Jelco Easy VTA on the Fly

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

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???