Hey there folks. I may be getting an opportunity to get a very conveniently small emission type tube tester for only $10 next week. Is this sort of thing worth having around (even to just check for shorts on used tubes) or should I wait to find some sort of transconductance measuring tester? I'd probably have to hold out on that one due to monetary constraints, being 19 and such haha. What sorts of tube testers do you guys have?