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In Reply to: Yes, but the SRA won't change unless you have something other than a spherical stylus..... posted by John Elison on September 16, 2006 at 17:42:59:
I get it. Finally. The SRA is the angle which the stylus is situated in the groove. The VTA is the angle of the tonearm.So, what you are saying is that getting the SRA correct over and above the VTA because situating the stylus in the groove at the correct angle is proper and sufficient.
Changing the VTA changes things, yes, but getting the SRA correct is the goal.
Spherical stylus have no SRA because their contact area is round whereas a spherical is elongated and wants to be straight up and down in contact within the groove.
Did i get it in the hoop?
Follow Ups:
> > I get it. Finally. The SRA is the angle which the stylus
> > is situated in the groove.Yes.
> The VTA is the angle of the tonearm.
No. The angle of the tonearm is added to the SRA and VTA, however.
VTA is the angle of the cantilever to the surface of the record, and therefore defines the arc through which it will swing when the stylus is pressed on. Therefore, VTA is the tilt of the pickup assembly and SRA is the fore/aft tilt of the diamond.
i said the arm. but i knew that the cartridge, being aft down or toe up, was the vta. Why did i say the arm?Thanks Bry.
Just to be ultra clear...The VTA is the angle between horizontal and the cantilever. It's generally specified for the cartridge top being horizontal, and it takes into account how the cantilever will sit at the specified tracking force.
When you move the arm up and down you affect SRA and VTA, but it's the SRA that people are looking to tweak, the idea being to try and align the contact edge with the waveform ridges in the groove wall.
ultimatly i knew that getting the stylus within the groove was 'the thing.' I was nhit with a little Elison pedantics a ways back but that helped to clear up my understaning.Thanks Bry, and thanks Elison.
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