Measuring TT Speed

I have yet to see actual W&F measurements for a DD table that is any better than most other tables. Published W&F measurements from the manufacturer, sure.

I replied to the OP already but I thought I'd add a comment about the calculations for platter speed from the KAB USA website. Please correct me if I have this wrong, but the platter speed calculation didn't mention that when the platter is running slow you have to account for it by either using a negative error, i.e., [1 + (-count/360)] x RPM, or, subtracting the error, i.e., [1 - (count/3600)] x RPM.
Tom

Doh! That should be [1 + (-count/3600)] x RPM.

Lewm, I used a strobe for decades and whatever error is involved is is meaningless sonically. Watching your telephone spin has a hypnotic effect particularly after a few gummies.

Well guys thanks for all the replies with some help from above and you guys I have it sorted out now, thanks....