Turntable speed accuracy

Alberporter: Intuitively, I would think that what a dd turntable sits on would have a big effect on its sound. Maybe you've addressed this with plinths, but I would still think what that sits on should be discussed much more than it is, and wonder why it is not. Is that because the plinth lessens the need for proper sitting(A little bit off the subject, but what the heck.)?

Guys, Yes, I thought of offsetting the Timeline so it rests essentially above the spindle or so that the spindle can enter it just enough to center it. However, my fear then is that if the Timeline is even very slightly off center, it will make the TT appear to be off speed. This is because the Timeline seems SOOO sensitive to slight speed variations. It seems to me that it would not be difficult to provide 3 different adapters with the Timeline so as to fit each of the 3 possible standard spindle diameters snugly. Errors due to off-center positioning of the Timeline could be quite misleading. (Or maybe not; I have to think about that.)

Hiho, I think the L07D servo was designed to be "underdamped" as well. Whoever the guy was who modified his own Technics, he either has developed a good understanding of how its servo works or... not. The very idea of playing around with the servo is a whole new can of worms.

Mmakshak,

The plinth is important in that it provides a solid platform for the powerful DD motor to operate without vibration or oscillation. I had one direct drive table here that was so light it almost sounded digital.

You are correct that what a DD table sits on could be discussed more. Truth is all turntables react radically to outside forces and the stand, platform, spring base or whatever plays a huge role.

For me it's most important to isolate my table from foot falls and effect of my powerful sub woofers. I choose Vibraplane and I am totally satisfied with what it provides.

I was so moved by the performance upgrade from Vibraplane I bought a second one for my Studer tape machine. Surprisingly it provided almost as much upgrade there as the DD table.

I think we still have quite a lot to learn about isolation. I wish I had more money and time to experiment. Seems an endless task with all the variables.

Lewm
Do you think that adding mass to the platter of an existing dd turntable( assuming the spindle bearing is up to the task) could also achieve the same effect as "loosening" the servo response.
Perhaps the periphery clamp of the LO7D helps to achieve this.

Here is my vid of me touching the side to test pulsed speed stability... it is a hung suspended table so you may see it move alittle actually its just the suspension moving laterally
http://www.youtube.com/watch?v=PB2TaN2FPRU&feature=youtu.bey... no movement on the strobe!