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 15 responses by ct0517

Dear Raul - $500 for a properly functioning SP-10MKII (with PS) ?

I will be sure to contact you the next time I buy one.

For the SP10MKII the following public data is published.

Speed fluctuation by load changes: 0% within 5kg-cm.

Can someone technical explain to me what "5kg - cm" really means in laymans terms. Can I really put that much weight in that area and it will stay accurate ?

D, Syntax, Thuchan - Did or do any current BD TT manufactures publish accuracy values ?

I would think that for someone interested in a high end platter/motor setup these types of figures attract the customer.

Like when buying a car.

0 - 100km in 4.5 seconds. :^)

As a customer without ever hearing it - the published numbers are what got me curious in the first place about an SP10mkII.

Cheers
Revision - apologies - my question about "BD" data should be revised to Belt Drive, String Drive, Thread Drive, VHS Tape Drive, Beta Tape drive, Dental Floss Drive, ... fill in the next one.

... and is open to anyone to respond if you have any real info.

Whatever turns you on as long as you are having fun and have a sense of humor.

When I go to listen to a TT or any audio system I ask the owner to sing me one minute of their favourite song. Its amazing how many really $$$ systems have owners that can not carry a tune.

Well IMO - this thread is about a TT platter/motor being able to do its part in carrying a tune - its the foundation half. The other half is the tonearm/cartridge. A "really" good tonearm will make a cheap cartridge sound really good. Again IMO.


Cheers
Syntax, you and a few other here own and get to listen to some very nice toys.

When I stop learning this vinyl stuff will no longer be a hobby for me.

FWIW - if anyone wants to know if I can carry a tune please email me - I will send back my phone number. You can call me and I will sing you a song (unplugged).

:^)
Hi Lew - thx for putting my question in layman terms :^)

Syntax - Look forward to your impressiosn of the Sirius. I would be curious as well if you can find out who set the arm up for the owner. i.e. the manufacturer, the owner or a friend ?

Cheers
Hi Unoear - so the Sirius is yours :^)
I have never seen one let alone heard one.
If I owned one I would never sell it - even if it meant my two 17 years olds had to pay for their own university.
FWIW - My earlier comment came from reading past posts here by members who have heard it and actually complained about some part of its sonics.
Sounds unbelievable to me. I can only assume the setup (most likely the arm?) must not have been optimal.
Cheers
Dear Geoch
A pleasure to do so.
Again thank you so much for the recommendation on the Lenco 75. :^)

Please let me know if I ever have the permission to post a pic for the inspiration behind my symposium experiment.

I will call it INSPIRATION.

The people here at Agon would love to see it.

Nikola I am sorry for making you look at this tonearm.
I understand you are not allowed to buy it based on your principals. I respect u for that.

Geoch’s TT
Henry - I want to see a youtube of the 3 cartridges lowered onto the record at the same time. :>)
Excellent video production Henry ! Your accent doesn't come through in the posts here. :^)

My American and UK co-workers tell me Canadians have strong accents too but I don't believe them - eh ?

I think this Utube stuff opens opportunities here for everyone and the gear.

Would love to see more of you out there with your wonderful gear.

Thuchan - how about a video demonstrating your favourite audio toy – you could speak Japanese too.

Wonder what Raul sounds like?

How about a 3 minute utube video Raul demonstrating your tonearm features to us ?

Technology awaits. All in fun

Frogman - I agree with you.
Tony – great info

Cheers Chris
Ha Ha Ha - yes sure dialect. Its wonderful either way Henry :^)
And music is the common language here.

ACCENT vs DIALECT

NEUTRALITY vs COLORATIONS

What a great hobby
Hi Lew - do u have a center weight with a flat top ? Bit of blue tac on the bottom of the Timeline and place it on top of it maybe? Yes that Lenco has a really fat spindle.

I am not familiar with the WMC - thanx for explanation. I have experimented with my SDS and my Lenco in the past - reason for my post. thx
I don't like to post without actual direct experience but here goes.

Based on my TT's and what I am "hearing" and also not owning this Timeline device.

A Belt/string or idler will do one of two things on a timeline over time.

If they are slow

<----------------

If they are fast

---------------->

A direct drive because of the nature of how the motor works goes back and forth.

The DD's can not be picked up by the timeline.

The stop - go, stop - go, stop - go, nature of the DD motor keeping speed.

The DD is only at a correct 33.3 “in transition” between the time the motor kicks in to speed up and shuts off to slow down. At all other times it is not at 33.3.

Am I wrong ?

And another thing. I am going to say a really dirty word here to some people – CD

Has anyone bothered to listen to a decent CD of your favourite music compared to LP as far as "pitch" is concerned.

I think you will be surprised.

Anybody?

Finally a message to SKSOS1 - is it your intention to have another thread shutdown ?

What is Sounds of Silence that you are affiliated with. You seem to be anything but silent. Please take Lew's advice.

Cheers
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
Hi Lew - regarding the Lenco l75. Can you please do the testing with and without the Walker motor controller. I realize setting the motor speed with the original slider is a bit of a pain. Am very interested in your impressions findings between the two.
Cheers
Hi Henry
I just re-read what you wrote. I am assuming when you say

“ In this.....a belt or thread drive is at a severe disadvantage”

that this is your opinion only.

Have you heard a string drive TT that was designed by its manufacturer for the use of string ?

Cheers Chris
Hi Dev - just curious regarding the sp10 mkII that you tested. You said

"I tried it on a "DD" SP10 MK2 and it was off"

What was the strobe doing while you tested it? I have a seen a strobe on a SP10MkII one time "waver" back and forth - it could also be heard in the music. It needed adjustment. How steady was the strobe light in this case.

Cheers