The following web page is probably the best answer to exactly that question:
http://www.hut.fi/Misc/Electronics/circuits/vga2tv/video2vga.html

The main problem being that the composite signal is interlaced, and
there exists no easy to use, easy to get, cheap line doubler circuits
that convert two half frames into one full frame of video - by now there
may be chips that are accessable to us.  Perhaps you might have luck
with an older interlaced monitor, but I suspect the frequency might be
out of range.

There are commercial products that do this though...
http://www.bhphotovideo.com/product/233061/TVVGAT/REG/2506
http://www.svideo.com/video2vga.html
http://www.ramelectronics.net/html/video-vga_adapter.html (least
expensive of all three)
...

-Adam

Martin.Buehler@KEYMILE.COM wrote:

>Is there a way to use a PC monitor (sync's down to 50Hz) to watch TV?
>The monitor has RGB inputs, and i have a composite or svideo TV signal.
>Any idea?
>thanx!
>tino
>
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