Need help to ID this Tube

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k5ygc:
Rectifier but what number?  Mark K5YGC

W8ACR:
How many pins at the base? and can you show a pic looking down from the top?
My guess at this time is either an 80 or an 83.

k5ygc:
Eight pin I have a 83 here looks nothing like it. I have search the web no luck finding one with the piece around the bottom o the plates. Pic of top attached.

W8ACR:
Does the octal base have all eight pins present? Most common rectifiers only have five pins on the octal base. I don't recall seeing an internal structure like the one shown, but it may just be a variant of a common number.

W8KHZ:
One trick I learned on tubes with the markings rubbed off... shine a really bright LED flashlight on the glass envelope. Often markings that are not visible in the ambient light are readily visible under the intense light of the LEDs.  Give it a try you might get lucky!

Brian  W8KHZ

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