I've been thinking that if chroma and luma are taken directly from the vic, it would be possible to remove the rf modulator and this would give the best possible untouched video signal. I tried this and got no picture at all, and after a bit of research, it seems the modulator is used for other video/audio items and not just rf.

With the correct circuit, I think we could adjust the levels from the vic and bypass the modulator. However I'm stumped now, has any one done what I describe?

I've soldered the rf modulator back in now and the 64 is working again, but it's bugging me as I'm sure this should be possible! Any thoughts or advise on this anyone?

Tia

Check this: http://www.bigmech.com/misc/c64mods/svideo.html
just keep in mind that composite looks better on many tv's and monitors anyway.
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The German site looks like a good place to start - thanks. Have you done this? I would like to due to not having and CRT tv's for a long while now as due to limited space I have to make do with the LCD we have!

My point was that composite looks better on many LCD TV's, it various from tv to tv and from c64 to c64. Some got horrible s-video some very good. I had s-video cable before and picture was very sharp but has this checkerboard pattern. Recently I bought very good quality (old stock not home made) composite cable for c64 on ebay and picture is outstanding.
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I undertand what you're saying. But with adjustment it must be possible to have excellent svideo which by nature would be better than composite. I'm starting to think the modulator maybe causing issues and if the correct circuit is made, the modulator can be removed leaving untouched svideo. I've removed the modulator but only realised after removal it also does processing for the chroma and luma out. I'm stuck at a hurdle now

In the link I provided everything is explained
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Again it says in that page i linked that

Quote:

I really hate this ugly little RF box. Unfortunately, it houses circuitry necessary for video luminance and chrominance output. It occupies the area I plan to use for the serial and S-Video outputs. Therefore, it needs to be relocated

So you can't just remove rf box
Anyway, here is my setup over s-video and composite:



on the close up you can see that s-video is indeed sharper but composite is warmer and pixels are rounded almost like tv is upscalig, there is no pattern and games looks better over composite in my opinion. I preffer S-video when using GEOS.



My other c64 from 1991 has absolute horrible s-video.
Anyway it's c64 so you wont get HD no metter what you do.
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c64midi.com
total-kontrol.webs.com

It seems a lot of graphics are made for a RF or composite connection to a CRT screen, where colors would blend a little.

Looked through the thread on Forum64.de, looks like this was the last example, there was some circuit to remove/soften the vertical stripes as well, seems like it does that as well. Looks like it intends to remove everything that obstructs the picture by sending it back into the video signal inverted.