Modifying an Atari 2600 for composite audio / video output.
This is my first time doing this mod or working on an Atari however it was extremely easy.
The guides I used:
http://www.instructables.com/id/ATARI-2600-Video-Composite-mod/
http://www.coolretroprojects.com/Atari_2600_AV_Mod_Installation_Guide.pdf
If you have any questions, please feel free to ask in the comments.