[78-L] 78-L Digest, Vol 64, Issue 17

[Dave Burnham]

I think it's a matter of what causes the skating. As I've said elsewhere, I don't believe it has anything to do with centrifugal or centripetal forces;  my mind accepts the notion that it is caused by the fact that the outer groove wall is travelling faster than the inside groove wall, tending to push the stylus towards the centre. I've never seen this theory in writing but if it's true, it means skating forces will be much higher on a 78 with a larger stylus and hence a higher speed differential between the groove walls. Also if this theory has merit, it doesn't matter which direction the turntable is spinning. 

I remember that there was a theory back in the '60s that the most accurate way to set anti-skate was to put the arm on a blank disc, (I found that a blank Columbia 78 side was the smoothest), and adjust the anti-skate control so the arm didn't move either towards or away from the spindle. I don't believe this actually worked because I think skating forces are created by the actual groove, not a flat surface. 

db

Sent from my iPhone

> On Jan 14, 2014, at 7:12 PM, Doug Pomeroy <audiofixer at verizon.net> wrote:
> 
> e on the spindle side) more than the right