Uni-Protractor Set tonearm alignment

Addendum. My point was why intervene? This way we already
missed the answer about the status of the FR-64S. Is this
arm the real King or the false one. I have the strong impression that Raul keept his strongest arguments for later. But alas. I myself hoped for some result like:'the
King is dead... long live the Triplanar'. So to me it looks
like a much better scenario to organize a duel in which both partys will use their own tonearms instead of swords so we can after the event discuss about the qualitys like:
stiffness, effective lenght, effective mass (sic!),etc.

Regards,

OK, so what are we talking here? Curves and distortion figures? If so, then just sell your turntable and go back to your 80's Japanese Pioneer amplifiers with vanishing levels of distortion and to your "perfect sound forever CD player". You will not have to worry about all these that would complicate your life and spend more valuable time time listening and enjoying to your music.

Tonearm and cartridge setup is a lot more than a good protractor. The variables are almost infinite. Vinyl playback is also very flawed. Most records not pressed properly to begin with. Spindle holes not centered (so where is the arc?)and few are perfectly flat (VTA anyone). Many records are warped some way or other.

Dertonarm here IMO is making a very good tool here for those who can afford. It will save you a lot of time and aggrevation trying to get things right. There are also different templates so you can try different curves. If you can afford it, by all means order one for yourself and save your precious time trying to find the perfect alignment on a little "mint" or "wally" and use that time enjoying the music. BTW, I got one myself.

All we are arguing here are merely numbers and nothing more.

So guys, relax..... and like Raul always says "enjoy the music"

Well if Raul's tonearm works out as well as the phonolinepreamp, we can call it Edsel

Probably it needs some extra steps

Enjoy the music

Dear friends: I know for sure that many of us does not understand in deep the geometry cartridge/tonearm set up with both Löfgren solutions/equations and this fact is normal even some tonearm designers did not either, I know this because I asked with no certain responses.

The Löfgren equations, as I posted , are the only ones that exist that as a main targets are to calculate overhang and offset angle due to three input numbers ( tonearm effective length, most inner and outer groove distance. ), the calculation needs no other single input number and this fact is similar for the other clones/Copy solutions ( Baerwald, Stevenson, etc, etc. ).

We don't need any other geometry parameter to make a tonearm/cartridge set up: effective length, overhang and offset angle are all we need. Even we don't have to care on the null points.
The null points are calculated and used for other things than stylus-cantilever/tonearm geometry set up.

The Stevenson A cloned/solution ( adopted by several Japanese tonearm manufacturers. IMHO with out in deep analysis. ) is not something with " new " equations, Stevenson only wanted that at the inner groove the tracking error be cero so he taked one of the three input numbers ( in the Löfgren formulas. ): most inner grove distance as one null point and that's all.
This " solution " gives you almost cero tracking error/distortion in the last 30 seconds of a LP with a higher distortions on all the remaining LP surface than in any other " solution ".

Any one of us can change ( in the Löfgren equations. ) this same input number and Voilá! we have a " new " Perry/Jones/Lopez/etc solution!!!.

Till today, IMHO, no geometry set up solution beats the Löfgren ones.

The Löfgren solution passed ( and is. ) trhough a Optimization process ( minimax principle. ) to achieve the criterions that I posted in my Thuchan answer.

Today there is no known equations or process that outperform the Löfgren optimization formulas to calculate: overhang and offset angle in a pivoted tonearm in static playback conditions.

Regards and enjoy the music,
Raul.

Dear Genesis168: That's why any decent protractor helps for the set up, that's why the 20.00 one that I'm using right now and the 2.00 that use Downunder works wonderful.
We need only that the choosed protractor be " aligned " by/under Löfgren approach, if fulfil this approach then that single protractor is all we need to make the set up in any pivoted tonearm and with any cartridge.

Downunder: got it?

Regards and enjoy the music,
Raul.