Το ξαναδιαβάζω μετά από χρόνια και το ποστάρω ,γιατί αφορά το sl..αν κουράζω ,ξέρετε.. delete!!
O κ.Νoel Keynwood απαντώντας σε κάποιον Garnet ,Νοεμβρη του 2007 τεύχος 17 vol 09:
Can i make yoy small technical observations here?When measuring Wow and Flutter,it's difficult to get much below 0,05% using a test disc,as the disc will posses intrinsic wow and flatter from the cutting lathe.So as you get to low values it is difficult to know whether it's the turntable or the lathe being measured (!!!).
Also,disc eccentricity ,from a hole punched slightlyoff-centre,dominates unweighted wow,so disc centring is vital.This can be minimised by using Weighted W & F values,which can go low.All the same,the many quality direct drives i have measured consistently return better figures than belt drive.
The motor servo feedback system was the part under suspicion on DD,some suggesting they 'hunted' producing higher rate and more audible speed change effects than the low rate wow of belt driver....the bottom line as far as i was concerned was that direct drives sounded TEMPORALLY TIGHT and CONTROLLED,superior speed stability was audibly apparent to me.
BUT IF PEOPLE PREFERRED the (slightly) temporally vaguer delivery of belt drive ,witrh its often undeniably clean midband,so be it.
Το βάζω καθαρά για πληροφορία σχετιζόμενη με τα sl,αν είναι άχρηστο πληροφοριακά....bin.
