Do NOT use that kind of scandoubler / flickerfixer. Instead, use an external one that plugs into the RGB video port. Most of you guys do NOT know how to properly build an Amiga 1200 tower. I have seen many pictures of people's Amiga 1200 towers and they look like crap.
Using an external flicker fixer results in a lower quality signal (the video having already been converted to analog and needing to be converted back to digital, and then back to analog, once outside the box). Internal flicker fixers would be a far prefereable solution.
blakespot