RGB and Composite video to an Atari 2600.

I added RGB and Composite video via a SNES/N64 AV port to an Atari 2600.

Finished picture fist. This is with the Composite cable plugged in. The power cable is nicely located directly above, for nice symmetry on the back. Here is more info on the mod I'm installing : etim.net.au/2600rgb/
Back side. You can see the pallete switch to the left of the AV port. I have 3 palletes to choose from.
Then of course, the AV port. Has RGB, Composite, and stereo audio. I believe its actually just mono split into two. But nice that it works for the cable.
First you gotta remove the RF Modulator.
Then install the RGB Board. The TIA ("GPU") is already socketed to the board, meaning you don't have to desolder the chip from the board. Making it MUCH easier than the NES RGB mod. A little easy soldering to get the board ready, and its good to go.
Cut holes in the metal shielding to allow the cables to run out
testing her out
Filing the housing. Started with a dremel and finished it off with a small file set.
Test fitting everything
Composite works for the big screen
And that sweet sweet RGB for my PVM. Cheers!
Source : bentika from Reddit