Hi Nope, the main issue is that “space benign” (to use the old Mil-HBK-217 term) is indeed pretty benign. No air pressure change to worry about and a pretty narrow temperature range. Also not a lot of shock and vibration (once you get there ….) :)
Bob > On May 7, 2019, at 5:40 PM, jimlux <jim...@earthlink.net> wrote: > > On 5/7/19 2:16 PM, Bob kb8tq wrote: >> Hi >> Well, given the price, running it in a thermal-vac chamber would not >> significantly increase >> the charges to your credit card :) > > But perhaps Poul-Henning was thinking about the gravitational force. > So you could buy two, and drop them alternately down a pair of evacuated drop > towers. > > > I did notice that the temperature range is quite small for flight hardware > (typical design range might be -10 to +55) - but then, they're mounted in a > fairly large satellite and that's basically putting the thermal engineering > responsibility on the satellite bus engineers. Holding within 5 degrees > nominal is fairly straightforward > > it's people wanting to hold milliKelvins that are the ones making trouble. > > >> Bob >>> On May 7, 2019, at 3:23 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: >>> >>> -------- >>> In message <bfac22a1-27ae-4b1f-8fdf-eec87133b...@n1k.org>, Bob kb8tq writes: >>> >>>> In terms of “I don’t want one” …. well, they are pretty much the best Rb >>>> ever >>>> made anywhere / ever. They are as close as you will get to a maser and >>>> not *be* a maser. >>> >>> Rumours has it that the design is optimized for space use and therefore >>> not quite as fantastic at sea-level. >>> >>> -- >>> 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. _______________________________________________ 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.
