> I just bought a dozen 3l01i tubes from Yuriy and if there is anyone in this 
> group who wants to start a side discussion to share knowledge, send me a 
> private message and I will start a new google group.

I'd send you a private message, but I'm not sure how...

In any case, I'm interested.  I have a few of these CRTs (of various vintages, 
the electron gun has been redesigned over time).  I'm also curious whether the 
lifetime can be improved by changing the operating point (modifying the ratio 
of accelerating voltage versus beam current, while keeping similar brightness 
and spot size) like with magic eye tubes (detailed in the paper "Degradation of 
ZnS:Cu,Au,Al phosphor powder and thin films under prolonged electron 
bombardment").  I suspect it's not a surface layer phenomenon like in the eye 
tubes (since the phosphor is viewed from the opposite side that the electrons 
strike, and it's so thin), but it's worth a try.

- John

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