What's the format for the .txt file?
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Fun with vinyl measurements
- Thread starter Balle Clorin
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OP
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see attachement.... a shaknspin clone. I used excel to make 33 rpm data, and word unformatted to change csv export from excel "," to ";" to notepad text file *.txt to run. intervals are 10ms not 2ms,..
I just copied the time;rpm data into a existing shakspin file, and saved as csv, and edited from , to ; in word and copied til notepad shanskpin "master"..
I just copied the time;rpm data into a existing shakspin file, and saved as csv, and edited from , to ; in word and copied til notepad shanskpin "master"..
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OP
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Congratulations!! You have a great TT there. Will be interesting if you transplant data into the W&F web app..
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OP
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Leave them unchanged.i think the app ignores them. The app expect “;” and do not accept “,” separator. I edit csv file in Excel . I can send you my excel file by mail if you wish
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I FORGOT to tell you to set the time to 10 ms intervals from zero, as in the attached file
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I have a 0.6 periodic variation...likely platter related, and the observed flutter elements maybe are from the test record more than from the belt drive..
I think AI have som truth here..
I think AI have som truth here..
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OP
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A flashback to Merolemez crosstalk.did it since I realigned the tonearm/cart to match Yosh commente on SME effective length. https://www7a.biglobe.ne.jp/~yosh/armdata.htm
. I basically moved the arm 1-2mm forward (more overhang and realigned Bearwald style), VTA changed 2mm
Cartridge is AT OC9MLii, 130 hours
. I basically moved the arm 1-2mm forward (more overhang and realigned Bearwald style), VTA changed 2mm
Cartridge is AT OC9MLii, 130 hours
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morillon
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Near somes 41/41db found with old at-155/160 with merolemez too
;-)
OP
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You were lucky with that Tacet, and luck with that belt. My old belt are also superior to new belts.
I wonder what the differences are but I guess precision in dimensions or compliance along the belt are factors. A flat belt climbs a crowned pulley to the highest position, and if the belt has the slightest curvature, it will cause small belt oscillation on the crowned pulley. This is due to the physics of the belt-crowned pulley interaction. Another thing is that the inner platter and the pulley axes must be parallel, but that only causes a permanent shift of the belt on the pulley and should not affect oscillating wandering. Another thing that could cause oscillation is that the pulley or inner platter axes are slightly skewed.
Given the results with different belts (3 year old Linn belt, new Linn belt and Thakker belt), it is probably the belt precision that is the root cause to oscillation and the 0.5 Hz harmonics. I've seen other third party belts that I could try, much cheaper than the original Linn belt.
Given the results with different belts (3 year old Linn belt, new Linn belt and Thakker belt), it is probably the belt precision that is the root cause to oscillation and the 0.5 Hz harmonics. I've seen other third party belts that I could try, much cheaper than the original Linn belt.
I've checked both the new Linn belt and the Thakker belt by turning the belt around in circles lying on a table. It is obvious that the belts have stiffer and softer parts; the Linn belt has one part which is stiffer than the rest, while the Thakker belt almost wants to be in a square shape rather than a round shape. I wonder it there is anyway to restore them to more even softness. I've read things as boiling, vinegar treatment, light sanding of the belts, and wintergreen oil + IPA.
Anyone knows what is the truth here? Belts are not old or cracked, just showing very different softness along different parts of the belt.
Anyone knows what is the truth here? Belts are not old or cracked, just showing very different softness along different parts of the belt.
Maybe I read somewhere about boiling belts to even the internal stresses? Maybe not. This reminds me why sold my 401 and 301.
I suspect that the belts coming in the small plastic bags has taken a bit of the form they been stored in the bags. I boiled some water now and soaked one belt in it for 10 min. I've put in on the record player that will go on overnight.
Yes, belt drives are a pain, but as long as my Axis lives I will not buy a new TT. Maybe boiling can work, maybe not, but anyway a piece of useful info no matter what.
Maybe something to think about as well: the old Linn belt I bought 3 years ago was just stored lying in a circle in a drawer at the dealer and not in those small plastic bags.
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Jimi Floyd
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Sorry, where can I find the W&F web app? thank you!
W&F Analyzer
myhi.fi
Still a work in progress... https://www.audiosciencereview.com/forum/index.php?threads/the-w-f-analyzer-project-uberrimus.70099/
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