Re: [time-nuts] Cs tube pics

2016-11-03 Thread Michael Wouters
> If i were able to build a working optical clock, i would just buy > a frequency comb. The 10k€ for a comb would be cheap compared to the > money spend on the rest of the clock :-) Hmm, not sure what you're looking at, but I have a commercial erbium fibre comb in my lab and it cost 250 000 Euro.

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Magnus Danielson
Poul-Henning, On 11/02/2016 11:02 AM, Poul-Henning Kamp wrote: In message <20161102104103.0c58d35a72b7b36253b3d...@kinali.ch>, Attila Kinali writes: I still would like to try to build my own atomic clock at some point, even if it would be a quite costly, and a many years project.

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Attila Kinali
On Thu, 3 Nov 2016 07:42:13 +1100 Michael Wouters wrote: > One other vital component is the flywheel oscillator you need to take > advantage of the fabulous stability you now have at hand.We had a cryogenic > sapphire oscillator for our (microwave) clock. Yes, a lot

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Michael Wouters
I worked on a trapped ion frequency standard 20 years ago, a 12.6Ghz Yb clock. It's still in the lab across from me and looking at it, and the electronics, I think it is the sort of thing that a physicist might contemplate building in his/her garage but ... Building it took about 10 man years of

Re: [time-nuts] Cs tube pics

2016-11-02 Thread paul swed
​A comment to the thread. Desired a C, obtained a C. Discovered they take care, feeding and power. Mine is after all a rag-tag C. So thats why they run them on UPS systems Anyhow happy that I have one and learned so much. But for a large group of time-nuts GPSDO may simply be good enough. No

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Attila Kinali
On Wed, 02 Nov 2016 10:02:53 + "Poul-Henning Kamp" wrote: > In message <20161102104103.0c58d35a72b7b36253b3d...@kinali.ch>, Attila Kinali > writes: > > >I still would like to try to build my own atomic clock at some point, > >even if it would be a quite costly, and a

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Poul-Henning Kamp
In message <20161102104103.0c58d35a72b7b36253b3d...@kinali.ch>, Attila Kinali writes: >I still would like to try to build my own atomic clock at some point, >even if it would be a quite costly, and a many years project. If you like lasers, build an ion trap. If you only like lasers a

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Attila Kinali
On Tue, 1 Nov 2016 09:10:25 -0700 "Tom Van Baak" wrote: > > I really would like to do that. But they are a tad bit expensive. > > Especially on this side of the big pond. If anyone is willing > > to part with a Cs standard and want to have it a good home, feel > > free to

Re: [time-nuts] Cs tube pics

2016-11-02 Thread Poul-Henning Kamp
In message , Clint Jay wr ites: >While I've no need for such accuracy in my little home workshop, I >*really* would like a Cs standard, just because. > >The Rb and GPSDO are more than adequate for my needs but I can

Re: [time-nuts] Cs tube pics

2016-11-01 Thread Tom Van Baak
Clint: > While I've no need for such accuracy in my little home workshop, I > *really* would like a Cs standard, just because. > > The Rb and GPSDO are more than adequate for my needs but I can understand > (and, for now, manage to resist) the addiction to accuracy and find it > fascinating

Re: [time-nuts] Cs tube pics

2016-11-01 Thread Clint Jay
While I've no need for such accuracy in my little home workshop, I *really* would like a Cs standard, just because. The Rb and GPSDO are more than adequate for my needs but I can understand (and, for now, manage to resist) the addiction to accuracy and find it fascinating that such results can

Re: [time-nuts] Cs tube pics

2016-11-01 Thread Bert Kehren via time-nuts
Has any one opened a FTS tube it is smaller than the new HP tube, would be nice. If not I will gladly make one available for the cost of shipping. Bert Kehren In a message dated 11/1/2016 1:19:16 A.M. Eastern Daylight Time, t...@leapsecond.com writes: > Thanks for the other good links as

Re: [time-nuts] Cs tube pics

2016-11-01 Thread jimlux
On 10/31/16 10:18 PM, Tom Van Baak wrote: When you're all done you'll realize just how amazing it is that an entire atomic physics laboratory can be reduced to the size of a 2L water bottle, with a 68000 CPU playing the role of the grad student. It can run 24x7 for 10 to 20 years and remain

Re: [time-nuts] Cs tube pics

2016-11-01 Thread Richard (Rick) Karlquist
On 10/31/2016 10:18 PM, Tom Van Baak wrote: So if you keep hacking on your tube(s) you should get to the same point as they did. If nothing else, you can use my photos of hp's display as a hint of where and where not to cut! Note that the shinny copper will look fantastic at first but may

Re: [time-nuts] Cs tube pics

2016-11-01 Thread Attila Kinali
On Mon, 31 Oct 2016 22:18:07 -0700 "Tom Van Baak" wrote: > That's why everyone should own a cesium standard after they grow tired of > playing with GPSDO. I really would like to do that. But they are a tad bit expensive. Especially on this side of the big pond. If anyone

Re: [time-nuts] Cs tube pics

2016-10-31 Thread Tom Van Baak
> Thanks for the other good links as well. Your pictures at HP are archived > in Google somewhere, as I ran across at least one in my preliminary > research. Hi Skip, Ah, now I know what you mean. Around 2005 I took a set of cesium beam tube photos within the semi-public viewing area at

[time-nuts] Cs tube pics

2016-10-31 Thread Skip Withrow
Hello Nuts, Yes, I originally had the wrong dash in the link names and did fix it almost immediately. That is why they now work. (Should have put pictures with both names in the folder so they would have worked for all) Tom, really like your third link that has the cover over the microwave