15Khz RGB YUV Video to VGA Converter Scaler For Amiga Atari Apple IIGS

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And we don't have it in aus either but that didn't stop me buying an Amiga to scart cable and the scart to hdmi converter.

you really don't need those
if a monitor have HDMI input means that will accept 15hz amiga modes through VGA input
 because those monitors have internal circuitry that do the same that the adapter scart to hdmi
so you will need only a normal Amiga VGA adapter+ a monitor with HDMI input

examples:

Dell U2410
Samsung  syncMaster 2493HM
BenQ G2420

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My Samsung 21" monitor is a 1080p with VGA, DVI and HDMI connections. So which connector do you recommend to use with the A1200?

the vga adapter must work on your monitor...you can try it first you buy another expensive adapter
on amikit they sell those for 15 or 20 u$ I do not remember very well
also you need a vga cable of course

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Most monitors and TV's outside of Europe dont support 15khz RGB modes because they dont support scart - the only screen I have that can handle 15khz via VGA is my 50" Pioneer professional Plasma Monitor in my lounge room.

it's not related if the monitor is euro or if support scart...is related to the monitor capabilities
The 3 monitors I listed above are not for the euro zone but guaranteed that support all amiga models through vga adapter
what I calculated is that if a monitor have HDMI input+vga ...there are 90% of chance that a normal vga adapter will works
of course I can't guarantee that all monitors will work...but the HDMI presence is the green flag to try