Cartridge Change Overhang Difference-Fixed Headshell


I’m using a SME fixed headshell arm and an Art9 cartridge that was mounted with a Yip mint protractor. The Art9 mid hole to tip distance is 11mm. A new Art20 is stated as being 10.5mm. Opinions wanted as to use same protractor or not or Estimate the 0.5mm and shorten the arm, pivot distance. Note, this is not about the $130.  That difference of 0.5mm would change the intended null points (Baerwald) and/or ultimately affect the sound in general shifting the distortion to slightly different points on the record? Thanks

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Showing 3 responses by wlutke

The Mint LP target is specific to the pivot to spindle distance. Since that distance hasn’t changed, use the target. If long or short of the target, be aware that the Mint’s null points and their alignment grids  will no longer apply.

@bigwave1

I have a Mint. My spindle to pivot was off by less than 2 mm and I could not get the cantilever to align at both null point grids simultaneously. I could get the stylus over the target at each null but the cantilever would be parallel to one null grid and not the other. The curvature of the Mint's printed arc was too steep for the added 1.5 mm s2p, affecting the angle of the grids. That was for a 250 mm s2p. What does that mean for you in a practical sense? With the overhang error don’t beat your head against the wall trying for simultaneous alignment at the nulls. Just a little bit off will affect the Mint to a noticeable degree. The Mint, like any protractor, gets the cantilever alignment only in the ballpark. What it does exceptionally well is set the proper overhang for the s2p, assuming the s2p is exactly to spec. If it’s not to spec or if the overhang is fudged, it defeats the Mint’s superior accuracy in that regard.

@rauliruegas 

Agree.  Any protractor that can compensate for p2s variance will do a better job in this instance.  When the Mint’s ability to set overhang and alignment are both compromised by the rigid cartridge mounting scheme, it goes from a mathematically correct protractor to a sloppy one.