Video Scalers: Can I Improve Sinclair QL's Video?

In this journal entry I'll explore my collection of Mini video scalers. I recently added to it with an AV-to-VGA model that I'll try on my Sinclair QL. The aim is to see if I can get an improved monitor signal that shows the entire screen in full color.
#Sinclair #QL #Video #Mini #Scalers #Retro

[@ElectronGordo]

Thanks! :) Actually I am very interesting on it and trying to get involved into Marcels solution for RGB2HDMI device. So this video helps me to get a better vision about developments

[@gregskuza7166]

I have a question about US QL. I just pick one up and I’ve been having some weird video issues when starting one of the games downloaded of the web the game sometimes will show properly on my RGB Amiga 1084 monitor where I can see the whole screen but sometimes (70% of the time) it will cut off the lower 1/5 off the screen. Can’t figure out what is causing it as my UK QL always shows the full screen. The composite video acts the same way as RGB so it looks like the ULA1 is not providing proper video out and actually when I plug my Sandy super board then the game will run but most of the time the screen goes completely blank. My US QL has some extra rework done in top of the ULA1 with additional diodes and a capacitor which my UK did not have. I wish my UK still worked so I could try another ULA in my US QL but unfortunately the ULA 1 in my UK QL died and I can’t find a replacement for it anywhere. Any help would be greatly appreciated.

[@8BitRetroJournal]

Oh cool. I don't think the US NTSC versions are as common. Yes, in TV mode, the NTSC signal gets cut off on the bottom (I think it loses 64 lines)...that's totally normal. It's done so the US TVs could handle the signal (NTSC has less lines than PAL). I think if you swap the ROM it will likely give you back the full screen. The US ROM (JSU) also creates slightly smaller characters in TV mode to fit as much info as the UK ones do with the extra 1/5th they have. It was a weird way to implement it but back then most users had TVs before they had monitors.