Converting TV signal from Amiga to HDMI?

[Thomas]

I doubt there are any such cables. The Amiga outputs an analogue RGB signal and HDMI is digital.

You need at least an analogue-to-digital converter and possibly an upscaler to reach decent resolutions. Both are electronic devices which don't fit into a cable.

Something like this for example: http://www.amazon.com/adapter-converter-convert-digital-CM3-NW-013/dp/B00DL0UEPM/ref=sr_1_4?ie=UTF8&qid=1380033269&sr=8-4&keywords=Scart+HDMI+converter