ld wrote: Actually the arm shouldn't move tracking signals, and mechanics are broadly similar for highC/lowm and lowC/highm arms, when all is configured well. So I doubt the 'bearing' theory. But there may be 'non-ideals' at work. Have you tried Lofgren B alignment with 0.7mil sphericals, BTW ?
If you looked at my crude "u-block" bearings you would immediately see this is bearing rattle hell!
As for baerwald/stevenson/ld/etc, i don't care at all because i'm 100% confident it's not alignment what is causing the problem. I can easily change the stylus-to-pivot distance in 4mm (beacuse of my very-loose bearings) and the problem is still there.
Anyway, right now i'm using a modified AT11(i have replaced the cantilever and stylus on it with a lower mass one, while keeping the (moderately low) compliance rubber. This one is noticeably higher compliance (than the SC35C), and doesn't exhibit any obvious inner groove distortion or sibilance. Has a 0.6mil stylus tip (in my case). But while it's a fine performer, it doesn't show the amazing punch and life of the SC35C.
I'll give another try the SC35C once i put another arm in the Lenco. I have other arms so it's just a matter of time. As i said before, this problem wasn't there when i used another arm, a Linn Basik+. But said arm is too light mass for it.