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Turntable speed accuracy

There is another thread (about the NVS table) which has a subordinate discussion about turntable speed accuracy and different methods of checking. Some suggest using the Timeline laser, others use a strobe disk.

I assume everyone agrees that speed accuracy is of utmost importance. What is the best way to verify results? What is the most speed-accurate drive method? And is speed accuracy really the most important consideration for proper turntable design or are there some compromises with certain drive types that make others still viable?
peterayer
sksos1
387 posts
 
Lewm ~ I have the TTWeights rim drive and the Timeline shows it does not have speed stability, this on 2 different TTWeights rim drive models. Does it sound OK? Yes but when I now listen to a DD table I can clearly hear the difference.
(dealer disclaimer)
lewm
13,049 posts
 
Dear Skos, You are preaching to the converted. I am a confirmed DD junkie. I still do like my highly modified Lenco, however. I was unable to test it with the Timeline, because the spindle hole in the Timeline is too small to admit the spindle of a Lenco (or of my Kenwood L07D). This to me is a major oversight in the design of the Timeline, as I think it would have been easy to supply alternative spindle hole pieces for it, especially at the price. (I could imagine a removable rim-threaded bottom puck; three such pucks could accommodate all typical spindle diameters, with a snug fit.)

I think I remember your earlier posts on the TT Weights. It appears that their drive wheel and the rim of the platter have been re-engineered in their latest models or their revised older models. Perhaps those issues were resolved.
sksos1
387 posts
 
Lewn ~ a customer of mine has the TTWeights upgraded player with the new extended rim and still the Timeline showed it was unstable. Can he hear it? No but it didn't make him fell all warm and fuzzy.
lewm
13,049 posts
 
God never meant for audiophiles to have a warm and fuzzy moment. If an audiophile is not worried at any given moment, he is compelled to search for something to worry about. Enter, the Timeline.
dinster
76 posts
 
I notice very few, if anyone, is using a test tone and measuring frequency, as a means of setting TT speed. My limited experience is that the KAB disc is pretty insensitive, I have an AC motor and so the KAB disc shows perfect speed, however the 3150 test tone measured with the Feickert App, shows fluctuations of up to 5 Hz from a mean of 3150, after I have adjusted the power supply. The test tone takes stylus drag into account. So what are the issues with this method?
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