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Turntable speed stabilty
Turntable speed stabilty
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Old 28th May 2018, 01:56 PM   #1081
Hiten is offline Hiten  India
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Thanks Volken. Always wanted to see measurements of Classic Vintage Turntable. How to interpret the graphs ? I presume the test track was 3K and narrower the band the more stable the speed. Right ? Original Thorens had wow and flutter measurements was 0.05%. It would be wonderfull to see Garrrads and Lencos measurements.
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Old 28th May 2018, 03:14 PM   #1082
JP is offline JP  United States
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Interesting. On the polar for the MK3 there's a speed variation at 45 and 315 deg that corresponds with a noise I can barely hear at the motor - I suspect a bearing issue. I've four other MK3 I can measure so we can increase the sample pool there. Still, the R looks remarkably good.
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Old 28th May 2018, 05:30 PM   #1083
volken is offline volken  Netherlands
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Quote:
Originally Posted by Hiten View Post
Thanks Volken. Always wanted to see measurements of Classic Vintage Turntable. How to interpret the graphs ? I presume the test track was 3K and narrower the band the more stable the speed. Right ? Original Thorens had wow and flutter measurements was 0.05%. It would be wonderfull to see Garrrads and Lencos measurements.
Regards.
Yes A 3khz testrecord with FM sidebands first tonearm/cart freq. second motor rotational speed , then belt flutter and the cursor at 100hz motor vibration.The sharp peak is a indication for speed stability very low wow fig.
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Old 28th May 2018, 05:53 PM   #1084
Dave Cawley is offline Dave Cawley  United Kingdom
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When I attended the press briefing, they went on endlessly about noise floor and bearings. I wasn't convinced entirley but coupled with the review by HiFi News at http://www.soundhifi.com/images/HiFi...R%20review.pdf maybe the were dead right ?
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Old 29th May 2018, 11:37 AM   #1085
Hiten is offline Hiten  India
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Originally Posted by volken View Post
Yes A 3khz testrecord with FM sidebands first tonearm/cart freq. second motor rotational speed , then belt flutter and the cursor at 100hz motor vibration.The sharp peak is a indication for speed stability very low wow fig.
Thanks and regards.
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Old 2nd June 2018, 06:04 PM   #1086
JP is offline JP  United States
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Here's a different MK3:

Dropbox - sp10mk3-2-wf-sa7.wav
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File Type: png sp10mk3-2-wf-sa7.png (226.5 KB, 57 views)
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