This might interest someone.
http://cgi.ebay.com/HP-Cesium-Beam-Tube-Hewlett-Packard-1924A-02909-0581_W0QQitemZ7543746172QQcategoryZ25399QQrdZ1QQcmdZViewItem
The description of how it was obtained is interesting.
"I got this from a scrap yard. The folks there save vacuum tubes for me and when they saw "tube" on
this they pulled it out of the test set. I don't see any cut wires so it looks like they unhooked it.
It is about 15 by 5 1/2 inches. "
I'd hate to guess the value of the item they destroyed to pull the "tube" for
him!!
--
Dr. David Kirkby PhD CEng MIEE,
Senior Research Fellow,
Department of Medical Physics,
Mallet Place Engineering Building,
Gower St,
University College London,
London WC1E 6BT.
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