Jelco Easy VTA on the Fly

stringreen

... as you raise the rear end of the arm, you are decreasing the vtf ...

No, that would increase VTF, not decrease it.

noromance

Any idea what difference in VTF occurs for every millimetre of change to VTA?

You’d need more information to calculate this, including the weight and length of the arm. But it’s an easy thing to measure with a good VTF gauge.

@cleeds Dang, I was hoping there was a formula or someone else knew!

Cleeds....not on MY arm it doesn't...  The tracking force is decreased when the rear of the arm is raised.  My cartridge sounds best at a particular vtf...to dial it in you have to listen and adjust.  Because I have the 2nd pivot attached, the azimuth doesn't change, but all those who have a unipivot, the azimuth will change as well.  It might take a month or more of diddling until satisfaction (but never assurance) kicks in.

stringreen

The tracking force is decreased when the rear of the arm is raised.

Hmmm, I’m not sure how your arm could have circumvented the physics and geometry that apply to other arms. Does your pickup arm rely on some unusual dynamic VTF mechanism???

With my Jelco or Jelco-OEM arms the performances of the
"Easy-VTA" and the "Ammonite" mounting collars are very
close to identical.
In both cases the sound is slightly more "solid" than with
the original one.

Due to the fact that I change from time to time the headshell/
cartridge-combos the "Easy-VTA" of course has a comfort
advantage if the height of the cartridges differs.