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Old 07-10-2018, 12:17 AM
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SuperCaviTationIstic SuperCaviTationIstic is offline
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Join Date: Jan 2010
Posts: 339
It has arrived!

So there is a heater filament in the very center. This is surrounded by the high voltage anode wire screen. Outside that is the secondary anode wire screen, and finally the cathode on the outside, made of some type of thin foil....silver?

Filament is just under an ohm cold.

There's a getter that's been burnt up connected to the cathode which looks normal.

The cathode has evidence of heat discoloration towards the bottom and the foil is peeling up a tiny bit here and there. On some of the cathode supports there is evidence of partial melting, but it's not destroyed.

The secondary anode adjacent to the cathode has a couple segments of wire blown away near the bottom, which have stuck to the glass envelope.

Looks like maybe there was arcing between anode and cathode.

The supports for the elements have shifted off axis slightly. I don't know how critical this is to operation. Nothing is shorted out and the filament isn't burnt out so hopefully it still functions to some extent.
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