how do i activate the Euclids C finder gun. i just picked it off the kid while he was sleeping but i hear i have to activate it an how do i get ammo?? let me no thanks

The Helios Quest, That Lucky Old Sun. Link if you want it, but it contains spoilers. http://fallout.wikia.com/wiki/That_Lucky_Old_Sun

If you don't want to look at that, then just go to the Power Plant, talk to the NCR Guard lady person, find Fantastic and talk to him, then find the other scientist, Ivan, or something, then do the quest.

Where do i find Power Plant ? Name Fantastic Google cant find in FalloutNV , so i need also ammo for EuclidsC finder, i pay the boy for it, but have done The Lucky Old Sun before,and Dont get the ammo.

When you were doing the Lucky Old Sun quest, what did you power? You have to power ARCHIMEDES II, then when you get the Euclid's C-Finder, it gives you one shot per day, as the laser in orbit needs time to charge.

Unless you use the exploit where the kid respawns a gun every few days. I've got 11....and 100 charges. I wonder if I RPP a charge or two on the kid if he'll fire it.

It sticks out like a sore thumb. If you at Novac and you see a tall tower. That is the power plant. Fantastic is in the power plant. You don't get ammo for the range finder. Its a range finder not the weapon itself. The weapon itself is up in the sky. When that weapons recharges itself you get a 1 at the range finder and you can use it. It takes a lllllllllllllllllllooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnggggggggggggggggggggggggggggggg time to recharge. It dose work. That Deathcrawl dose not know what him.

Try http://fallout.wikia.com/wiki/Fallout_Wiki it will help.