Stylus Rake Angle


I am trying to set up my new VPI 3D arm as close to perfection as I can. On the Analog Planet, Michael Fremer gives one opinion, however, a different opinion was voiced by Harry at VPI, and Peter at Soundmith. I've been discussing this with them....Fremer says that SRA should be adjusted even if the back end of the arm is WAY high up as needed, whereas Harry, and Peter said to start with the arm in a horizontal position and move it slightly up and down to find the sweet spot. Peter said that my cartridge (Benz LPS) and some others have an additional facet in the diamond so bringing the arm up in back would be exaggerating the proper SRA. When I wrote back to Fremer, he answered with an insistance that he was correct. Does anyone want to add to the confusion??
128x128stringreen
Don_c55, I think what most people are adjusting for with fine VTA adjustment is actually proper overhang. Adjusting VTA will change overhang slightly. IME overhang adjustments make more difference than SRA adjustments. This is just a theory and I have no hard evidence to support it but it is my suspicion. Not to say SRA does not make a difference because it does. I just think fine VTA adjustment has more to do with dialing in overhang than it does with dialing in SRA.

Sean
Csontos, I don't think so but you could say the same thing about SRA as well. What percentage of 1 degree of SRA is adjusted for with fine VTA adjustment?
I'd say it's pretty well infinite. But the change in overhang as a result is so exponentially minute as to be irrelevant once it's been set with VTA in the ballpark.
"Adjust for proper timing between fundamental and harmonics."
Since it came from Frank Schroeder, who is widely regarded as a guru in all matters vinyl, this simple statement sounds brilliant and true. Now, will someone please tell me how "timing" is affected by SRA? I thought I knew that timing was the job of the turntable. Perhaps what is meant is that when proper tonal balance is achieved (by optimal adjustment of SRA/VTA) then harmonics are more naturally portrayed, which may give one a sense of better time-dependent relationships. (I don't really even like this, my own, explanation.) But when a guru speaks, the faithful must struggle to understand.

My difficulty understanding Mr. Schroeder's statement (which you all seem to accept as gospel) reminds me of a well worn anecdote about an all-knowing Buddhist monk who lives high in the Himalayas. A group of his acolytes struggle for months through deprivation and hardship, climbing to reach his lair, whereupon they ask him, "Oh great one, please tell us, what is the meaning of life?" His response: "A wet bird never flies at night."