Discuss The Viv Lab Rigid Arm

Hey Lew.... Great job!

Have you seen any mention in the documentation on where they want the null point to be placed?  My guess is 2/3 to 3/4 the way to the leadout is a good start.

dave

It’s based on the mounting template provided. IIRC the null point ends up about mid way across the playing surface but I’d have to check.

please check.

if you can trust the math it seems that putting the null at around 72-75mm will net the best overall compromise.  Below is what 72mm looks like compared ot 99mm and a typical Lofgren A.

dave

I think the whole point is that minimizing TAE is not so critical or rather that minimizing skating force is more important. But I will measure the template and see exactly where the null is in mm from spindle.

OK. I just measured from the center of the hole in the template for the spindle to the center of the much smaller hole in the template for the stylus tip, using a Matatuyo caliper, 89.7mm

@lewm, 

Straight underhung arms still skate, one way or the other depending on where they are on the record. The only arms that do not skate are straight tangential trackers. The problem is there are currently no straight line trackers that do not have substantial issues. 

The fact that the Viv are sounds satisfactory to many people is an enigma as the distortion is substantial. Maybe we are not sensitive to that type of distortion. I applaud you for your curiosity and willingness to spend money on a device that might not work out. It is how you learn.