NOH-3 nightivision sight repair help

[schwirrwarr]

i will later add pics.

ok, so some time ago i saw this sich nightvision scope for sale, for only 40$! i bought it, put 2 aa batteries in it and startet it up...
slowly a green image was forming, but then i hear a loud pop, the image goes instantly dark and it starts up again, makes a popping sound and so on..

then i decidet to take it apart, and see what the problem was. i opened it, mad the room dark, pressed the button, whilst wearing rubber gloves and a big arc flies from the transformer to the tube housing!!

next step was to take the thing completely dissasemble the scope, because the reticle also wouldnt show up.

i didnt find any plans or even drawings of this scope online, so it was quite a hastle to dissasemble it, but i had done it and i now had access to all the components of the scope, which was nice , but confusing, because this was my first time dissamsembling something like this.

first i screwed the led that lights up the reticle out and viola, it was working fine when i connected a battery to it, but it didnt work when i was poweering the scope up, so something in the circutry was broken.

it was the variable resistor!
i ordered it and soldered it on to the cables, but the led still youldnt light up, so i looked at the resistors and it seems that some resistors were faulty, so i ordered them today and they will arrive in some days i hope.


back to the tube..


the tube in this scope was a ekran v8 ep33 :

https://www.google.com/url?sa=i&url=https%3A%2F%2Fpicclick.co.uk%2FPhotocathode-Image-intensifier-tube-V-8-EP33-night-vision-293286073012.html&psig=AOvVaw2BJE3K3bJwHORLhplmVWg3&ust=1596140533442000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCNDkv_qk8-oCFQAAAAAdAAAAABBB

this tube was connected to a little but powerfull high voltage transformer, which , when powered up outside of the scope and with nothing to release the arc on, was making static noise, like when you switch an old crt off. 

i think i just have to insulate the trandformer a bit more and i would then be abe to use it completely normal.

what do you think??  

the tube also has one small black spot, u think i should replace it?

sorry for possible spelling mistakes, my english isnt so good.