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In Reply to: RE: Interesting observation posted by TBone on March 27, 2015 at 14:14:21
Thanks for taking the time to compose that response. I do appreciate it. However, I think your points may be moot. In your first paragraph responding to one of my sentences that you quoted, you are talking about correct "electrical azimuth". My definition of correct electrical azimuth is the condition where you have physically altered azimuth such that any misalignment of the signal generating system with respect to the LP surface/groove (and the visible exterior of the cartridge body) is corrected. In theory, this leads to equal crosstalk or at least lowest practical crosstalk. Very often or at least sometimes, achieving correct electrical azimuth will result in the stylus tip being slightly askew in the way it contacts the groove walls, which might make for incorrect "physical azimuth" for a given cartridge sample.
My understanding of the message I got from Peter Ledermann and others is that the SS OCL stylus needs to have correct physical azimuth. That is, the relationship of the contact points between groove and either side of the stylus needs to be symmetrical. It seems to me that this is not always compatible with correct electrical azimuth. Further, I said that the re-tipped Ruby was riding in a Dynavector DV505 headshell. This headshell fits the tonearm in only one way, such that the bottom surface of the headshell is plane parallel to the LP surface. This won't always give correct electrical azimuth, but it pretty much guarantees that you start out with near correct physical azimuth, unless the stylus/cantilever was cockeyed wrt the cartridge body, from the get-go. That would be an issue with the re-tipping, not that I claim such an issue exists.
I certainly don't disagree that correct electrical azimuth is to be desired, and I did not mean to say that.
Follow Ups:
> > My definition of correct electrical azimuth is the condition where you have physically altered azimuth such that any misalignment of the signal generating system with respect to the LP surface/groove (and the visible exterior of the cartridge body) is corrected. In theory, this leads to equal crosstalk or at least lowest practical crosstalk. Very often or at least sometimes, achieving correct electrical azimuth will result in the stylus tip being slightly askew in the way it contacts the groove walls, which might make for incorrect "physical azimuth" for a given cartridge sample. < <
Yes, my point exactly (although perhaps not well stated in my earlier post)
Restated: given the degree of cut with any particular stylus shape (some more aggressive than others), if physical azimuth is off, or needs to be physically offset in order to achieve "best-case" electrical azimuth, you're still dealing with a compromise setup. And given that compromise; I'd still opt for physical azimuth, because to my ears, this will have an even greater effect on sound quality.
But my opinion is based ONLY on my experiences with certain stylus types. I've never used this particular stylus.
> > My understanding of the message I got from Peter Ledermann and others is that the SS OCL stylus needs to have correct physical azimuth. That is, the relationship of the contact points between groove and either side of the stylus needs to be symmetrical. It seems to me that this is not always compatible with correct electrical azimuth. < <
It isn't compatible, hence the problem. And perhaps Peter considers this stylus less forgiving of physical azimuth errors/offset?
Lew, another possibility maybe that the stylus is mounted well, but that the the cut of the stylus is askew. Also, the problem you're hearing may be related to another issue. I still think this needs to be determined before you can move forward, no matter which tonearm. If it were me, I'd send it back for examination pronto.
tb1
Dopogue is lives nearby and owns a Grace F9E that he set up in a VPI tonearm on a Lenco. (My possibly defective re-tipped Ruby is riding on a Dynavector in a Lenco, too, as it happens.) Yesterday, I took my stylus assembly over to Dave's house, and we simply swapped my stylus assembly for that of his F9E, without changing anything. Dave had aligned his F9E using a Fozgometer, and the set-up checks out perfect for "electrical azimuth". Dave and I together heard the same qualities of distortion from my Ruby re-tip that I heard in my own system, as compared to the F9E, in this case. Dave could hear the problems even better than I, because he is of course more used to the sound of his own system. He felt as I do that the distortion does not seem to be due to any phenomena that we associate with azimuth error, although I certainly cannot rule out that this is azimuth error of the "physical" type, as we discussed.
Anyway, I have been re-energized to send this back to Peter.
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