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There is both an electromagnetic and permanent-magnet ion trap on this set. I've tried to read as many posts as I could about this set before I started and in almost every one I read there were several people that were surprised that they were both in place. The focus coil was at fault for the shadow. adjusting it's position made the shadow disappear. I will do some adjustment tonight to get the bell of the CRT right up to the coil, then adjust the ion traps to make the raster the absolute brightest, then on to the focus coil for no shadows.
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