the previous owner said, it belonged to his grandpa, and when he tried turning it on, it just shuts off and then starts up again. when it arrived , i tried it, and it did exactly, what he explained to me, but i heared an arcing noise inside, so i opened the thing and turned it on, inside of the scope, a spark then flied from the transformer to the tube. i insulate the transformer and start it again. the arcing noise is now gone, but it still shuts itself off, and instead of arcing, i hear a crackling noise, like when you turn off a crt. well, so now im thinking im stuck there, but i tinker arround with it some more, and i notice, that the brightness adjuster on the scope is turnung freely, so i take that out and i am now thinking, that the adjuster was broken and was letting too much current trough. and thats where i need your help. i already ordered a new adjuster and all, but i would like to know, if anyone also owns this scope, or has done some troubleshooting on it. also, when i powered the scope up, the reticle didnt show up , and i dont know if it would, if i get this thing to work.