Re: [time-nuts] Rubidium Cells for Sale ?!

On Tue, 7 May 2019 11:36:55 -0400 Bob kb8tq wrote: > Before we start hearing “well, noting ever breaks these days” …. how is the > Galileo system doing for frequency standard reliability ? :) The PHM seem to suffer from an inherent problem in space. I had the chance to talk to some of the

Re: [time-nuts] Rubidium Cells for Sale ?!

On Tue, May 07, 2019 at 11:37:46AM -0400, William H. Fite wrote: > And it drives SpaceX nuts. Likely the other privates, as well. SpaceX > recovers a faulty part or system, analyzes the problem, resolves it, tests > the revision, and is ready to go. "No no," says NASA. "First we must have a >

Re: [time-nuts] Rubidium Cells for Sale ?!

On 5/7/19 2:16 PM, Bob kb8tq wrote: Hi Well, given the price, running it in a thermal-vac chamber would not significantly increase the charges to your credit card :) But perhaps Poul-Henning was thinking about the gravitational force. So you could buy two, and drop them alternately down a

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi Well, given the price, running it in a thermal-vac chamber would not significantly increase the charges to your credit card :) Bob > On May 7, 2019, at 3:23 PM, Poul-Henning Kamp wrote: > > > In message , Bob kb8tq writes: > >> In terms of “I don’t want one” …. well, they are

Re: [time-nuts] Rubidium Cells for Sale ?!

In message , Bob kb8tq writes: >In terms of “I don’t want one” …. well, they are pretty much the best Rb ever >made anywhere / ever. They are as close as you will get to a maser and >not *be* a maser. Rumours has it that the design is optimized for space use and therefore not quite as

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi It was EG Frequency Products back when I worked for them (not in Salem, but still the same division). They then bought Perkin Elmer and changed the name. Now they seem to be somebody else ..,.,. === You can go into whatever loops you care to about the way space products are done. The

Re: [time-nuts] Rubidium Cells for Sale ?!

And it drives SpaceX nuts. Likely the other privates, as well. SpaceX recovers a faulty part or system, analyzes the problem, resolves it, tests the revision, and is ready to go. "No no," says NASA. "First we must have a workgroup to define the problem. Then we must have a workgroup to identify

Re: [time-nuts] Rubidium Cells for Sale ?!

On 2019-05-07 10:00 AM, Bruce Griffiths wrote: As expected the seller doesn't know, but offered 2 cells for the price of one if further info on the cells he's offering can be provided. Determining the cell filling would likely be somewhat interesting/challenging. Absorption spectroscopy

Re: [time-nuts] Rubidium Cells for Sale ?!

uts@lists.febo.com Subject: Re: [time-nuts] Rubidium Cells for Sale ?! On 5/6/19 3:54 PM, Bob kb8tq wrote: > Hi > > Back a while ago it was in the “over a million dollars” range. Like anything > that > is designed for space use, the price is meaningless until you sort through > wha

Re: [time-nuts] Rubidium Cells for Sale ?!

On 5/6/19 7:04 PM, William H. Fite wrote: Mother of God, really? I had a friend, now of blessed memory, who was lead communications engineer for Grumman on the lunar lander. He used to boggle our minds with stories of the truly absurd lengths that NASA made them go to have hardware "space

Re: [time-nuts] Rubidium Cells for Sale ?!

On 5/6/19 3:54 PM, Bob kb8tq wrote: Hi Back a while ago it was in the “over a million dollars” range. Like anything that is designed for space use, the price is meaningless until you sort through what kind of paperwork this or that program requires. Yeah, this one: Radiation Hardened to

Re: [time-nuts] Rubidium Cells for Sale ?!

Mother of God, really? I had a friend, now of blessed memory, who was lead communications engineer for Grumman on the lunar lander. He used to boggle our minds with stories of the truly absurd lengths that NASA made them go to have hardware "space certified." On Monday, May 6, 2019, Bob kb8tq

Re: [time-nuts] Rubidium Cells for Sale ?!

On 5/6/19 5:34 PM, William H. Fite wrote: I suppose that shouldn't surprise me but, since I have neither ITAR credentials nor a metric shit load of money, it's a good thing that I don't want one. Category XV— Spacecraft and Related Articles (e) Spacecraft parts, components, accessories,

Re: [time-nuts] Rubidium Cells for Sale ?!

In message , "William H. Fite" writes: > Anyone know the price of the Excelitas device? No, I'm not interested in > purchasing one, just curious. I assume it is hair-curling expensive. In addition to a metric shit-load of money, you also need an ITAR approval before they will sell you

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi Back a while ago it was in the “over a million dollars” range. Like anything that is designed for space use, the price is meaningless until you sort through what kind of paperwork this or that program requires. Bob > On May 6, 2019, at 5:37 PM, William H. Fite wrote: > > Anyone know the

Re: [time-nuts] Rubidium Cells for Sale ?!

I suppose that shouldn't surprise me but, since I have neither ITAR credentials nor a metric shit load of money, it's a good thing that I don't want one. On Monday, May 6, 2019, Poul-Henning Kamp wrote: > > In message < >

Re: [time-nuts] Rubidium Cells for Sale ?!

Anyone know the price of the Excelitas device? No, I'm not interested in purchasing one, just curious. I assume it is hair-curling expensive. On Monday, May 6, 2019, Bob kb8tq wrote: > Hi > > Ummm ….. e ….. the Efratom Rb’s use an integrated lamp plus one cell. > >

Re: [time-nuts] Rubidium Cells for Sale ?!

As expected the seller doesn't know, but offered 2 cells for the price of one if further info on the cells he's offering can be provided. Determining the cell filling would likely be somewhat interesting/challenging. Absorption spectroscopy using a tunable ECDL comes to mind to sort out the

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi Ummm ….. e ….. the Efratom Rb’s use an integrated lamp plus one cell. http://www.wriley.com/A%20Modern%20MIL%20Rubidium%20Frequency%20Standard.pdf There still are a lot of people doing the lamp plus two

Re: [time-nuts] Rubidium Cells for Sale ?!

On 2019-05-06 10:00 AM, Bob kb8tq wrote: Hi I?m sure they are good cells. The gotcha is ?which one is it??. A normal Rb has multiple cells doing different things. You ? umm? errr ? need a set of cells ?. Why do you think I posed the question "Anybody feeling lucky (or desperate!)?"?

Re: [time-nuts] Rubidium Cells for Sale ?!

I asked the seller which cell. We'll see what the response is. If its filled with RB87 and buffer gas it may be usable with a suitably tuned ECDL locked to the correct line. Bruce > On 06 May 2019 at 14:04 Bob kb8tq wrote: > > > Hi > > I’m sure they are good cells. The gotcha is “which one is

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi I’m sure they are good cells. The gotcha is “which one is it?”. A normal Rb has multiple cells doing different things. You … umm… errr … need a set of cells …. Bob > On May 5, 2019, at 5:32 PM, ed_pal...@sasktel.net wrote: > > I've seen lots of weird stuff on ebay, but I never thought I'd

Re: [time-nuts] Rubidium Cells for Sale ?!

Hi How would you put it into operation / use it Regards Paul -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of ed_pal...@sasktel.net Sent: 05 May 2019 22:33 To: time-nuts@lists.febo.com Subject: [time-nuts] Rubidium Cells for Sale ?! I've seen

[time-nuts] Rubidium Cells for Sale ?!

I've seen lots of weird stuff on ebay, but I never thought I'd see this! https://www.ebay.com/itm/123737315177 Anybody feeling lucky (or desperate!)? I have no connection with the seller. Ed ___ time-nuts mailing list -- time-nuts@lists.febo.com