it is a switch - even if not of the kind you might be thinking of...

http://www.tubecollector.org/senditron.htm

                   Uwe.

JW> Hello,
JW> maybe this is  a bit off-topic but who knows :-)
JW> This is a question for all those interested in history of tubes and
JW> technology.
JW> I have a strange tube here of totally unknown use:
JW> It�s length is approx 10 cm, looks like a letter "H" with one electrode at
JW> the bottom of each leg and quite some mercury.
JW> It�s NOT a switch, there is not enough mercury in it to cover both
JW> electrodes at once in any possible position.

JW> so it must be something else...

JW> pics at

JW> http://www.wuesten.net/strange/senditron1.jpg
JW> http://www.wuesten.net/strange/senditron2.jpg

JW> What�s written on it:

JW> There is a small stamp on it saying "Senditron" ; ...wter ( disturbed, 
JW> illegible beginning of a word ending with "wter" ) and a datecode 4 /65 
JW> plus a single letter "D"

JW> nothing else.

JW> Anybody having an idea what this is, what it might be good for and 
JW> who might have made it ?

JW> It�s a nice piece in my tubecollection and I always like to know what I 
JW> collect :-)

JW> Thank you

JW> Jan

-- 
Author: Uwe Zimmermann
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