In a message dated 12/4/2012 6:10:36 P.M. Eastern Standard Time, docdai...@gmail.com writes:
I will build one right away.. but I didnt see your request. My problem is surface mount components (the multipin or no leads)... I am not confident in that. but I would certainly try. I am not a programmer and also figure somebody with more soldering skills than those I have picked up ruining things would be desired. I am always willing to try not to ruin something. Doc KX0O On Tue, Dec 4, 2012 at 4:25 PM, <ewkeh...@aol.com> wrote: > Paul > Frankly I do not think I will live long enough to see a time nut build a > fountain Rb. Over the four years I have watched many smoke and mirror > projects with nothing coming out of is. In German we have a saying: paper > is > patient. We should walk before we run. > Many members did buy a FE 5680, how many do you think are in operation, if, > there would be discussions about its temperature performance. take a close > look on page 7 figure 5 of the brochure, I also see it. Personally I use a > Shera loop. But that is an overkill and for some to complex since it > requires direct analog C field control. My real focus is on controlling > FRK-H, > M100 and HP 5065. > What is needed is a coordinated effort to start with temperature control, a > simple GPSDO only taking care of aging using RS232 interface an analog > loop for controlling something like a Morion. Stability and accuracy > could be > in the 1 E-12 range, low cost able to be assembled by 90% of list members, > but then I proposed it once before looking for some one to develop the > filter. No response, it is clear that very few are willing or able to > actually > build something. > When Corby wrote about his experience with the dual mixer / counter, large > response and we will have a complete documentation set, but when I asked > for a few that would be willing to build one right away, I would make > complete kits, I got one response. Sad, but that is the reality. > How many FE 5680A door stops do you think are out there? How many > PICTICII's do you think are in use? > Bert Kehren Miami. > > > In a message dated 12/4/2012 9:49:29 A.M. Eastern Standard Time, > paulsw...@gmail.com writes: > > Basements the key. So for me bigger is better. Heck if its a rack thats > ok. > It gets interesting in what types of components you can use if you are > willing to go larger. > Great point on the laser and optics. Funny thing is for small change you > can actually get used optics bench components at least at the last MIT > flea > I ran across the items. They were snapped up by the way. > From what I have seen of time-nuttery and Hydrogen masers I am actually > not > all that sure its beyond this group. > Regards > Paul > > On Tue, Dec 4, 2012 at 9:34 AM, Bob Camp <li...@rtty.us> wrote: > > > Hi > > > > Indeed, you likely won't get USNO grade with a shoe box sized part. You > can > > get one to work and do quite good ADEV. No, I haven't done it, I'm just > > going on what I've been told. The main point being that for a basement > > project - smaller is probably lower cost. > > > > Bob > > > > -----Original Message----- > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > > Behalf Of Poul-Henning Kamp > > Sent: Tuesday, December 04, 2012 9:19 AM > > To: Discussion of precise time and frequency measurement; Bill Dailey > > Subject: Re: [time-nuts] PTTI 2012, part 2 > > > > -------- > > In message > > <CAMPhiorJihW9z6-q0+Qfd+GPLjs6e8_ovWrDxQoxV=92hgj...@mail.gmail.com> > > , Bill Dailey writes: > > > > >If you look at the papers on portable rubidium fountains > > >they are significantly bigger than a shoebox (65 cm). > > > > Diameter is controlled by dispersion of the launched atoms (=recovery > rate) > > and the layers of shielding. > > > > 65cm looked like close to a minimum for USNO grade, amateurs could > probably > > make do with less shielding. > > > > -- > > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > > p...@freebsd.org | TCP/IP since RFC 956 > > FreeBSD committer | BSD since 4.3-tahoe > > Never attribute to malice what can adequately be explained by > incompetence. > > > > _______________________________________________ > > 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. > -- Doc Bill Dailey KXØO _______________________________________________ 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.