New Schroeder linear tonearm, any thoughts?


I noticed Frank Schroeder has a new linear arm without servo motors, pumps, etc. seems like a promising direction. Did anyone hear it at RMAF?
crubio
Henry, I have had one experience with the same tonearm: it came with a fixed headshell but female RCA outputs. I listened to it for several months, and then I bypassed the RCAs with hard wire so to create a straight path to the phono stage. With a Koetsu Urushi I could hear a benefit related to getting rid of the RCA connection. I do agree that with a typical MM or MI, I hear no real benefit running them in my Triplanar or Reed (both straight shots from cartridge to phono stage) vs in my Dynavector (interchangeable headshell/DIN plug in signal path). Anyway, whether there is a REAL difference or not, audiophilia nervosa infects us all and motivates these decisions.
Thanks for the reply Mr Schroeder. I definitely agree that test records set the anti skate too high, but still feel your method seems a bit too low, as you suggest less anti skate than what would be required to keep the stylus stationary in a non modulated groove. What I was suggesting would be somewhere mid way between your suggestion and a torture record test????

Sorry to change the topic. But your new LT arm is just so cool, it got me thinking about it not requiring anti skate, then.....
another way of putting it.

Mr Schroeder's method gives slightly less anti skate for the minimum situation

test record gives the exact amount for the max situation

my method gives exact amount for slightly more than the min situation

????? still don't get your suggestion Mr Schroeder, why have less anti skate required for the minimum situation. have the arm move very slowly to the outside of the record when in between lead out grooves gives slightly more anti skate than what's required for the absolute min situation. does this not seem more logical.
Sarcher and Lew,

I have had identical cartridges (both MM amd LOMC) mounted in the Copperhead, the DaVinci 12" Ref, the Phantom II and the FR-66S all on the Raven AC-2 turntable going into the same Halcro DM-10 Phono Preamp.
The Copperhead has unbroken balanced XLR cables from cartridge to Phono. The DaVinci had unbroken RCAs from cartridge to Phono whilst the Phantom II and FR-66s both have two additional connections (headshell or armwand plus din plug-in cable).
According to the 'theory'.....all cartridges should sound better in the Copperhead and DaVinci.
This was certainly not the case with many LOMCs sounding better in the FR-66S whilst the Copperhead won with most MM cartridges.
The DaVinci did not win 'outright' on any whilst the Phantom II fell apart with almost all MMs?

Michael Fremer has tested identical LOMCs on his Caliburn table using both the Cobra and Phantom II tonearms side by side and was not able to hear any advantages to the 'unbroken' wiring of the Cobra?

If I had heard any hint of this 'theoretical' advantage in my setup.......I would not have ended up with 5 out of my 6 arms having interchangeable headshells? :-)
As always.....YMMV.
Hello Royaloak,
The reason for the suggested undercompensation is the usually higher than acceptable sidethrust on the cantilever, caused by an antiskating mechanism. While the force excerted by the stylus/diamond on both groove walls may be equalized, it causes a permanent cantilever displacement( since the antiskating acts on the arm, not the diamond itself), resulting in a non linear behaviour.
Imagine a speaker being exposed to a certain amount of a DC voltage. The null position of the speaker(where it rests when no signal is present) will have moved forward or backward, depending upon the polarity of said DC voltage. The maximum cone displacement is reached sooner in one direction, it takes a different amount of force to move it forward vs. moving it backward.
Same for a cantilever that has a conventional suspension, dynamic gradation is foreshortened and the resolution of microdetail(what happens around the Null point) diminished.
If one is to reduce the skating compensation to zero, the non linearities caused by non-equal pressure of the diamond on the groove walls will have a larger influence, so zero antiskating isn't the answer either(imho).
And I have not even touched the issue of the coil position against the magnetic circuit when a preload is present. Not as severe an issue and highly generator design dependent, but...

As said in the manual of my arms, my suggestion is a starting point, not an absolute(ly perfect) setting. If your method yields better results, - or results you like better, then, by all means, go by that!

All the best,

Frank