Where is the Lincoln's Repeater located on Fallout 3?

Here is a step by step of how to locate the Lincoln repeater:

1. Go inside the museum of history.

2. Once you enter inside the museum go STRAIGHT, stop in the center and you notice wing of the museum that have debris blocking them execpt one. (that may sound a little crazy but that is how it can be found when someone is rushing to get it done) The Lincoln wing.

3. Go inside... BE WARNED there are feral ghouls (all in the room) inside and a turret on the top floor.

4. You will find a device called Lincoln's Voice. On the top floor in the room straight across from the stairs.

5. You will see a door. Enter through the door.

6. BE WARNED there are MORE ghouls and you will hear random shooting. There will be a raider inside near the repeater. My advice is follow the sound.. It may sound crazy but that is how I found the repeater because when I found it I had followers.

P.S. if you are going to find the repeater get followers so you don't get ambused by the ghouls.