Re: [time-nuts] Cold Rubidium?

2019-11-07 Thread Richard (Rick) Karlquist
Good questions, Hal. This reminds me of the HP Cesium Beam Tube useful life. The standard tube, at least, is such that it is unlikely to last long enough to completely use up the cesium. Then there is the rest of the instrument. My experience with the HP Rubidium units is that if you just

Re: [time-nuts] Cold Rubidium?

2019-11-07 Thread Hal Murray
p.bo...@xs4all.nl said: > We were seriously considering the Muquans clock for a radio astronomy > project. However, the company explained that the device has to be returned > every 3 to 5 years for re-filling. Given the very remote location we were > going to put these in, that was out of the

Re: [time-nuts] Cold Rubidium?

2019-11-07 Thread Paul Boven
Hi Attila, everyone, On 11/3/19 7:12 PM, Attila Kinali wrote: You do not need to replenish the Rb supply, as the Rb atoms do not get used up. They are free floating in vaccuum and get captured by the MOT. Thus, unlike the Cs beam's oven, which just spits the Cs atoms out, the MOT does not need

Re: [time-nuts] Need help in test board pinout for SA22.c oscillator - thanks in advance

2019-11-07 Thread Bob kb8tq
Hi You probably need more heat sinking than that assembly provides. It’s a case of “better to much than to little”. The life of the device will extended with more heat sinking. Bob > On Nov 7, 2019, at 2:47 PM, Fio Cattaneo (.US) wrote: > > Hello folks, I just got a Symmetricom SA22.C

Re: [time-nuts] GSP+PPP and GPSDO NTP servers - notes and questions

2019-11-07 Thread Fio Cattaneo (.US)
Great graphs and screenshots, thanks for sharing  I have a couple questions for you (see answers/comments below): a) Which cmd line tool did you use for the sreenshots in zegar_stats_pl.png and gpsdo_stats_pl.png ? Is that what you call your "simple perl script"? mind sharing it, I like it  b)

[time-nuts] Syncing time via a VGA connector

2019-11-07 Thread folkert
Hi, For fun I hooked up a TCXO to an Arduino. That Arduino then interfaces the TCXO to the I2C in the VGA connector and then with some magic code, it syncs the PPS signal to NTP. https://vanheusden.com/misc/blog/2019-11-07.php Curious what you think. Regards, Folkert van Heusden --