I tried to connect my raspberry model B to my old CRT a few weeks ago, and it didn't work.
After googling a little bit I discovered that my cable wasn't compatible. Fortunately I had a 4 pin jack connector and after a few soldering I was able to fix the cable.
It also didn't work, I googled again and I discovered that I have to configure the config.txt file. I couldn't because I was in my village house and I didn't have internet and a proper computer to do it.
I've bought the following adapter in ebay to fix my old cable and have the proper pin connections:
The adapter is coming from China so it will nedd a few weeks to arrive.
I thought that connecting the raspberry via 3.5 jack connection I will have a video image like the classics arcade. With the feedback from "tifsmo" I'm worried if it's worthy all this effort.