Trying to get the best video quality with my consoles (and other problems)

[APE992]

The small TV is getting annoying. It's not as good as the 50" one. I'm thinking that an RF to composite converter might make the Intellivision work better. Would it? Also, would an S-video to composite converter keep the video at S-video quality?

Nope. It'll look worse than it did on the smaller TV. Every time you convert a signal the quality degrades.

The only thing you can do with the Intellvision is to get an composite video mod done so you can use it without an adapter on the 50" screen.

Alternatively:
http://gamesx.com/wiki/doku.php?id=av:intellivision_pal

This might be useful on a NTSC console. There is a schematic for RGB output which you could then use with an upscaler to use component video with. Wouldn't look half bad.