Re: [time-nuts] HP5061B Beam Tubes
I have numbers of pix. Each is 2 MB so need another way to handle it. You will get a good feel from the pictures what I did. Schematic is paper. Lots of notes I would have to re-decode. It was Oct 2011. Regards Paul WB8TSL On Mon, Sep 23, 2013 at 8:14 PM, wb6bnq wb6...@cox.net wrote: Hi Bert, Any chance of some high resolution photos ? BillWB6BNQ ewkeh...@aol.com wrote: 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-nutshttps://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-nutshttps://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-nutshttps://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.
Re: [time-nuts] HP5061B Beam Tubes
Did send Bill some pictures off list Bert Sent from Samsung tabletpaul swed paulsw...@gmail.com wrote:I have numbers of pix. Each is 2 MB so need another way to handle it. You will get a good feel from the pictures what I did. Schematic is paper. Lots of notes I would have to re-decode. It was Oct 2011. Regards Paul WB8TSL On Mon, Sep 23, 2013 at 8:14 PM, wb6bnq wb6...@cox.net wrote: Hi Bert, Any chance of some high resolution photos ? BillWB6BNQ ewkeh...@aol.com wrote: 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-nutshttps://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-nutshttps://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-nutshttps://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.
Re: [time-nuts] HP5061B Beam Tubes
Sure be nice if you could put them up on some photo site and let us see them. - Original Message - From: ewkehren ewkeh...@aol.com To: time-nuts@febo.com Sent: Tuesday, September 24, 2013 12:28 PM Subject: Re: [time-nuts] HP5061B Beam Tubes Did send Bill some pictures off list Bert Sent from Samsung tabletpaul swed paulsw...@gmail.com wrote:I have numbers of pix. Each is 2 MB so need another way to handle it. You will get a good feel from the pictures what I did. Schematic is paper. Lots of notes I would have to re-decode. It was Oct 2011. Regards Paul WB8TSL On Mon, Sep 23, 2013 at 8:14 PM, wb6bnq wb6...@cox.net wrote: Hi Bert, Any chance of some high resolution photos ? BillWB6BNQ ewkeh...@aol.com wrote: 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-nutshttps://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-nutshttps://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-nutshttps://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] HP5061B Beam Tubes
The military, who used the most 5062C, Actually had an maintenance note about increasing the Cesium oven temperature to get the last bit of life out of the tube. On the 5061A/B tubes the STD tube runs at 85C and the high perf. at 115 to 132 C (marked on tube label) You can measure the temp by clipping a thermocouple meter to the two exposed leads poking out of the RTV. select a new oven set resistor to increase the temp by 20 degrees and see what you get. About heating the entire tube, mght not be a good idea as all the stuff in the gettering would get released and you might not be able to pump down to vacuum again! Also too hot and the magnets might weaken! 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.
Re: [time-nuts] HP5061B Beam Tubes
Some nice ones here -- google for: cesium beam tube /tvb (iPhone) On Sep 24, 2013, at 9:40 AM, Tom Miller tmil...@skylinenet.net wrote: Sure be nice if you could put them up on some photo site and let us see them. - Original Message - From: ewkehren ewkeh...@aol.com To: time-nuts@febo.com Sent: Tuesday, September 24, 2013 12:28 PM Subject: Re: [time-nuts] HP5061B Beam Tubes Did send Bill some pictures off list Bert Sent from Samsung tabletpaul swed paulsw...@gmail.com wrote:I have numbers of pix. Each is 2 MB so need another way to handle it. You will get a good feel from the pictures what I did. Schematic is paper. Lots of notes I would have to re-decode. It was Oct 2011. Regards Paul WB8TSL On Mon, Sep 23, 2013 at 8:14 PM, wb6bnq wb6...@cox.net wrote: Hi Bert, Any chance of some high resolution photos ? BillWB6BNQ ewkeh...@aol.com wrote: 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-nutshttps://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-nutshttps://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-nutshttps://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.
[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.
Re: [time-nuts] HP5061B Beam Tubes
Hi That link does not lead to anything. Bob On Sep 23, 2013, at 2:57 AM, cdel...@juno.com wrote: 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.
Re: [time-nuts] HP5061B Beam Tubes
http://www.symmetricom.com/media/files/downloads/product-datasheets/shipp ing_instructions.pdf That link does not lead to anything. Line wrap. You have to glue the pieces back together. -- These are my opinions. I hate spam. ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
It does if you append the bit in the following line ie append ing_instructions.pdf. to form: http://www.symmetricom.com/media/files/downloads/product-datasheets/shipping_instructions.pdf Bruce Bob Camp wrote: Hi That link does not lead to anything. Bob On Sep 23, 2013, at 2:57 AM, cdel...@juno.com wrote: 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.
Re: [time-nuts] HP5061B Beam Tubes
On 9/23/2013 7:32 AM, Bob Camp wrote: On Sep 23, 2013, at 2:57 AM, cdel...@juno.com wrote: 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 That link does not lead to anything. It works fine, and points to a pdf containing Shipping Instructions for Caesium Devices You do have to put the link back together, since it's longer than the convention for line length. ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Link works for me but you must copy the ENTIRE link for it to work. On 9/23/2013 7:32 AM, Bob Camp wrote: http://www.symmetricom.com/media/files/downloads/product-datasheets/shipp ing_instructions.pdf ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
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.
Re: [time-nuts] HP5061B Beam Tubes
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.
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.
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. 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
Re: [time-nuts] HP5061B Beam Tubes
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.
Re: [time-nuts] HP5061B Beam Tubes
Hi Tried that, didn't work. Works now. Bob On Sep 23, 2013, at 7:46 AM, Hal Murray hmur...@megapathdsl.net wrote: http://www.symmetricom.com/media/files/downloads/product-datasheets/shipp ing_instructions.pdf That link does not lead to anything. Line wrap. You have to glue the pieces back together. -- These are my opinions. I hate spam. ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Hi What the exemption allows you to do is to ship it at all via Fed Ex or UPS. If you read through it, the mandatory employee training and certification requirement is in the pdf. As soon as your local FedEx guy sees the big yellow stickers, things get complicated. Getting the 5071 shipped was a *major* hassle. Bob On 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.
Re: [time-nuts] HP5061B Beam Tubes
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.
Re: [time-nuts] HP5061B Beam Tubes
As I mentioned I ran the oven 10 degrees hotter. To do that I needed to build a new oven controller. Thats was it. Regards Paul. On Mon, Sep 23, 2013 at 6:27 PM, ewkeh...@aol.com wrote: 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. ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Hi Bert, Any chance of some high resolution photos ? BillWB6BNQ ewkeh...@aol.com wrote: 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. ___ 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] HP5061B Beam Tubes
What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Hi Well I can answer that one. Sending a 5071 back to Symmetricom and getting a new high performance tube in it is roughly a $35K hit to the old Visa card. The hard part is getting all the shipping doc's filled out for the ultra hazardous Cs that you are shipping. You have to go to a class and get a certificate just to fill out the forms…. Perish forbid *anybody* would ever ignore those regulations and carry one on a passenger flight ……. -- Just in case you missed all the previous posts. There isn't enough Cs in a standard to harm much of anything Its so well protected that a drop off a 4 story building won't release any of it. Regardless of all that it's Hazmat. Bob On Sep 22, 2013, at 5:32 PM, Pete Lancashire p...@petelancashire.com wrote: Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
No mention of price or availability (this is a 1999 document) but KO4BB has this: http://www.ko4bb.com/Manuals/HP_Agilent/HP_5061A_Cesium_Beam_Frequency_Stand ard/datum_replacement_cs_tube_5061a_specs.pdf Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Sunday, September 22, 2013 14:33 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP5061B Beam Tubes Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
The HP and Symmetricom Cesium standards have a hazmat exemption. Thomas Knox From: li...@rtty.us Date: Sun, 22 Sep 2013 17:46:18 -0400 To: time-nuts@febo.com Subject: Re: [time-nuts] HP5061B Beam Tubes Hi Well I can answer that one. Sending a 5071 back to Symmetricom and getting a new high performance tube in it is roughly a $35K hit to the old Visa card. The hard part is getting all the shipping doc's filled out for the ultra hazardous Cs that you are shipping. You have to go to a class and get a certificate just to fill out the forms…. Perish forbid *anybody* would ever ignore those regulations and carry one on a passenger flight ……. -- Just in case you missed all the previous posts. There isn't enough Cs in a standard to harm much of anything Its so well protected that a drop off a 4 story building won't release any of it. Regardless of all that it's Hazmat. Bob On Sep 22, 2013, at 5:32 PM, Pete Lancashire p...@petelancashire.com wrote: Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Hi If so Symmetricom is not aware of that and neither is FedEx or UPS. When you ship in your 5071, they are the ones that put the hazmat requirement on the shipping paperwork. Bob On Sep 22, 2013, at 6:53 PM, Tom Knox act...@hotmail.com wrote: The HP and Symmetricom Cesium standards have a hazmat exemption. Thomas Knox From: li...@rtty.us Date: Sun, 22 Sep 2013 17:46:18 -0400 To: time-nuts@febo.com Subject: Re: [time-nuts] HP5061B Beam Tubes Hi Well I can answer that one. Sending a 5071 back to Symmetricom and getting a new high performance tube in it is roughly a $35K hit to the old Visa card. The hard part is getting all the shipping doc's filled out for the ultra hazardous Cs that you are shipping. You have to go to a class and get a certificate just to fill out the forms…. Perish forbid *anybody* would ever ignore those regulations and carry one on a passenger flight ……. -- Just in case you missed all the previous posts. There isn't enough Cs in a standard to harm much of anything Its so well protected that a drop off a 4 story building won't release any of it. Regardless of all that it's Hazmat. Bob On Sep 22, 2013, at 5:32 PM, Pete Lancashire p...@petelancashire.com wrote: Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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. ___ 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.
Re: [time-nuts] HP5061B Beam Tubes
Yes the Cs are long evaporated. In my frankenstein 5060/5061. I built a new oven controller to cook out the remains. It worked as the system locks and I get 2nd harmonic etc. But we are seriously speaking of fumes. It was bit of fun and it didn't really matter that I was hacking. The 5061 was a $125 flea market special. The 5060 tube was given to me from a fellow time nut and was believed dead. Well its seriously on the last fumes. I do the same thing as above. Fire it up every qtr. See that its still works, marvel that it locks and shut it down after 48 hours. Regards Paul WB8TSL On Sun, Sep 22, 2013 at 7:11 PM, Bob Camp li...@rtty.us wrote: Hi If so Symmetricom is not aware of that and neither is FedEx or UPS. When you ship in your 5071, they are the ones that put the hazmat requirement on the shipping paperwork. Bob On Sep 22, 2013, at 6:53 PM, Tom Knox act...@hotmail.com wrote: The HP and Symmetricom Cesium standards have a hazmat exemption. Thomas Knox From: li...@rtty.us Date: Sun, 22 Sep 2013 17:46:18 -0400 To: time-nuts@febo.com Subject: Re: [time-nuts] HP5061B Beam Tubes Hi Well I can answer that one. Sending a 5071 back to Symmetricom and getting a new high performance tube in it is roughly a $35K hit to the old Visa card. The hard part is getting all the shipping doc's filled out for the ultra hazardous Cs that you are shipping. You have to go to a class and get a certificate just to fill out the forms…. Perish forbid *anybody* would ever ignore those regulations and carry one on a passenger flight ……. -- Just in case you missed all the previous posts. There isn't enough Cs in a standard to harm much of anything Its so well protected that a drop off a 4 story building won't release any of it. Regardless of all that it's Hazmat. Bob On Sep 22, 2013, at 5:32 PM, Pete Lancashire p...@petelancashire.com wrote: Bob basically said it, not only 5061A but most others. I now only run my 5061A every couple months to purge it and when I want to play with my two Rb's and want them adjusted to the 5061A vs GPS. Wonder what a replacement 5071A tube runs now days ... -pete On Sun, Sep 22, 2013 at 1:36 PM, Bob Camp li...@rtty.us wrote: Hi Most of the genuine 5061 tubes out there have either died long ago or wound up in one of the ever smaller number of working 5061's. Bob On Sep 22, 2013, at 3:58 PM, W3KL w...@w3kl.com wrote: What's the story on availability of beam 5061 beam tubes? Does anyone have a supply or know of someone who does who is willing to sell one or more? I'm looking for option 004 tubes if they are available? My 5061B Option 004 is basically kaput.no beam current at all. Thanks. Jeff ___ 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. ___ 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.
