Date   : Sun, 22 Apr 2007 22:59:30 +0100
From   : RS432@... (Mick Champion)
Subject: BBC to VGA monitor converter

neil f wrote:
> Someone was asking about using a PC type 60 Hz VGA monitor with
> a Beeb a while back. I see Maplin are doing a deal on one
> currently for ?39.99.
>   
I have found the composite output from my BBC B's to be very poor 
compared to the RGB output. I currently use a "logic 3" box from Maplin 
to abuse a flat screen monitor, and have found it completely 
unsatisfactory. It converts using composite like the gadget Neil 
mentions although his finding is hopefully better. It can't be any 
worse! Using the "logic 3", I get frequent screen jumps in a smog filled 
mode 7, and hazy 80 character modes are very hard on the eyes indeed!

Do you think that better results could be achieved if the RGB from the 
beeb could be converted up as RGB rather than encoding it to comp, and 
decoding back to RGB? Does anyone know of a reasonably priced device 
that can up-convert RGB to RGB? Or a circuit diagram for one 
perhaps????? I suppose another option would be to have a device that 
created a more stable composite output from the beebs RGB, but I'd 
rather the first option if I get the choice. The Master seems to have a 
far more stable comp output. I wonder why?



Cheers,

Mick





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