X-2: Strange Transmissions!

X-2: Strange Transmissions! is a side quest in the Fallout: New Vegas add-on Old World Blues.

Detailed walkthrough
When the Courier is first allowed out of the Think Tank and the Sink, the Courier will be tasked with retrieving three pieces of technology, and the coil from the X-2 facility is the easiest one to do. When the character enters the X-2 facility, there will be minimal opposition: three protectrons. These three are spread out at various levels of the tower.

After defeating the protectrons, climb the ladder to the top of the tower and use the support arms of the transmitter to reach the X-2 antenna at the top. After grabbing it, the player will hear the scientists start to bicker again and Mobius will announce that the transmitter station has been overrun by his robo-scorpions. With the Courier's new shiny coil, head back down into the facility.