Bob Did go looking on the internet. I had quite a laugh because indeed our friends at Amazon and Ebay will happily sell you a 1 gram vile of Cesium. $226. By the way thats free shipping. Chuckle. No mention of shipping issues. Letting this part of the thread drop. Someone gets a nice reference if it works. Regards Paul
On Sat, May 19, 2018 at 3:49 PM, paul swed <[email protected]> wrote: > Bob > I believe that the Cesium 133 as I recall actually isn't. > There was a document from HP. But its been a long time. > I will bet folks ship the 5061s all the time without a thought either way. > Just saying. Neither right or wrong. > > Regards > Paul > > On Sat, May 19, 2018 at 2:18 PM, Bob kb8tq <[email protected]> wrote: > >> Hi >> >> Ok …. errr …. shipping …. about that. >> >> Cs is classified rightly as a hazardous substance. Transporting and >> shipping >> hazardous stuff is indeed regulated (as it should be). For various silly >> reasons >> the minute amount of Cs inside a virtually indestructible container in a >> Cs >> standard falls into the hazardous category. >> >> So, to properly ship a Cs standard, you need to be properly trained and >> certified >> as a Hazmat shipper. You then need to register that training certificate >> with your >> favorite shipper and verify that they accept the certificate. They then >> come out >> and check your paperwork system to be sure it’s up to the proper >> standards. >> Once all that is accomplished you can originate a shipment of a Cs >> standard. >> Yes, there are a couple of fees involved in all that. >> >> If all that sounds trivial or easy …. it’s not. Figure on a coupe of >> months to get >> it all done. Once you do get it all done you can put a nice big Hazmat >> label on >> the package and ship it out ( with of course an added charge for handling >> the rest of the process ). If you do it once you at least will know what >> is needed >> for the annual renewal of certification and re-inspection process. ( and >> the fees >> involved ….) >> >> So ….errrr …. yes. The bottom line is that even if a railroad locomotive >> hits >> the UPS truck, you aren’t going to get Cs all over the place. The risk of >> actually >> hurting anybody with Cs is essentially zero. This whole shipping process >> is >> probably not as risky as crossing the street when the “don’t walk” sign >> is flashing. >> >> Be aware though that if you are shipping one and label it as a Cs >> standard, ( without >> all the proper Hazmat shipping certifications ) you may get into all >> sorts of nonsense. >> If somebody spots it ( and that has happened ) your package is not going >> to get delivered. >> If it is in transit when noticed ( = they already accepted it) It >> probably is not going to get >> returned to you. I’d bet you at least get a bill for disposing of it …. >> >> Equally if you ship one and don’t do it properly there is a slight chance >> of it getting >> noticed ( think in terms of a damaged box that gets attended to ) …. at >> that point >> all sorts of nasty legal sorts of things could happen. >> >> Just another of life’s little pieces of excitement …. >> >> Bob >> >> > On May 19, 2018, at 1:36 PM, paul swed <[email protected]> wrote: >> > >> > Bobs >> > Comments are on target. >> > The Cesium can last a long time on the shelf. But (Always a but) other >> > stuff in the tube tends to pollute the tube. >> > This causes the high current when you start the system that may or may >> not >> > clear up.Some great time-nuts threads on the subject and how to attempt >> to >> > recover the tube. >> > >> > In my experience after the tubes up and running and in a locked state. >> The >> > beam current is relative. About 20-40 is good. >> > The issue is there are some settings that can totally fake this reading >> out >> > like the meter sensitivity. As the current goes down you see more of the >> > noise floor of the system that deteriorates the quality. Funny fact >> > Frankenstein 5060/61 mix has barely originally showed .5 on the beam >> > current. Yet still locks. Today beam current is 0 and its still locks. >> The >> > tube was deemed dead when it was given to me. In comparing it to another >> > much later 5061 it is indeed locked nicely. >> > >> > The option 004 tubes run hot and consume Cs more rapidly. Dead 004 tubes >> > are pretty much dead. >> > >> > As I recall in the manual there is a way to directly read the true beam >> > current (If you actually have any) right off the tube. >> > So some lucky sole in this tread will finally have a real ticking clock. >> > Congrats and have fun. I think the darn clocks go for as much as Doug is >> > asking. Shipping was about $130 or so from Az to Ma about a year ago >> when I >> > picked up my 2nd 5061. >> > I think this is a bit cheap as it came from a company that most likely >> gets >> > a discount we don't. >> > >> > Regards >> > Paul >> > WB8TSL >> > >> > >> > On Sat, May 19, 2018 at 1:02 PM, Bob kb8tq <[email protected]> wrote: >> > >> >> Hi >> >> >> >> >> >> >> >>> On May 19, 2018, at 11:22 AM, Dana Whitlow <[email protected]> >> >> wrote: >> >>> >> >>> Don't Cesium clocks have a beam current integrator of sorts so that >> it's >> >>> possible >> >>> to pretty accurately assess the remaining life of the tube? If not, >> I'm >> >>> terribly >> >> >> >> Simple answer - no. The ones we are playing with came out *long* before >> >> you could do >> >> anything like that in a practical way. Even today I know of no atomic >> >> standard made by >> >> anybody that does something like that. >> >> >> >> >> >>> surprised and disappointed. >> >>> >> >>> Also, beginning with a new tube, roughly how long can one be run >> until it >> >>> reaches exhaustion? Are we speaking months, years, decades, or what? >> >> >> >> >> >> Rated life on a high performance tube is in the 5 to 7 year range. I >> have >> >> indeed proven that >> >> to be correct with a couple of tubes run on a 24/7/365 basis. A >> “standard >> >> grade” tube should >> >> run for 2 or 3 times that long. A lot depends on exactly which model >> tube >> >> from what era and >> >> who made the specific tube. >> >> >> >> Tubes are not the only thing that dies in a Cs standard. The older >> ones ( >> >> = what we play with) >> >> are mostly full of leaded parts described in manuals and schematics. >> They >> >> may not all be made >> >> anymore, but various substitutes are out there. Also, chassis for Cs >> >> standards with dead >> >> tubes are pretty common. It’s the tubes we are most likely to run out >> of …. >> >> >> >> Of course you *can* get a nice new tube from the factory. Last time I >> did >> >> that the bill was >> >> about $38,000. That included them putting it in. >> >> >> >> Bob >> >> >> >>> >> >>> Dana >> >>> >> >>> >> >>> On Sat, May 19, 2018 at 10:01 AM, Bob kb8tq <[email protected]> wrote: >> >>> >> >>>> Hi >> >>>> >> >>>> Unfortunately there really is no way to tell how much Cs is left in >> the >> >>>> tube. You can >> >>>> look at beam current and make a guess. All that really will tell you >> is >> >>>> that the fuel >> >>>> gauge is on empty or at least just off of empty. >> >>>> >> >>>> Bob >> >>>> >> >>>>> On May 19, 2018, at 2:30 AM, Paul Bicknell <[email protected]> >> >>>> wrote: >> >>>>> >> >>>>> Hi Doug >> >>>>> >> >>>>> Is it possible to test its operation and >> >>>>> can the time left on the cesium be calculated Regards Paul >> >>>>> >> >>>>> -----Original Message----- >> >>>>> From: time-nuts [mailto:[email protected]] On Behalf Of >> Doug >> >>>> Millar >> >>>>> via time-nuts >> >>>>> Sent: 19 May 2018 05:04 >> >>>>> To: [email protected] >> >>>>> Subject: [time-nuts] Cesium Clock Avialable >> >>>>> >> >>>>> Hi, I am willing to part with my HP 5061A cesium standard and >> manual. >> >> The >> >>>>> unit was rebuilt and functioning some years ago and not used since >> >> then. >> >>>>> There is usable cesium in the tube and the unit worked. I have not >> >>>> tested it >> >>>>> recently. It has a Patek-Philippe analogue clock in the front. The >> unit >> >>>> is >> >>>>> in great physical condition. Asking $600 plus shipping from Long >> >> Beach, >> >>>> CA. >> >>>>> 90806 >> >>>>> I also have an ESI 242D resistance calibrator and a Julie primary >> >>>> resistance >> >>>>> standard in an oven. Let me know if you are interested. Very >> >> reasonable. >> >>>>> Thanks, Doug K6JEY >> >>>>> _______________________________________________ >> >>>>> time-nuts mailing list -- [email protected] >> >>>>> To unsubscribe, go to >> >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >>>>> and follow the instructions there. >> >>>>> >> >>>>> >> >>>>> ----- >> >>>>> No virus found in this message. >> >>>>> Checked by AVG - www.avg.com >> >>>>> Version: 2016.0.8048 / Virus Database: 4793/15670 - Release Date: >> >>>> 05/19/18 >> >>>>> >> >>>>> _______________________________________________ >> >>>>> time-nuts mailing list -- [email protected] >> >>>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >>>> mailman/listinfo/time-nuts >> >>>>> and follow the instructions there. >> >>>> >> >>>> _______________________________________________ >> >>>> time-nuts mailing list -- [email protected] >> >>>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >>>> mailman/listinfo/time-nuts >> >>>> and follow the instructions there. >> >>>> >> >>> _______________________________________________ >> >>> time-nuts mailing list -- [email protected] >> >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >> mailman/listinfo/time-nuts >> >>> and follow the instructions there. >> >> >> >> _______________________________________________ >> >> time-nuts mailing list -- [email protected] >> >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> >> mailman/listinfo/time-nuts >> >> and follow the instructions there. >> >> >> > _______________________________________________ >> > time-nuts mailing list -- [email protected] >> > To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> > and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
