Graham Phantom Anti-Skate. Is it effective at all?


I've had my Phantom Supreme over a year now, and for the most part it's been a pleasure. Beautiful build & sound; awesome VTA and azimuth adjustments. My main hangup had been the headshell; getting a Koetsu to sit flat on the 10" wand seemed impossible because the correct overhang pushed it all the way to the back, behind the main headshell points of contact. Finally I just used 2 plastic washers as shims to get a nice flat mount.

Now my main concern is the anti-skate. I'm not sure if all Phantoms are this way or if it's an issue with my unit. I can't seem to get an effective amount of anti-skate. My preferred method for adjusting anti-skate is to drop the needle in some dead-wax before the label (NOT into a lead-out groove) and adjust so that the stylus creeps *slowly* inwards. With my Graham, I cannot achieve that...it always moves quickly inwards no matter how far out I set the weight. Even physically pushing down on the weight doesn't seem to have much effect in swinging the arm. To me, this seems like the mechanism is not effective, as if I'm running without any compensation. This is very unlike my experiences with a Fidelity Research FR64fx (weight and fishing line) and Clearaudio Magnify (magnetic) -- both have a very noticeably effective anti-skate mechanism, which I can easily dial-in as described above. In fact I just setup a Magnify...it was great!

On my Graham, the pulley & rope system seems to be correctly in place. But without a 2nd until to examine, I can't determine whether this is normal. Could other owners/users of Graham please comment on their experiences with its anti-skate? The situation is OK for now -- I burn hours on my good cartridges very slowly and sparingly -- but I'd rather not have my nice cartridge seeing asymmetric wear over the long-run.

-- Mike
128x128mulveling

Showing 1 response by sfischer1

Regardless of whether you choose Baerwald, Lofgren, or Stevenson, the alignment is based on 3 parameters or measurements:  PivotToSpindle, PivotToStylus, and OffsetAngle.  Fix any two, and proper alignment will require you adjust the third. 

If you have an arm with a fixed mounting position on the table then the first is set as well as the OffsetAngle. This leaves only the abiity to change PivotToStylus unless you don't mind varying the OffsetAngle in the headshell.

Let's say you have an arm mount which allows you to vary the PivotToSpindle. In such a case you should be able to pick a good position for your cartridge in the headshell slot, with the cartridge straight (not rotated), thus fixing two of the three parameters. Then you could achieve proper alignment by sliding the arm mounting position. 

Sometimes, the specified PivotToSpindle distance is not optimum.  My old Fidelity FR64 allowed for easy rotation of the cartridge in the headshell. This was useful since when mounted using the template, fixing the PivotToSpindle, and installing the cartridge, fixing the PivotToStylus, only the offsetAngle could be adjusted.  The old Fidelity arm mounting posiiton was not specified with Baerwald in mind.  But, if you can move the arm mount, you could set the cartridge square in the shell and then move the arm base as needed.

Thankfully, the current VPI JMW PivotToSpindle spec seems to be correct for easy alignment using any of the 3 Alignments (Baerwald etc.)

It seems to me that the choice of which optimization to use (Baerwald etc) can be informed by the predominant type of record played.  I prefer the Baerwald's more gentle degradation of the tracking angle error at the record center  since I listen to much classical music which often runs to the limits of the inner radius and will often have crescendos at the end of a side.

As far as anti-skating being unimportant: It seems to me that is nonsense since a lack of anti-skating force is easily heard in highly modulated groove passages as gross distortion/breakup.