[time-nuts] CS reservoir depletion - Where to buy a tube?

paul swed paulswedb at gmail.com
Fri Jan 14 02:58:08 UTC 2011


Not lately I seem to remember $12K or 30K something crazy like that.
Somewhat out of an Amateurs budget. Though I should get the lotto any day
now.

On Thu, Jan 13, 2011 at 8:28 PM, Shawn Tayler <shawn at xmtservices.net> wrote:

>
> So,
>
> Has anyone priced a replacement for a 5061 tube lately?  I thought I saw
> upgrade kits from one of the other vendors in magazine once.  Where does
> that path take you?  Anyone?
>
>
> Shawn
>
> On Thu, 2011-01-13 at 15:02 +0100, Adrian wrote:
> > Sure it would be lots of fun making your own tube or rebuilding a bad
> one.
> >
> > This, my favorite internet video, is not exactly about caesium beam
> > tubes, but at least shows some of the required skills, as well as how
> > much fun it can be.
> >
> >
> http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech
> >
> > Adrian
> >
> >
> > Tom Van Baak schrieb:
> > >> Now that we are discussing how to restore Rb lamps.
> > >> Has anyone given any thought to refilling or refluxing the Cs in
> > >> depleted Cs tubes?
> > >
> > > Oh yes, after I ran into my first dead Cs and found the
> > > price of a replacement tube, you bet I wondered if they
> > > could be refilled. I mean, the same hp also made printers
> > > and you can refill them. What could be more natural. But
> > > a couple of events over the years dashed all my hopes.
> > >
> > > First I got my first opened Cs tube, from an 5061A that
> > > Corby had. I have no idea how you'd open one, do the
> > > brain surgery, and put it back together with the same
> > > purity and mechanical precision that it first was.
> > >
> > > Second, running out of cesium is not always the problem.
> > > Think about where the cesium goes. When a printer runs
> > > out of ink it's because it has printed tens of thousands of
> > > pages. The pages take the ink with them and the printer
> > > stays fairly clean. But where does the cesium go? It's all
> > > still inside, every single atom of it. On the walls, on the
> > > magnets, in the getter, and stuck on the dynodes of the
> > > electron multiplier. So even if you could add more Cs to
> > > the oven on one end, perhaps the harder job would be to
> > > clean up all the cesium residue that's everywhere else.
> > > It would be like adding more and more fresh oil to a car
> > > but never emptying the oil pan.
> > >
> > > Third, I got a tour of the hp factory in Santa Clara where
> > > the tubes were made. I was humbled. The clean room, the
> > > precision, the tiny EM, the vacuum stuff, the oven assembly,
> > > the one-time diaphragm that seals the oven pin hole, the
> > > wiring, the testing, the people, the decades of knowledge,
> > > the infrastructure.
> > >
> > > Instead what would be fun is for someone to try to make
> > > their own tube. Save yourself some work and re-use all the
> > > electronics of a 5061A. But make your own tube. Even
> > > re-use as many parts of an existing tube as you want. But
> > > make your own instead of trying to put Humpty Dumpty
> > > back together again.
> > >
> > > /tvb
> > >
> > >
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> >
> >
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