VPI 2nd Pivot for 3D

Dear @slaw : """  But the 2nd pivot mod also changes the original design concept, thereby making it (not a unipivot anymore). This is, I think, the argument Raul is making and the point I was initially referring to. """

That's it, thank's to put the " ligth " on what I wanted to explain with out to much success.

@billstevenson , only for you can think about: the VPI unipivot and the one with the 2nd pivot overall are the " same " but the dual pivot performs way better.

My starting participation in this thread through my Stringreen anser was that the dual one performs better because the 2nd pivot gives it a way better stability.

Now, that was and is my argument but you disagree telling that the unipivot has no un- stability problems ( when in reality has. ).  You posted " facts/tests " trying to prove it with no success.
So, why all the named tonearm manufacturers gone for the dual design ( changing from unipivot to dual pivot. ) and all dual pivot tonearm owners attest with out doubt the dual pivot better performance if it's not that the dual pivot has now better stability that's something the cartridge ask/shouts for it.
No pun intented, just think about.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

Just another point on the 2nd pivot.  Using the Fozgometer...take your time and get it perfect...it can be done with the 2nd pivot...just screw it down or up and it stays.  Its almost impossible to do without the 2nd pivot in place.  As the  Foz needles get closer, just a small adjustment makes a very big difference. My Foz meters are nearly pegged for both left and right.  It makes a very big difference in the sound.

Dear @billstevenson :  """  How critical is the geometry issue in practical terms? Records are imperfect anyway. Get everything dialed in for side A only to discover that things are skewed for side B. """


Well, what means practical terms?. For you can be something different than for other gentlemans.

My take is that with analog/LP everything is of critical importance and certainly the cartridge/tonearm set up is extremely important and must be accurated. It makes a difference for the good or bad depending on that accuracy levels in the set up.

I totally disagree with the statement you shared because if we think in that way then what @stringreen posted about the Fozgometer " alignment " has no importance for almost no one when in reality it has.

Why we need to take care as better we can of any single parameter/set up in analog/LP?, because is a medium totally imperfect and we can't acculates additional " imperfections " in that " equation ".

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

Sorry, in last sentences we have to read: accumulates instead acculates.
R.

I apologize for being absent for a few days.  I live is South Florida and Irma has turned our lives upside down here.  Anyway, without power and no air-conditioner it is difficult to get excited about turntables.  I have no idea what you are trying to say in your post above Raul.  Perhaps someone else can interpret for me?  Just in case my last post was not entirely lucid, my point was that no matter how precise we try to be with TT setup, the medium is inherently imprecise and compromise is part of the game.  No matter how careful we try to be, the records we play are themselves not perfect:  not flat, holes not centered, equalization imprecise, etc..  Everything is a compromise.  We do the best we can.  And you know what?  Don't despair, our efforts are not in vain because as most of us know full well, a vinyl record very often sounds better than the digital equivalent for all it's claimed perfection.  And we also know that we can strive for further improvement through refinements in setup, experimentation, ever improving cartridges and pre-preamps etc.  And, in the process we can have a lot of fun.