Tom I added 10 degrees and used the built in temp sensor in the tube as a gauge. So its sort of accurate to say 10 degrees. I remember evaluating the temp several ways. I did not return it to original temp as I believed at the time I was baking out the last few Cs. What your saying in the threads very interesting. But don't have time to go back and adjust or reconnect the old oven controller. I would have to look at all of that again to see whats needed. I did this about 2 years ago its in the time nuts archive I suspect. Regards Paul.
On Mon, Sep 23, 2013 at 2:58 PM, Tom Knox <act...@hotmail.com> wrote: > > Hi Paul; > I have heard that it is not so much loss of Cesium, but the Cesium and > contaminate mix sticking to the enclosure walls. The increased heat boils > some of the gunk off. > My question is what if you REALLY heat up the tube for a fairly short > period? How much have you increased temp? and have you tried returning to > original setting once it has locked again? > Thomas Knox > > > > > Date: Mon, 23 Sep 2013 14:29:06 -0400 > > From: paulsw...@gmail.com > > To: time-nuts@febo.com > > Subject: Re: [time-nuts] HP5061B Beam Tubes > > > > Tom > > As far as heating goes thats what I have done and it does work to an > > extent. I still have very low beam. Thats what amazes me most is the darn > > thing actually locks by itself. > > So increasing the temperature is worth a try. > > Regards > > Paul. > > > > > > On Mon, Sep 23, 2013 at 2:16 PM, Tom Knox <act...@hotmail.com> wrote: > > > > > Thanks Corby for adding the link, I should have provided the link in my > > > earlier post. > > > The shipping concern is because Cesium or Caesium metal is highly > reactive > > > and very pyrophoric. In addition to igniting spontaneously in air, it > > > reacts explosively with water even at low temperatures, but the small > > > amount of actual Cesium in a Cesium standard as well as the hardening > > > provided by that tube structure were important factors in it's > exemption. I > > > have recieved and shipped Cesium standards both in the USA and > > > internaionally using the DOT exemption with no problem. I have a hard > case > > > designed specifically for that purpose which came with a Datum 4065C > but is > > > also perfect for the 5071A. It has all the critical warning and > exemption > > > information in metal labels riveted to the outside of the case. I have > seen > > > these cases on eBay from time to time. Be aware there is a limit of how > > > many Cesium standard can be shipped at once under the exemption, I > think it > > > is five. Not really a factor for most of us. > > > In any case I would use extreme caution if you ever open one for > > > examination. To bad some industrious Time-Nut has not started a small > > > business rebuilding Depleted Tubes. I have heard that failure often > occurs > > > when Cesium becomes mixed with contaminants and stuck to the enclosure > > > walls, and there is a method to remove it. I know increasing the cell > temp > > > brings some standards back to life. And perhaps after heating and > boiling > > > the Cesium off he walls the cleaner tube can then be returned to > factory > > > settings? > > > I am sure a number of you have far more expertise and have experimented > > > with these ideas to determine whether there is any truth to these tall > > > tails. If so I am sure I am not the only one that would enjoy hearing > what > > > you know, perhaps on a new thread. > > > Thanks; > > > Thomas Knox > > > > > > > > > > > > > To: time-nuts@febo.com > > > > Date: Sun, 22 Sep 2013 23:57:43 -0700 > > > > From: cdel...@juno.com > > > > Subject: [time-nuts] HP5061B Beam Tubes > > > > > > > > Per the following Symmetricom instructions, HP/Agilent/Symmetricom > tubes > > > > or instruments with tubes are exempt from the Hazmat requirements if > > > > shipped within the USA. You still have to label them per the > instructions > > > > and as stated you are considered "trained" If you understand the > > > > instructions. > > > > > > > > > > > > http://www.symmetricom.com/media/files/downloads/product-datasheets/shipp > > > > ing_instructions.pdf > > > > > > > > > > > > One other source for tubes for your 5060A/5061A/5061B (and 5062C > with a > > > > bit more mods) is to use FTS tubes removed from FTS 4050 and 4060 > units. > > > > Some minor mechanical mods and you have to make adaptor cables but > they > > > > are simple to make. > > > > > > > > Corby > > > > > > > > _______________________________________________ > > > > 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. > > > > > _______________________________________________ > > 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. > _______________________________________________ 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.