Heh. That was my first guess too -- but I've never
seen this particular
thing used on a composite video signal before. (Well, maybe the L+sync
used on b&w monitors...)
I have a couple of JVC monitors with BNC composite video connectors.
These are the monitors salvaged from a video editing suite... I actually
saw BNC used for composite video on a fairly regular basis in the TV
studios (I think I saw that more often then seeing RCA connectors)
My assumption will be (until I can check it out) that
these are simply
split off of the original apple RCA plug on the mainboard, and carry the
same signal. (I hope this is the case, since it would be a simple matter
of fabricating an adaptor (for which I may have the parts...).
You can buy a BNC to RCA adaptor from places like Radio Shack (or even a
BNC to RCA cable... although I am not sure Rat Shack stocks those
anymore... might be special order). Or, like you say, it is fairly
trivial to build a custom BNC to RCA cable.
-chris
<http://www.mythtech.net>