This is a question not an answer unfortunately. The GameCube doesn't output RGB on NTSC models but instead S-Video. The PAL models output RGB but not S-Video. The only way to get RGB from a NTSC model I've seen involves buying the really expensive DV Component cable and hacking it up. But it seems to me that if the PAL GameCube has RGB on the AV connector, shouldn't you be able to open your GC, trace the connections to the NTSC Encoder and use wires to wire up RGB to the AV connector? Has anyone tried this or heard of this idea? It just seems silly to me to have to spend 70 bucks on the component cable and hack it up for RGB or just use it as is when I don't see why soldering 3 wires wouldn't do the same thing that is needed to get RGB from the N64. This is fairly important for me since my LCD HDTV so nicely doesn't support S-Video and running N64 or GC on composite on it is terrible.
If 480i is acceptable... theres always this solution Although I haven't tried it so I don't know how well it will work. I would love to hear any other solutions though for a component cable ( Although really if you NEED component get a Wii as you can play your GC games via Wii's component and its cheaper in the long run )
But you don't understand, North American GameCube and Japanese Gamecube (NTSC) do not output RGB on their AV connectors. The pins don't go anywhere, or atleast I've read this. If the signals all make it to the AV connector I already have a cable to work with it. To be honest I never tried using the RGB cable with my NTSC Gamecube cause everywhere says it won't work. What I'm asking about is assuming the pins don't connect anywhere on NTSC unit. Could I just open it up and solder wires to solder the Video Encoder chip's RGB inputs to the AV port similar to the N64 RGB mod? And I'm hoping to find out someone here knows if it can be done or not. Edit: I tried it and it doesn't work. RGB is not connected to the AV port on my NTSC Gamecube. So the original question still stands. Can you find a video encoder in the GC and tap the RGB inputs to wire to the AV port for RGB? It certainly would be easier and cheaper for me than the alternatives which are importing a PAL Gamecube or buying that over priced Component Cable.
It maybe would more simple for you to buy a PAL Gamecube ? Problem : some NTSC games are a little buggy on this one. I can provide a PAL one for cheap. Video encoder is a slightly diferent in PAL GC. Like VDC \ DENC dac chip in N64.
How cheap would this PAL GC be just out of curiosity? Also on that subject would it be likely for my Action Replay disc to work on a PAL unit or would I have to get a PAL AR or modchip it to play my NTSC games?
Indeed, I don't think it will cost too much to import the unit on its own (to the USA). I'm sure someone will offer you one, or put a request in the WTB section if you want to avoid eBay. I have one of those RGB SCART converted DV Component cables. It came with my second-hand Panasonic Q. There's a composite A/V block fitted on the cable as well, making it possible to watch DVD's without having to switching A/V modes.