You mean I can't just drill a hole in, wash out the old cesium with some tap
water ;-), toss in some new cesium, suck out the air, bung a cork in the
hole, and call it a day? Drat! foiled again...
---
> Because it's not that easy. We are talking about a high vacuum system here.
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 that
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 b
On 10/30/2016 10:18 PM, Bill Hawkins wrote:
Think of the fun you'll have determining the heat flow model constants
for the system. In particular, there's no air flow sensor because they
are expensive. You'll need to determine the relation between fan speed
and air flow.
You can buy an automotive
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
In message <20161101115121.998d1e1b073c5a9d1658b...@kinali.ch>, Attila Kinali
writes:
>It would be possible to make the tube such that you could change the
>"consumables".
Wasn't PTB's long Cs advertised on them being able to replenish the
Cs reservoir while it was running ?
--
Poul-
Hi
Quite literally 10’s of millions of dollars (back in the good old days) was
put into the idea of a rebuildable Cs tube or rebuilding ones that already
exist. The result was more people in the tube business for a while. They
never did come up with a rebuildable tube or a salvage process. Since t
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
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 d
I remember when they made tubes in Santa Clara, they
would assemble them and do some tests without breaking
the Cs ampule. A fair percentage would fail and would
go to a machinist using a big lathe to cut
them open to be rebuilt. It was very important that
the Cs had not been released yet.
Rick
On Mon, 31 Oct 2016 14:50:51 -0700
ed breya wrote:
> It's a shame that they're not built in such a way that just the wear-out
> parts could be replaced, and not wasting all the rest of the design and
> craftsmanship that's probably just fine.
Because it's not that easy. We are talking about a
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 is willing
to part with
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