Twelve years ago I did disassemble a regular and a high performance tube, the only negative effect was I joined time nuts. The guts still decorate my window sill. The only parts inside that may be temperature sensitive are some copper wires with a clear coating. Every thing else is metal or ceramic. Bert Kehren In a message dated 9/23/2013 5:44:22 P.M. Eastern Daylight Time, j...@miles.io writes:
I've always wanted to try baking the entire tube to vaporize any accumulations of Cs metal outside the internal oven. Is that what you did, Paul? If some of the free cesium metal near the detector can be recondensed at the oven end, or just redistributed uniformly throughout the tube, it might render a noisy tube usable again. The point at which cesium vaporizes is 250C / 482F, and that seems like it could be survivable unless there are thermoplastic structures or insulation sleeves inside the tube for some reason. The operation might be tricky, because while you wouldn't want to heat the tube sufficiently to vaporize all of the remaining cesium in the internal oven, you would also need to bake the tube for quite some time to heat its internal structures uniformly, since it's basically a vacuum bottle. Outgassing from various internal materials and structures would also be a concern. Something to try with a tube that is otherwise ready for the scrap heap... -- john, KE5FX Miles Design LLC > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts- > boun...@febo.com] On Behalf Of paul swed > Sent: Monday, September 23, 2013 12:52 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] HP5061B Beam Tubes > > 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. _______________________________________________ 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.