TLDR: Can I safely install a rheostat/ pot on the VM wires to on my Sony 20FV12 to get optimal sharpness at high picture settings?In theory, scanning velocity modulation (VM) can be beneficial for a CRT, as a means of compensating for the thickness of the electron beam at higher picture levels. However, most TV makers that included it applied too much for the image, essentially making it a marketing gimmick for "enhanced sharpness". The VM on my Sony Trinitron 20-FV12 is too strong, even at its lowest enabled setting, with sharpness set to minimum and picture set to maximum (AKA hi). Would installing a beefy rheostat or pot on the wires connected to the VM coil enable me to reduce the amount of VM in a safe and effective manner? This would be modding the TV, of course.
As you can see, the VM distorts the thickness of the white circle in the picture, but brings the overall sharpness of the bright image closer to that of the dim image. If only i could reduce the strength of the VM like in a BA-6 chassis...