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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

Showing 7 responses by sksos1

sksos1
387 posts
 
I'm sure because TTWeights places many ads here on Agon they had a BIG say in why the thread was closed. My own search for a table that has spot on accuracy still continues......
sksos1
387 posts
 
Lewm ~ you don't happen to own a TTWeights table? I've now checked 2 TTWeights tables and both show inaccuracies via the Timeline, would like to have confirmed a third and then can surely say its a design fault!
Looking forward to your findings.
sksos1
387 posts
 
Tony ~ I'd be happy with what you propose BUT what I see currently with the TTWeights table is that the line moves EVERY rotation which to me is just unacceptable.
sksos1
387 posts
 
Got a Brinkmann Bardo in to test drive and upon first listen the pitch of the piano was off, attacks were not sharp, so checking the speed with the Timeline showed it running a tad slow. It's easy to adjust and within 3 minutes had it spot on. This is how a turntable should be, doesn't seem that hard to get it right.
(Dealer disclaimer but not a dealer for Brinkmann..........yet!)
sksos1
387 posts
 
Was invited to have a listen to 2 audio systems and did bring the Timeline with me just to see how other tables faired. The first was a modified Technics SP10 MKII (I believe) with the plinth from Albert Porter and the Timeline did not waiver one bit. The other was an SME10 and here the Timeline showed the table running fast, unfortunatelty we the SME does not have pots to adjust the speed. Could we hear this effect on the SME? There were 4 of us listening and to be honest no but it would have been nice if we could have adjusted the speed to be dead on and then hear what we thought.
Just some more data points for all to think about.
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)
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.
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