how do I connect a BBC micro to a VGA monitor?

It's very difficult... The trivial problem is that he RGB socket on a Beeb is TTL level digital, the VGA input is analogue. Trivial, because there's only 1 bit per colour on the Beeb anyway, so a resistor network will convert the voltage levels. The difficult problem is that the scan rates are totally different (VGA is 31kHz horizontal, the Beeb is 15.625kHz). If you have a multisync monitor that will go down to 15kHz (some of the old ones will), then there's no problem, otherwise you've got a lot of work either modifying the monitor or making a standards converter. Probably the easiest solution if you're not a video expert is to use a PC with a TV input card. You could at least feed the Beeb's composite output into such a card (do any such cards exist with RGB inputs?) -tony