[Milsurplus] identify tube

Thu, 06 Feb 2003 12:18:57 -0500

Oops. It's a 1P21. Sorry. A 1P21 is essentially a 931 selected for low dark
current.
-John

Robert G. Flory wrote:

> Hi,
> Wait a sec.... a 1P25 is an infrared image tube as used in sniperscope,
> snooperscope, not a photomultiplier.  Has a distinctive optical goesoutta
> in the center of the pins.
>
> The tube in question may indeed be a photomultiplier.  They have a very
> distinctive architecture inside.
>
> 73, Rob K2WI
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