Happy new year to everyone.
Ages ago I replaced the entire arm mounting block and with it the VTA arc slider.
At that time I did not have the machining capability to replicate the arc in my design. So I did not copy that feature. I wasn’t too worried about this however because it is useful only if you play records on the same thickness and adjust VTA with them.
Try a little trig..... Set up the arm with the wand parallel to the record surface and the arc at its deepest point. Now raise or lower the manifold using the VTA adjust leaver. As designed the stylus will land at the same place regardless of manifold travel up or down. Brilliant.
Now use say a thicker record. With the same set up as before, the wand is parallel to the record surface at a point where the arc is not at its deepest. This has had the effect of moving the stylus landing point forward in the direction of record rotation. The stylus landing point now moves backwards and forwards as VTA is changed.
Making the slider straight means that for a given VTA the stylus lands at the same place regardless of record thickness. With an arced slider we land at the same place regardless of VTA but only with the record thickness that the arm was set up for..
Cheers
Ages ago I replaced the entire arm mounting block and with it the VTA arc slider.
At that time I did not have the machining capability to replicate the arc in my design. So I did not copy that feature. I wasn’t too worried about this however because it is useful only if you play records on the same thickness and adjust VTA with them.
Try a little trig..... Set up the arm with the wand parallel to the record surface and the arc at its deepest point. Now raise or lower the manifold using the VTA adjust leaver. As designed the stylus will land at the same place regardless of manifold travel up or down. Brilliant.
Now use say a thicker record. With the same set up as before, the wand is parallel to the record surface at a point where the arc is not at its deepest. This has had the effect of moving the stylus landing point forward in the direction of record rotation. The stylus landing point now moves backwards and forwards as VTA is changed.
Making the slider straight means that for a given VTA the stylus lands at the same place regardless of record thickness. With an arced slider we land at the same place regardless of VTA but only with the record thickness that the arm was set up for..
Cheers