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

What would you estimate the shipping cost to Arizona (ZIP 85641) ? Thanks, Dick, W1KSZ Sent from Outlook<http://aka.ms/weboutlook> ________________________________ From: time-nuts <time-nuts-bounces@febo.com> on behalf of Doug Millar via time-nuts <time-nuts@febo.com> Sent: Friday, May 18, 2018 9:04:17 PM To: time-nuts@febo.com 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 -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

I dug not sure if the previous email went through correctly. I am interested in your cesium clock. My location is Portland Oregon 97217 On Fri, May 18, 2018, 9:31 PM Doug Millar via time-nuts <time-nuts@febo.com> wrote: > 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 -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

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:time-nuts-bounces@febo.com] On Behalf Of Doug Millar via time-nuts Sent: 19 May 2018 05:04 To: time-nuts@febo.com 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 -- time-nuts@febo.com 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

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 <paul@bicknells.f2s.com> 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:time-nuts-bounces@febo.com] On Behalf Of Doug Millar > via time-nuts > Sent: 19 May 2018 05:04 > To: time-nuts@febo.com > 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 -- time-nuts@febo.com > 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 -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

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 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? Dana On Sat, May 19, 2018 at 10:01 AM, Bob kb8tq <kb8tq@n1k.org> 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 <paul@bicknells.f2s.com> > 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:time-nuts-bounces@febo.com] On Behalf Of Doug > Millar > > via time-nuts > > Sent: 19 May 2018 05:04 > > To: time-nuts@febo.com > > 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 -- time-nuts@febo.com > > 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 -- 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. >

  Thanks, Doug K6JEY

Dana, I would suggest downloading and reading the HP journals that discussed the first clocks there's a lot of information in there about how they operate Etc. On Sat, May 19, 2018, 8:23 AM Dana Whitlow <k8yumdoober@gmail.com> 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 > 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? > > Dana > > > On Sat, May 19, 2018 at 10:01 AM, Bob kb8tq <kb8tq@n1k.org> 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 <paul@bicknells.f2s.com> > > 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:time-nuts-bounces@febo.com] On Behalf Of Doug > > Millar > > > via time-nuts > > > Sent: 19 May 2018 05:04 > > > To: time-nuts@febo.com > > > 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 -- time-nuts@febo.com > > > 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 -- 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. >

  Thanks, Doug K6JEY

Along the same lines, I wonder how long a new tube can last on the shelf? About 16 years ago I bought a 5061A on eBay. When I received it I noticed the tube was replaced and still had 2 years on the warranty. It worked just fine. The only problem was the battery charging circuit. Wanting to make it perfect, I started working on repairing it. Needless to say, it is still apart due to a separation in 2013 and a divorce in 2015. I have not touched it since 2012. For me, at 73 now, stairs are not much fun and my old lab is in the basement, but, I wonder if I did brave to go down there would it be worth playing with it again. Thanks for any observations in this regard. Regards – Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell NJ 07731 848-245-9115 -----Original Message----- From: time-nuts <time-nuts-bounces@febo.com> On Behalf Of Pete Lancashire Sent: Saturday, May 19, 2018 11:39 AM To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] Cesium Clock Avialable Dana, I would suggest downloading and reading the HP journals that discussed the first clocks there's a lot of information in there about how they operate Etc. On Sat, May 19, 2018, 8:23 AM Dana Whitlow < <mailto:k8yumdoober@gmail.com> k8yumdoober@gmail.com> 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 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? > > Dana > > > On Sat, May 19, 2018 at 10:01 AM, Bob kb8tq < <mailto:kb8tq@n1k.org> kb8tq@n1k.org> 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 > > > < <mailto:paul@bicknells.f2s.com> paul@bicknells.f2s.com> > > 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:time-nuts-bounces@febo.com> mailto:time-nuts-bounces@febo.com] On Behalf Of > > > Doug > > Millar > > > via time-nuts > > > Sent: 19 May 2018 05:04 > > > To: <mailto:time-nuts@febo.com> time-nuts@febo.com > > > 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 -- <mailto:time-nuts@febo.com> time-nuts@febo.com To unsubscribe, go to > > > <https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > > > > > > ----- > > > No virus found in this message. > > > Checked by AVG - <http://www.avg.com> www.avg.com > > > Version: 2016.0.8048 / Virus Database: 4793/15670 - Release Date: > > 05/19/18 > > > > > > _______________________________________________ > > > time-nuts mailing list -- <mailto:time-nuts@febo.com> time-nuts@febo.com To unsubscribe, go to > > > <https://www.febo.com/cgi-bin/> https://www.febo.com/cgi-bin/ > > mailman/listinfo/time-nuts > > > and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- <mailto:time-nuts@febo.com> time-nuts@febo.com To unsubscribe, go to > > <https://www.febo.com/cgi-bin/> https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow > > the instructions there. > > > _______________________________________________ > time-nuts mailing list -- <mailto:time-nuts@febo.com> time-nuts@febo.com To unsubscribe, go to > <https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- <mailto:time-nuts@febo.com> time-nuts@febo.com To unsubscribe, go to <https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Hi Doug I'm visiting just down the coast and could pick up the HP. If not sold I'll take it. Don AJ7LL On 2018-05-18 22:04, Doug Millar via time-nuts wrote: > 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 -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- Dr. Don Latham PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304

Hi > On May 19, 2018, at 11:22 AM, Dana Whitlow <k8yumdoober@gmail.com> 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 <kb8tq@n1k.org> 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 <paul@bicknells.f2s.com> >> 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:time-nuts-bounces@febo.com] On Behalf Of Doug >> Millar >>> via time-nuts >>> Sent: 19 May 2018 05:04 >>> To: time-nuts@febo.com >>> 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 -- time-nuts@febo.com >>> 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 -- 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.