The ghosting you are experiencing is the Spectrum 128 +2A / +3 not providing enough voltage to fully switch the TV into RGB mode. The power supply from the Spectrum RGB socket provides limited current which occasionally on some TVs results is not enough and results in the ghost shadow which you have on the screen. This can be resolved by connecting an external 3V power source to pin 16 on the scart plug - lithium battery or pack.There is a link with information here: http://www.bytedelight.com/?page_id=1553
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