I found this and several more, inside a old ocilloscope, I found the data sheet on it.
6.6 v, pins 7, 8, are the heater pins, but when i put power on it, i do not get a glow. are pins 7 and 8 where i put one + or - connection and somewhere else the power completes the circut. It is my first time messing with a vacuum tube.
tested with my meter, and it chrips away to tell me there is connection. i have even visually inspected under my 10x magnifyer, and there are no broken connections.
what am i doing wrong? why will it not glow? its for a prop project for my brother.