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/ > 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.
