Platterspeed app using Feickert test disk shows my LP12 now at +0.11% speed error, not much, but not as good as the +0.02% it had been a few years ago. But still very tiny. I had figured the new much improved suspension alignment would make a slight difference, and it did. But it would probably be pretty hard to see the error with a strobe disc.
Linn LP12 specification is 0.03% accuracy. It can be made that good, or even better, if you adjust the motor screws well enough to get the pulley tilt just right. The synchronous motor is controlled by a very accurate oscillator in the Valhalla board.
1000 Hz reads as 1001.1 Hz, with raw -.31% to +.19%. Which means if you looked at any tiny bit, it might go in the other direction, you have to get a long term average to see the 0.11% fast.
Wow and Flutter reads 0.009% using two different standards. That's better than the specs of many top turntables.
Update: I see now that measurements may be even more accurate with the 3150 Hz test. This shows an average speed of 3153.9, which is a 0.13% error. The two wow measurments are 0.14% and 0.12%, still within the specs of the better turntables (the best are often spec'd at 0.15% if there is any spec at all). The raw speed deviations are -0.47% and +0.38%.
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