Marion.Bates(a)Dartmouth.EDU (Marion Bates) wrote: The C64 provides composite video, luminance, chrominance and audio on its DIN connector. The luminance and chrominance signals are what is nowadays known as S-video or Y/C. The luminance is the brightness information (i.e., a monochrome video signal), the chrominance is the colour information. By having the two signals on separate wires rather than mixing them, picture quality is improved over composite video. Many modern TVs have S-video inputs; a 4-pin mini-DIN socket is used for this. Commodore monitors use two phono sockets, marked L and C. It sounds like you are using a cable designed for connecting a C64 to a Commodore monitor. This will not directly work with your TV's composite video input. As you have found, the best you can do is to get a monochrome picture by connecting the luminance signal. To get the best possible picture quality, buy a lead that has two phono sockets on one end, and an S-video 4-pin mini-DIN connector on the other. You would connect this to the L and C jacks of your C64 video lead, and the S-video port on your TV. However, you may have trouble finding a ready-made lead like this; perhaps building one yourself will be quicker. If your TV does not have an S-video input, you'll need to get another lead that uses the C64's composite video output instead. An A/V lead for the Sega Mega Drive/Genesis 1 console *may* work. I think you mean using the RF output and a TV signal switch (as supplied with most game consoles), not a modulator. -- Mark