Question on FR 66s

Dear Halcro: Something is wrong in your whole tonearm/cartridge set ups:

FR choosed Stevenson ( IEC ) alignment for the tonearms mounting specs ( we can choose Löfgren A or B if we want to test in between. ) and that's why the 66 overhang is 12 against the 64 that's 15mm.

Now, following Stevenson and following what you did to change the 230 PtS distance to 233 for " compensate " and can swap cartridges between 66 and 64 is a misunderstood just does not works because if you change to 233 the correct 64 overhang is 14.7mm not the same as the 66 and with a different offset angle/linear offset too and something similar occur with the 505 too.

So that's not only an issue of way higher distortion but a plain misunderstood how to handle how works those equations.

So, please don't delete my posts it is clear that you are hearing " different " things wrong or non-correct " things ", again way higher distortions.

Thank's for your explanation that puts a " light " on your set up that has several " problems ".

If I missed something please let me know.

Regards and enjoy the music,
R.

Dear Lewm: +++++ " It would seem that someone who has actually done this using a quality protractor to evaluate alignment on both tonearms " +++++

IMHO that's is not a " quality protractor " issue but to understand how the whole subject works!!!:

in the link I posted comes everything you have to know about the tonearm/cartridge alignment geometry. Those white papers ( long ones. ) makes a in full explanation in easy words for any one could understand and has all the technical/equations inforamtion too.

The point is that we have to read it carfully, yes it's a long one but if we want to understand about we have to read it.

Through the time I posted that same link because the same subject not less than 10 times and people still don't read it!!!!!

With all respect seems to me that some like you want: " peeled and in the mouth ", this is what we say here in México.

Regards and enjoy the music,
R.

Dear Raul,
CALCULATOR
Using the Vinyl Engine Calculator where you plug in the parameters (Eff Length, Off-set angle and Original Overhang) and then choose the new Overhang desired.........it calculates the NEW Pivot to Spindle distance and gives you all the new Null Points and consequent geometry as well as the new distortion figures.
As the stated Overhang for the FR-64s arm is 15mm......I don't know from whence your 14.7mm derives?
Perhaps you can communicate with Vinyl Engine and let me know the outcome so that I can clarify my understanding?

As for the MA-505s which has the same Overhang as the FR-66s.....and as far as I am aware.....there is no Off-set Angle built into the straight headshells (this is part of the S or P shaped tonearm itself).......can you please explain exactly how to use the Calculator as I must surely be missing something?

So, please don't delete my posts it is clear that you are hearing " different " things wrong or non-correct " things ", again way higher distortions.

As the "distortions you are listening to are infinitely greater than the zero distortions of a linear tracking arm.......how do you decide the limit of what distortions are allowable for the rest of us.....and at which point they are audible?

Raul, North of your border, a spoiled female would say, "Peel me a grape". There's a great jazz tune with that title, written by Dave Frischberg.

If one is going to use a protractor, is it a bad idea to use a "good" one? I think not. I did not use the word "expensive"; I used "good".

Suteetat,
In re-setting the FR-64s at a P to S distance of 231.5mm.......I discovered one cartridge/headshell combination which locates the screws at the furthest point of the headshell.
The Signet TK-7SU in the Yamamoto HS-1As wood shell is the only combination exhibiting this structure.
At this furthest point......it has perfect 'Dertonarm' geometry :-)