The TV-out refers to a mini-din connector of up to 9 pins, or possibly to a single RCA jack used for composite video. They would output composite or S-video at 480i, and *only* at 480i. Later models often had component video as well, and that might go higher.
However, the answer to your question is (mostly) yes. Newer versions of crt_emudriver (beta 13) can output composite sync directly over the VGA or DVI-i port, so any vga-to-RGBScart cable intended for a projector will probably work with any of those three cards - you'll need to check the specs on then having DVI-I (=analog) for yourself. The only issue might be if your TV doesn't like TTL-level sync.
Calamity, what level will cards output C-sync at? How safe is delivering 5Vp-p where the sync circuitry wants -0.3Vp-p?