Identifying TO-3 w/HP house numbering

[Curious Marc]

Can't find it either in any of the X-ref lists I have. As you know already, 1854 are usually NPN transistors, but around these numbers I see mostly Darlingtons in my collection. So maybe that's what you have, and why the junctions would test weird.
Marc

> On Oct 15, 2018, at 10:21 PM, Josh Dersch via cctalk <cctalk at classiccmp.org> wrote:
> 
> Hey all --
> 
> Got an HP 2382A terminal I'm attempting to resurrect.  I get no video, no
> heater, no high voltage.  What I believe to be the horizontal output
> transistor appears to be bad, but I'm not sure if this thing contains
> internal diodes that might be throwing off my testing attempts.  It's
> labeled "1854-0900."  Anyone know what this actually is?  (Anyone have a
> service manual for this terminal?)
> 
> Thanks,
> Josh