The insides of a B5092A...

[Paul Andrews]

Here is a picture of the contents of a B5092A. This tube was broken when it arrived, and got more broken when I decided to see how stiff the socket I have for these things was (answer: Pretty stiff!). I figure some of you might be concerned about any residual radioactivity so I checked. Naturally nothing above background. As for any mercury vapor, I figured that it too would be long gone. You can see that there is an extra figure 8 - this was connected to the anode, so it is an extra anode. I didn't know these tubes had one of those. You can also see the little mercury pill. It's wires were connected to the two pins marked 'internal connection' on the data sheets. So now I know what those are for! Also the nine is clearly an upside down six (the shape is the same, as are the connections) - so the Russians weren't the only people saving money by re-using figures.

[gregebert]

Never knew about the extra '8'.....where was it located in the vertical stack ?

[Paul Andrews]

Roughly in the middle.

On Apr 30, 2017, at 1:36 PM, gregebert <greg...@hotmail.com> wrote:

Never knew about the extra '8'.....where was it located in the vertical stack ?

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[Paul Andrews]

Between the 5th and 6th white insulator disks starting from the top. On mine you can see a lead going from that to the grey metal support.