[time-nuts] So what's inside that Cs beam tube anyway?

[Skip Withrow]

Hello time-nuts,
Five or six years ago I cut open one of the original HP cesium beam tubes
and posted some pictures.  I presume they are floating around the net
somewhere still.

So, I have repeated the exercise with one of the newer (smaller) tubes, and
thought I would share the results.  Attached are a half dozen photos,
several are annotated to get the lay of the land.  I have higher resolution
non-annotated versions if anyone has a desire.

Some observations are:
1.  There are four nice holes that can be used to mount the cut open unit
above a base using screws or standoffs.  And from the scratches appears to
be how HP mounted the innards during assembly.
2.  After these pictures were taken I cut a window in the mu metal shield
hoping to expose the microwave waveguide.  What did I find - another mu
metal shield, argh.  It's too tight to get my Dremel tool in there to cut
through the second one.

I have four (4) of these tubes and three (3) of the older style tubes that
are excess to my needs.  If anyone wants one I'm willing to ship, but they
are heavy (about 20 pounds).  The leads are cut off these tubes - they are
dead.  I would anticipate shipping would be about $35-$40 to the lower 48.
Please contact me off-list if interested.

Regards,
Skip Withrow
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