There are other arms the use magnet suspension and it has nothing to do with the way of VTF measurement. With ANY arm, regardless of the design, the right and the only relative VTF measurement is in the height of the record itself. Most of the conventional scales do it. What this guy does is using presumably a spring scale that is very WRONG measuring way to use for cartridges, regardless of the design of tonearms. The spring scale does very roughly measures. The can do VERY precise measure but at precision as you can’t stabilize your hand. also, if you spring is calibrated up to .1g then you can make 3-4 measurements and then your spring is gone out of calibration. So, whatever Frank Schroder does in the picture is a pure show for euro -morons and has nothing to do with what a tonearm need.
| perrew wrote:|
|Romy, agree it sounds and looks strange. But the arm works with two magnets, one sitting under the arm/string and the other below it on the base, these two should be parrallel when the VTF is measured and this occurs when the arm is leveled. So if you were to use a normal scale it would have to be level with the record, i.e, the scale must sit beside the record with its plate at exactly the same height as the record itself. Still I dont see why this should be so hard to accomplish, but its the explanation for the fish scale the guy uses in your picture. |