Would the first run of PCBs theoretically fit a Sharp Twin Famicom?
It would need to be wired into place, I suppose.
Nice work! Does the board work on 50Hz PAL NES units as well as 60Hz NTSC units ?
Yes! It works on the PAL and NTSC NES equally well. I'm from a PAL country and wouldn't have it any other way.
I guess I'm not fully satisfied with screenshots of commodore monitor (though the recorded video looks good); have you noticed any issues with jailbars (especially after passing through an image processor such at the xrgb mini)? Tested with "problematic" carts that appear to worsen the effect on other rgb mods (powerpak for example)
There is no visible interference/noise in the video signal.
Great been waiting for this. I understand that is uses RGB, S-Video, Composite and Composite video but are these connections on the NESRGB board that you solder to and then u make your own cable up be it RGB Scart plug or BNC cables etc??
You can if you like. I will supply a female 8 pin mini din socket (same as XRGB-MINI) and 3.5mm audio jack socket with the board. I recommend using them as they are easy to mount and I will be supplying SCART cables to suit this configuation.
One question... My NTSC NES has horrible interference. Wavey lines, like some kind of sine waves running down the screen. Barely visible (but there) with dark colors and infuriatingly impossible to ignore with light colors (blues/greys in particular).
I think you should fix your NES first... Maybe the filter capacitor before the voltage regulator has gone bad?
How is the relative RGB image quality vs. a "standard" RGB implementation using a Playchoice PPU?
The image quality is excellent. I don't own a Playchoice PPU to compare.
Looks great! Have you tested this on a XRGB?
No, I don't have one.
Is the output configuration essentially the same as your GGTV kit? Looks like you're using a ROHM RGB encoder:
Yes, it's the same.
From the PCB picture it looks like you have the output 220uF capacitors in reverse? Or is the stripe positive on those types?
They are tantalum capacitors. The mark is on the positive side.
What are the chances you or someone else will be selling pre-modded systems?
I will not, but surely somebody will.