S-video out to Co-Ax tv?

[OtisCampbell]

My pc has S-Video out, my TV only has CO-AX input.

I already tried SVid --> Modulator --> Co-Ax cable --> TV.

The picture showed on TV, but in black & white.

Is there a way to do this with an older TV with only CoAx input?

[Blanka]

The modulator needs a composite signal. Doesn't the PC output that too (yellow plug)?
Black and white means that the chroma part is not mixed into the signal yet. With S-Video black and white and chroma are on different pins.
Doesn't it have scart too? Only coax means the TV is REALLY old.

[OtisCampbell]

The Vid card has VGA and S-Video.

TV is 7 years old, a Magnavox.

The Video card has 7 pin S-video.  The modulator has 5 pin S-vid input.

[MonMotha]

The 7-pin connector is probably not s-video.  It is nVidia's solution to "HDTV" output and has composite, s-video, and component options on it.  You will need a breakout cable to use it.  Obtain the appropriate cable (should have come with the card), and set the TV out options to composite or s-video as you prefer.  The breakout will have your standard yellow RCA composite jack and 4-pin mini-DIN s-video jack which you can then hook up to a modulator to feed a TV with only an RF tuner input.

If it is one of the (sadly rare) styles that will accept a 4-pin (not 5) s-video cables directly, you can use the appropriate adapter to get composite.  Ideally, set your video card to output composite instead of s-video.  This will usually turn on a filter that results in slightly higher quality video.