General > General Technical Chat

Massive old vacuum tube, anyone know what it is?

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macona:
Couple pics of the base. The base has spacers to keep it centered in a chimney or something probably to keep air flowing over the end.

Untitled by Jerry Biehler, on Flickr

Untitled by Jerry Biehler, on Flickr

Cyberdragon:
Be mindful that removing the wax may cause a leak if the tube has not already vented.

I don't think those bottom spacers are for a chimney, think they are just clips for mounting into the device in general, along with the weird ring around the middle which is also a contact.

You say the anode is hollow? Show us down the end of the anode, I have a bit of a theory.

macona:
Im not touching it. Its not worth it.

Pic down the "anode" it goes almost all the way to the other end. My guess there was a pipe pumping water down the center of it to keep it cool.

Untitled by Jerry Biehler, on Flickr

Bud:
Guess Glasslinger ftom Youtube would know.

Cyberdragon:
I don't think that's for water cooling, a single pipe does not allow circulation, unless there was a coil/loop of smaller pipe inside a sleeve.

My theory is the anode is an emittor/beam former, either for RF or possibly even x-rays. A grounded cooling jacket was likely connected to the ring, the HV negative connected by screw terminal to the sideways stud on the base, and a ring clip connected to the anode for HV +. The bottom of that cavity would be a transparent window for RF/x-ray (yes, there are end firing x-ray tubes, but I have only found diagrams not photos, but basically they seem to use reflected/deflected electrons). Certain x-ray tubes also have odd appendages like that with other electrodes inside (not sure what for).

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