DVI to RGB with SOG?

[Nigel]

Hi everyone, I have a small monitor that has the three BNC connectors labeled  R G B. I was told by the previous owner that it works by hooking up to VGA with SOG. My research shows that all I need is to hook up the RGB pins 1, 2 and 3 plus the grounds pins 6, 7 and 8 from the VGA output to make it work. What I need to know if the SOG is provided by a DVI output. Does anyone know??? I dont have any video cards anymore that have a VGA output!!
Thanks
Nigel