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In Reply to: RE: Feikert alignment jig posted by dirtyvinyl on July 05, 2015 at 16:37:18
I have an HRX and an AT ART7 which has the same body as your 9. I initially tried to set it up with a Dennisen Soundtractor, which uses a very similar pivot pointer-on-a-beam connected to the spindle system. On my VPI JMW 3D arm, I had to remove the lemo connecter and move the wire so that I could get unfettered arm movement with the 'tractor's pivot point in place I also had to avoid burying the point in the hole on top of the arm's bearing housing for the same reason. You might want to do both these things. You may also find that you have to twist the cartridge significantly counterclockwise as viewed from the front in order to align the cantilever properly. I asked VPI about this, and HW himself explained that the abnormally long distance between the stylus tip and the mounting screw holes made that necessary. Hope this helps. Regards, zach
Follow Ups:
"You may also find that you have to twist the cartridge significantly counterclockwise as viewed from the front in order to align the cantilever properly."
I wonder why the owners manual shows the body of the cart aligned with the grid.
Based on that, the stylus would be WAY out of wack in my setup.
I asked HW the same question. He told me that the various VPI instruction manuals were being rewritten to say that cantilevers, not cartridge's leading edges as in the photos in the manuals, have to be aligned in the mounting jig grids. Hard to do on a non-mirrored jig such as the VPI. Still hard,but not as impossible, with the Mint LP or a wallytractor.
In many/most cases, the cantilever will be parallel with the long axis of the cartridge body (where the cartridge body is rectangular). When that is the case, of course, one can use the lower edges of the cartridge body as a guide for what is happening with the cantilever alignment, even though the latter is out of sight. Thus it is no big deal to align the cantilever using the edges of the cartridge body as a surrogate. One mirrored alignment jig I used, the Turntable Basics, was a bit maddening because the thickness of the glass put some distance between the mirrored subsurface and the grid with which one was supposed to align the cartridge. I now own both an "old style" Feickert (with the larger white base) and a UNItractor, which uses a mirrored surface much superior to that of the TB, and with tools (magnifier and light) that enable one to see what's going on. What I particularly like about the Feickert is the ability to measure accurately enough the P2S distance, which is lacking in the UNItractor. Both protractors work fine 99% of the time. In fact, they agree with each other. Beyond that, I've decided not to care.
I have the Feikert gauge and use it on VPI tonearms. It looks like you are using it correctly. I suspect that the sibalance may be fixed by increasing the tracking force and/or dropping the ass end of the cartridge a bit using the VTA tower adjustment.
I do believe nudging it up and now listening with it lowered, may have reduced things. I may let it play as is and enjoy for awhile. Not eliminated, but a bit less than earlier.
Sibilance will not usually be caused by incorrect offset. This will cause distortion but the degree of it will be affected by the stylus position from outer to inner groove.
I suspect either too low VTF or the discs themselves may be the problem. However if the cartridge is set so that the SRA is such to cause excessive brightness(the arm pillar is set too high)this will exaggerate any sibilance. So try lowering the arm pillar. Note I refer to SRA and not VTA, the former being the most significant and more easy to ascertain. If you want to set it correctly and not rely upon your ears then click the URL. You will note that it does not need to be adjusted to account for different record thickness (I note your refernce to VTA adjustment on the fly).
Thanks for the link.
Seeing where it was going,I suspected it would refer to using a scope to achieve the magic number(92)
If trial and error get me nowhere as I fuss with it, off to the shop!
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