The Sinclair QL Forum

Thanks Derek but I live in the US. Otherwise, I'd take you up on that.

Many apologies for all of the posts. I was able to rig up a separate 9V power supply and everything is stable. You can't see it in the image but the 9V pin on the regulator is bent up / is not connected to the QL plug. I have already reached out to Keelog and hopefully they won't give me too much tr...

I tried a different 7805 with more or less the same results. It stayed on 30 seconds longer and the supply voltage was able to go lower than 7.8V before output voltage was lost. As mentioned earlier, the supply voltage starts at 8.39V and slowly decreases. As it gets closer to 8.1V that accelerates....

Hi Derek. This is my third Keelog PSU (others are for Commodore 64 and Amstrad CPC 464) and they have been great. I am just wondering if I have a faulty PSU. Is it normal for a voltage regulator to have a slowly decreasing supply voltage? The 9V supply to the voltage regulator seems to be directly c...

Greetings everyone. I just purchased my first QL. I acquired a power supply from Keelog and am connecting to a modern TV via composite video (RGB cable is on the way). The computer powers on just fine with the expected startup screen but after 2-3 minutes it shuts down. I disconnected both microdriv...