I just came on to ask a question very similar to this. The difference in my case is that I have never done any kind of electronic work in my life so there's no way I'm going to try soldering anything on my only working C64. So what are the alternatives?
Mine has Serial, Video and RF ports. Can I use one of these and seperate the video and audio signals?
Mines a PAL C64 by the way, if that makes any difference to the available outputs.