Yes, indeed. However, writing about geometry so early in the AM is not my thing. I wrote 'headshell offset', but the actual tangent should be the cantilever. Which really is the same thing for all practical purposes. It's kind of abstract to visualize from words, and I might not have done the best job. I'll let a master, S. K Pramanik, explain. His article in the June 1980
Audio magazine is a treasure of good information on tonearm design, and everyone interested ought to read it:
"The ideal bearing position is at a height above the record surface equal to the height of warps, which results in minimal changes in relative speed [of the stylus vis a vis the record]. The axis of the horizontal bearing can lead to another undesired effect unless it is perpendicular to the axis of the cartridge cantilever. As the tonearm moves up under the action of warps, the arm 'twists' simultaneously with respect to the record surface. The result is a changing crosstalk pattern as the arm moves up and down, depending on the angle between the transducer elements and the record surface, and this leads to an unsteady or unstable stereo image. In an ideal case the horizontal bearing will be perpendicular to the axis of the cantilever, so that the cartridge does not twist (as shown in the figure)."
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