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In Reply to: RE: Hanss T10 running .3% too fast posted by joey1127 on June 22, 2024 at 17:53:15
additional pic of the wall wart supplied with the turntable.
Follow Ups:
What are you using to measure the speed? If its a phone app you really should not expect that degree of accuracy.
A 0.3% error is well within the accuracy expected for any turntable that does not have a speed adjustment.
The Wow & Flutter Speed App is very accurate. I used a REGA Strobe Scope + the strobe pattern on my living room table which is Quartz PLL and confirmed 33.3 then used the phone app and got the same results. When I check the Hanss table, it's saying 33.6 and it's actually fluttering between 33.5 and 33.6. This is noticeable when playing records as they sound slightly speed up. When I compare with a CD, the turntable is slightly ahead. I've had several Belt Drive tables over the years that had no issue running at 33.3 +/- .1 so I'm starting to think either the belt is bad, the power supply is bad...or the table is just a poor design with a not-so-good motor. It's pretty, but it's not running at the right speed.
No, it is your expectations that are a little optimistic!
A semitone requires about 1% shift in speed so 0.3% is inconsequential/inaudible unless you are specifically referencing it to CD. Even then you are assuming the cutting lathe was running at perfect speed and you are also assuming that (for an analogue source) that the tape was running at the correct speed at the time of cutting. You are presumably familiar with the speed anomaly of the stereo Kind Of Blue A-side compared to the mono cut?
You haven't mentioned if you "perfectly" centre your records? Almost without exception there will be SOME eccentricity and the eccentricity will be enough to cause audible wow on the right source material which generally exceeds the platter wow.
As I explained, the synchronous motor speed depends on the mains frequency and also to the load on the motor - this is why the motor is typically set slightly fast to account for the drag created by the stylus in the groove. Unless you are measuring mains frequency and factoring that in, it is completely unreasonable to compare the absolute speed with a CD. If you want absolute speed accuracy then stick to a CD. Wow is to be expected with a belt drive - again if you want low speed variations then you should stick to a DD turntable or CD.
Not even quartz lock DD turntables are "perfect". One review of the Technics SP10R had the speed measured at +0.12%.
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
...+.12% for that table is a flaw and it should be returned, not just accepted for what it is, a flawed/defective specimen.
I've sold this table to a local Hi-Fi shop so it's no longer a problem. I'm sticking with my DD which, per the strobe and phone app, is running at the correct speed AND matches up when referenced against an optical disc.
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