Date   : Fri, 20 Mar 1998 19:12:20 +0100
From   : "Mark Usher" <marku@...>
Subject: Re: RGB Cable to Microvitec Monitor

>I've recently dusted off my old BBC B and started using it again. I also
Good choice :-)

>have a Microvitec monitor (the one you always used to see attached to
>BBC Micros), however I seem to have mislaid the cable and I need to make
>a new one. I've managed to source the 6-pin DIN plugs from Maplins
>electronics but I need details ofthe cables and the pinouts.
>
>I cant find the old BBC User Guide although I have found my original
>copy of the Advanced User Guide but this is of little help.

Looking at the back of the beeb

0v                        red
                5v

   sync                 green

               blue

>In the meantime, I've been using the composite video output (in black
>and white) but if memory serves, there was a simple way to get colour
>out of this connector - can anyone remember how this is done?


On Issue 1, 2 & 3 boards a 470 PicoFarad capacitor should be fitted between
the emitter of Q9 (identified by an "e" next to one leg) and the base of Q7
(the central leg).

On Issue 4 and later, the capacitor is on board and can be connected simply
by fitting link 39 which may be found next to the modulator in the far right
hand corner of the PCB.

On the BBC Model B+ link S26 should be made.

Mark Usher
marku@...