[Amps] Is This 4CX1600B Still Good?

[Dennis]

> Hello George,
>
> Safely checked and the tube is warm after three minute warm
> up.  Earlier had measured the resistance of the tube to be ~2.3 Ohms.

I'm not sure, but 2.3 ohms on a cold filament of a tube that size seems a bit high. 
I've never measured the cold resistance on a 12 volt filament transmitting tube,
(only 5 or 7 volt tubes) but it still seems a little high.  I'd try the temperature
test like the previous poster mentioned.
73,
Dennis
NØSP