They seem to run a while especially if you reheat the bulb as discussed several times in these threads. Sooooo for $38 I am taking the gamble. Have 5 older units and have recovered one of them by reheating the lamp. So far the others are good and I do not run those 24 X 7. Instead should the main go I will grab the next one and use it. Regards Paul. WB8TSL/1
On Sat, Dec 31, 2011 at 2:30 PM, David <davidwh...@gmail.com> wrote: > I agree that they are an amazing value but what kind of operating > lifetime do the Rb tubes have? SRS has this to say: > > >Historically, the lifetime of rubidium frequency standards has been > >dominated by rubidium depletion in the discharge lamp. To avoid excess > >flicker noise, manufacturers would load less than 100 µg of rubidium > >into spherical discharge lamps. The PRS10 uses a lamp with a side arm > >loaded with 1 mg of rubidium. This design eliminates rubidium > >depletion as a failure mechanism, and provides better temperature > >control without excess flicker noise. > > http://www.thinksrs.com/products/PRS10.htm > > On Sat, 31 Dec 2011 18:56:32 -0000, "Rob Kimberley" > <robkimber...@btinternet.com> wrote: > > >I'm also enjoying all the feedback since my original post. > > > >I look at this way; these Rubidiums are probably in the region of $1000 > new. > >We're getting them for a song. OK, you take the risk of the odd dud, but > >that's the way of fleabay. I will let you all know how UK Customs performs > >on my shipment if & when it arrives! > > > >Happy New Year to all Time Nutters out there. > > > >Rob Kimberley > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.