Turntable speed accuracy

So what are the issues with this method?

I kept hopping someone else would chime in. I have the Feickert App and the Feickert LP but also have the new Quality LP from Chad (Ultimate Analog Test LP, track 10) that both work with Fozgometer.

Test result is different with each test record and I don't want to get into multiple page (guessing game) explanation as to why.

The Timeline shows what's happening very easily and quickly with minimal hassle. I'll continue to test but the results with iPhone are dubious.

Clarification of my post (above).

I bought the Ultimate Analog Test LP for the Fozgometer and found track 10 worked with the Feickert iPhone App.

Both it and Feickert test disc have the steady state 3150 HZ test tone.

I have checked my VOM with the Rives test CD and it reads +_ 1 hz at frequescies from 1000 to 3150 hz, so I think I will buy the Ultimate Analog Test LP to cross-check my strobe disk. I also happen to have an old dual trace scope, so I should also be able to set azimuth from the same diak. No often I can "kill 2 birds" with $40.

SME30/12

Here is a video of the SME 30/12 with the Sutherland TimeLine. The only other videos that I have seen with the TimeLine are Halcro's Victor TT and the Sutherland website.

Hi Peter,
Excellent. First, that is a really long tonearm. I'm not envious, just impressed. I noticed just a slight amount of drift over the 5.2 minutes of the song. It appears the speed is just a little fast by about 1.6%. I estimated that the line drifted about 1 inch over the 5.2 minutes and I also estimated the radius from the timeline center to the album cover to be 10 inches. So, if I did the math right, the angle changed 5.7 degrees over 5.2 minutes. If you have exact numbers then the calculations would be more meaningful. That means the number of record rotations was off just 2.8 rotations out of 173.33 rotations. Are you able to adjust the speed a bit? At the end it seemed like the line did not shift when you lifted the tonearm. Is that what you saw? Is your speed controller closed loop? When you dropped the tonearm onto the record did you see any shift in the line?