Atari Video Mods

 Eric Williams | 26 March, 2019

This is a list of mods for the Atari 5200 and 2600 that give you S-Video and/or composite video out.

Because I keep finding them and losing them.

Atari 5200

CD4050 + Transistor mod:

Good-looking mod that I'm breadboarding at the moment, just to see if it fixes some of the issues with the two-transistor mod that I'm currently using.

Transistor + CD4050

Single-transistor mod

Pretty basic mod, though it eats up a lot of soldering tin. And time.

I get buzzing on the audio with this one, and the colors aren't very stable.

There is lots of noise and bleeding to be dealt with on the picture. This is almost certainly due to my poor implementation of the mod and use of low- quality parts.

Atari 2600

Two-transistor mod

This mod blew me away. It was a pain in the ass to solder together, being as it was for an Atari 2600 Jr. PAL (UK) model. I couldn't really find any pictures online of the tapping points for the Chroma, Luma, etc. I'll post some here.

Colors look great, audio is squeaky clean. All in all, definitely happy with how this one turned out.

The S-Video jack fits perfectly into the RF jack socket. I opted to install a 3.5 mm stereo jack instead of RCA to save space and keep drilling down to a minimum.

In the future, I'll see about wiring up a composite jack, just for completeness. The composite wire could be passed through the Color / BW switch (although this is sometimes used in games; maybe not a good idea). Another possibility would be to just add a dp/st switch to the case, or finally track down a video driver IC that separates out CVBS from Y/C.