[time-nuts] Cesium Clock Avialable
Mike Feher
mfeher at eozinc.com
Sat May 19 16:02:46 UTC 2018
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 at 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 at 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 at gmail.com> k8yumdoober at 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 at n1k.org> kb8tq at 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 at bicknells.f2s.com> paul at 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 at febo.com> mailto:time-nuts-bounces at febo.com] On Behalf Of
> > > Doug
> > Millar
> > > via time-nuts
> > > Sent: 19 May 2018 05:04
> > > To: <mailto:time-nuts at febo.com> time-nuts at 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
> > > _______________________________________________
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