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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
ct0517's avatar
ct0517
1,798 posts
 
Henry - my post was not an assessment of the DD technology as you know.

It was strictly my theory based solely on what I have heard/read here about this timeline and how I think either of my Technics SP10 MKII's would do up against it.

Speed corrections are made very quickly with my SP10's - I do not think they would therefore register with the device. If someone in my area wants to lend me a timeline I will try it as well.

The SP10 MKII's are both "very" accurate as far as maintaining speed is concerned.

Cheers
lewm
6,770 posts
 
I've got the Timeline in house.
On the Lenco, with AC supplied through the Walker Motor Controller, speed set by the KAB with an LP in play, and listening tests suggesting that rhythm and pitch are like real life, the Timeline says my Lenco is a touch fast. I will need another day to determine whether it is "regularly" fast (the error increases in a linear fashion with each revolution) or "irregularly" fast (the error is haphazard in magnitude per revolution). The first kind of error can be "fixed", if I care to do so. The second kind indicates that the Lenco is affected by stylus drag. Not so easy to fix. One red herring: the LP is sitting on a Boston Audio Mat1, which is kind of slippery; the LP itself could be sliding due to stylus drag. I hate when that happens. I hate record weights.
halcro's avatar
halcro
2,289 posts
 
Halcro have you tried the timeline with your TT81?
Unfortunately I didn't have the Timeline when I had the TT-81 set-up.
Now it is too much of a hassle to remove the TT-101..... Install the TT-81....and then re-install the TT-81? Sorry :^)
halcro's avatar
halcro
2,289 posts
 
One red herring: the LP is sitting on a Boston Audio Mat1, which is kind of slippery; the LP itself could be sliding due to stylus drag. I hate when that happens. I hate record weights.
Lew.......please remove the mat. Slippage can be a real problem?
ecir38
155 posts
 
Thanks Halcro, was just wondering by chance. Dang Lew that was fast, look forward to future comments you may have.

Have our monthly club meeting this week, have to ask the guys if anyone has a timeline. If not might have to break down just for kicks since I am love tools of the trad :).
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