*********** REPLY SEPARATOR *********** On 1/3/02 at 9:00 PM Dexter wrote:
>Hi all, > >I've been sat like a hawk on Ebay waiting for a QL to come up for auction. >I recall the US QLs had a different ROM version and PSU, but are their any >other differences? >Is there a PSU and/or power supply section schematic anywhere, so if I got >one shipped over, I could convert it for US 110v 60Hz operation? I'm >competent to do it, *with the right information*... > >Dave You need a 8V DC minimum at 1.8A (1A is more than enough if you don't use any peripherals, but then you'll hardly be able to do anything much) and a 12-15V AC power. The 8V DC goes into a 7805 regulator, the 15V AC is used for a +-12V supply (there is a rectifier and a 78L12/79L12 regulator pair in the QL). If you are willing to modify the QL a bit you can use a +5/+-12V power supply, these are commonly available at various surplus dealers. Also, if you can get a RGB monitor capable at operating at the right synch frequency, don't bother with a US QL, you will likely just give yourself more headaches with incompatibilities. An old Sony 1301/2 or 1401/2, NEC Multisynch 3D and similar are perfect for the QL and it also goes up to SVGA. Again, you should be able to get one for $50 or so at surplus dealers. You might need to do a resistive divider on the RGB lines to get the TTL output voltage down to 1Vpp standard RGB analog input level. Nasta
