Uni-Protractor Set tonearm alignment

Dear Genesis168: I understand what you mean with " sound " but we are not talking here about " sound " but what is right and what has higher distortions.

Btw, Stevenson don't fix any of the Löfgren shortcomings. Stevenson always has higher distortions even in the inner grooves, please read my 2-3 last posts or better yet use the VE last link I give to you and make for your self the calculations: it is extremely easy.

I don't give the Dennes white paper link for the figures and plot that you seen " many times " ( good ), I give you mainly for you read all what Dennes write other than those figures/plots/equations. I hope that with a new read for your self this time you understand in deep and clean/precise way: good luck!

Regards and enjoy the music,
raul.

Dear Trabvrow: +++++ " A tracing arc with a specific distortion curve should have the same geometric error and distortions regardless of the arm, cartridge stylus or if the record is stereo or mono, I thought? " +++++

Bravo!!! because things are so easy and not so " clouded " as he want to paint the picture.

+++++ " but picking a tonarm/cartridge set up geometry that has more tracing error will produce more tracing distortion, unless the mathematics used to figure these distortions are a lie. " +++++

I can't say it with better and simple understanding words. This tonearm/cartridge set up is not a Rocket to Júpiter!

Regards and enjoy the music,
Raul.

Dear Jazzgene: Of course you can make the set up at random by ears only, at the begining of some of us on analog ( very old times. ) many of us that have cero know-how on the subject always made this set up almost by ear! so this is not a new menaing.

But ( always exist those " but ". ) that kind of ears set up has several disadvantages like: ears has no Universal " sensitivity ", the ears/mind are biased for what we like or not and that could be far away from real/true, it is almost imposible to make by ears set up a set up with low distortions, a cartridge/tonearm set up must works in any audio system and how could this be when you make the " voicing " in a very limited number of audio systems and audio items?, etc, etc.

Now, I can tell you that VPI was not made it ( set up geometry parameters ) only using ears at random overhang/offset angle. IMHO what he did was using known geometries and adjust by ears what he likes and that's all, changing some of those mentioned three input data. So in reality was not 100% by ears, the posibilities that you can be " there " by ears at random are infinitely low.

Regards and enjoy the music,
Raul.

Interesting. I'll take out the VIP jig again and check it out. Currently, my Grado Statement1 is set up with the Mint protractor. By the way, I emailed Yip about my question asking if he might have a better alternative than his 10x loupe and he refuses to get back to me. Kind of not what I expected as when I was in the process of purchase, he was quick to get back to me.

I noticed with the VPI jig that it is easy to fool your own eyes. Because of the white lines and the black jig, you can trick yourself depending on the position you take in front to view. The parallax effect, is it called? It is easier to check it from above but then again, you never can know if the cantilever is exactly perpendicular to the body front... I am starting to think that exact and precise is not in the cards for cartridge adjustment. The stylus might not even be exact to the cantilever, right?

Dear Jazzgene: VPI designer is a " weird/curious " person:

+++++ " VPI has conducted careful listening tests and determined that every
tonearm we tried sounded better with its mechanical anti-skating
disabled and the tracking force very slightly increased. "
++++

++++ " I did it by ear on my system, not by math on a computer. If you go by distortion you would never use tubes, only solid state " +++++

++++ " OVERHANG ADJUSTMENT:(FIG. 2 AT END OF MANUAL)
Do not go crazy over this adjustment. You do not know if the stylus is aligned
properly on the cantilever. You are also facing a constantly moving
target when playing a record. " +++++

yes, but he take it the work to build a protractor/jig to his customers where he states:

++++ " This adjustment will yield the lowest distortion in the last third of the record, the hardest to track, when playing a typical 12" record " +++++

Certainly not at random and fully by ears.

regards and enjoy the music,
raul.