These datasheets were astonishingly difficult to get, and then all of a sudden they were here. They've been uploaded to the main files, again with as many keywords as I can muster to help any weary and lost souls that may follow.

Main takeaways:

• It's got oil

• 2 differences between EA and EA-RR variant are just the size of the spot (at half power: 9 microns, vs. 7 microns) and then the bigger spot size can nominally heat up slightly faster, which makes sense. Spot size is dependent on power and is bigger at 8 vs. 4 watts (so there must be focusing electronics) . The replacement is the one with the slightly bigger focal spot size, EA-RR.

• Can control with either potentiometer or external voltage, which I knew, but now I know exactly how. Sensing is just voltage too. A few volts. 

• The cone of illumination is approximately 40 degrees.

• There are 2 signals: Stand-by to keep warm, and actual power. Do not turn off standby, while actual power is on! 

• "not user servicable" 

• Turn it up slowly 

• Apparently some people can detect radiation by static tingle. Do not rely on this

• It shuts off at 120 percent set power

• If it arcs, that's bad, run the warmup again but more slowly

• Not focused/constant below 20 kv

• Don't run current below 5kv

• Rated for 45 kv 180 uamps, 90 kv at 90 uamps. 

• above 70 kv is the especially careful zone. (So 60 seems like a safe middle ground)

So yeah! A lot of useful info. Still unknowns I'm curious about, like the actual contents of the tube, and especially potential servicability (maybe not in vacuum itself, but if there's arcing and it's out the tube...) 

I'm back from oklahoma (with a sore throat) so this weekend will be trying the ancient LVDS capture card that just arrived. And seeing real 2D images --- possibly distorted, but hopefully nothing too serious. Assuming I can get the camera to connect at all!