Dell U2711 and U3011 with 15khz Amiga 500 NTSC signals

 

I have a Dell U2711 and a U3011 and they are very similar so the same goes for both monitors.

 

My A500 NTSC with a buffered VGA adapter: regular 640x200 is ugly and dim, looks like macrovision (some kind of automatic gain problem), interlaced 640x400 looks ok but kinda fuzzy, not sharp

A500 NTSC with buffered VGA --> RGBS to YPbPr --> ypbpr cable to VGA --> VGA input: regular 640x200 will not display properly, something is shown but it's like a venetian blind and it's stretched vertically, interlaced 640x400 looks ok but fuzzy as before (You can send YPbPr signals to the VGA port because the monitor supports Sync on Green)

A500 NTSC with buffered VGA --> RGBS to YPbPr -> component input: 640x200 will have the weird venetian blind effect, 640x400 looks beautiful, sharp, deinterlaced properly and nice.

A500 NTSC mono composite out --> Y component input: same as component, only monochrome: 640x200 weird venetian blind, 640x400 is beautiful but monochrome

The U2711 has a composite input (which is missing on the U3011) and you can run the A500 NTSC mono composite out --> composite input and 640x200 and 640x400 both look really nice but monochrome.

It's really a darn shame that monitor manufacturers don't test for 15khz signals because I believe that any modern monitor lcd controller can display 15khz if they want to support it.