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In Reply to: John, most of the time I just use the Geo-Disc for alignment. posted by alaskahiatt on October 16, 2017 at 00:32:29:
If you rotate the protractor in such a way that the stylus does not sit on the null-point, you are not aligning the cartridge correctly. The null-point falls on the radial line from the center of the spindle. If you are placing the stylus somewhere else, then you are erroneously aligning the cartridge and your alignment is meaningless. However, if you are rotating the protractor to place the stylus on each null-point, it is not possible to achieve a 66/120.9-mm alignment with the Kenwood tonearm. On the other hand, if you are moving the stylus closer to the spindle while rotating the protractor so that the stylus still falls on the radial line from the spindle, you are simply defining a different null-point, which you can measure from the center of the spindle hole to the stylus. For example, you should be able to align the cartridge on the Kenwood tonearm for a null-point of 66-mm and a null-point of 60.5-mm. Perhaps that's what you're talking about.
Null-points always fall on a radial line from the center of the spindle. They are designated only by their distance from the center of the spindle and nothing else. While it is true that the stylus also defines the position of the null-point around the spindle, it is actually the null-point and alignment grid that defines the cartridge's position in the headshell slots. After all, you are using the protractor to align the cartridge and not the cartridge to align the protractor.
Best regards,
John Elison
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Follow Ups
- RE: John, most of the time I just use the Geo-Disc for alignment. - John Elison 10/16/1709:51:42 10/16/17 (1)
- We are almost there John when you say "moving the stylus closer the - alaskahiatt 10:25:20 10/16/17 (0)