground clock room

2021-09-10 Thread Hendrik
arduino (or something analog or a mix) use the geophone feedback for the voice coil to keep the table aligned. BR Hendrik ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To

[time-nuts] PN measurement thesis published

2021-04-05 Thread Hendrik
Hello all, I just realized a friend published her thesis on phase-noise measurement on her blog (in german): http://www.stefanie-engelhard.de/sites/default/files/2019-03/Diplomarbeit_Stefanie_Engelhard_0.pdf Best regards, Hendrik ___ time-nuts

Re: [time-nuts] Vibration isolation of quartz oscillators

2020-06-27 Thread Hendrik
You might try a sandwich of rubbery or foamy stuff alternating with heavy, stiff stuff, like silicon pads/steel plate. And keep air drafts away. At least that method I am about to try to decouple my geophones during experiments. BR Hendrik

[time-nuts] Pulchron

2018-12-24 Thread Hendrik
Hello List! Just got a link to a fresh release from ESA: They dedicate a H MASER at Estec to steer it with Pulsar measurements from 5 european radio telescopes and compare it to the adjacent ESA UTC lab, which equipped with 3 H MASER and 3 Cs clocks. http://www.esa.int/Our_Activities/Navigat