LamerDeluxe (tm)
500+ Head-Fier
I think the 3400 probably just has better tracking and error-correction, that's why it doesn't skip easily.
The clamping system of the old Sony's like the D-25s is magnetic, it seems to clamp well enough. Only problem I heard of is that the clamping mechanism sometimes fails to center the disc properly, resulting in vibrations, in turn resulting in spindle motor ball-bearing problems.
Later models like the D-33, D-66, D-515, D-311 etc. have the plastick 'ball-bearing' type spindle hub. Problem with those is that the plastic clamps break very easily, almost all of the players I have with that system have broken clamps.
You cannot simply change the magnet clamping system with a ball-bearing clamping one. Maybe if you'd swap the spindle motors as well, but they would have to have the same specifications.
The clamping system of the old Sony's like the D-25s is magnetic, it seems to clamp well enough. Only problem I heard of is that the clamping mechanism sometimes fails to center the disc properly, resulting in vibrations, in turn resulting in spindle motor ball-bearing problems.
Later models like the D-33, D-66, D-515, D-311 etc. have the plastick 'ball-bearing' type spindle hub. Problem with those is that the plastic clamps break very easily, almost all of the players I have with that system have broken clamps.
You cannot simply change the magnet clamping system with a ball-bearing clamping one. Maybe if you'd swap the spindle motors as well, but they would have to have the same specifications.