Tobes,
If I'm reading your post correctly, I'm actually confused on this issue. My understanding is that the SDS allows you to adjust the current frequency so as to obtain a correct platter speed, but what that "correct" frequency is is itself dependent upon the stability and frequency of the power supply in your wall. Since the frequency in your wall current fluctuates, you might have to adjust the output frequency on the SDS to get the platter spin dead on from time to time. I agree that if your wall current is relatively stable, once you find at what frequency your turntable reaches the most accurate speed, you might not have to adjust the SDS often, but since the current does fluctuate in most homes, occasional adjustments might be necessary. In my experience, I get the platter on my Classic dead on for 33.3 at 59.95 Hz, but have gone over 60 Hz a few times.
If the SDS knew precisely what frequency to feed to the table based on the current going into it, it seems there would be no need to have the function to adjust it on the unit.
If I'm reading your post correctly, I'm actually confused on this issue. My understanding is that the SDS allows you to adjust the current frequency so as to obtain a correct platter speed, but what that "correct" frequency is is itself dependent upon the stability and frequency of the power supply in your wall. Since the frequency in your wall current fluctuates, you might have to adjust the output frequency on the SDS to get the platter spin dead on from time to time. I agree that if your wall current is relatively stable, once you find at what frequency your turntable reaches the most accurate speed, you might not have to adjust the SDS often, but since the current does fluctuate in most homes, occasional adjustments might be necessary. In my experience, I get the platter on my Classic dead on for 33.3 at 59.95 Hz, but have gone over 60 Hz a few times.
If the SDS knew precisely what frequency to feed to the table based on the current going into it, it seems there would be no need to have the function to adjust it on the unit.