Tycker om trådrubriken. Känns bekant på något sätt.
Kul!
Men det här med vacumsugning?
Är det att prioritera rätt?
Finns det inte viktigare prioriteringar?
Jag tror på KISS
Saxar ur lennartj länk:
Automodulation Distortion
The turntable designer might instead try to deliberately use a very weak motor, with very weak kicks. But that still doesn't solve the above compromise dilemma (he'd still have to move to a lighter platter, if he wants reasonable startup times). And it also creates a new problem, relating to automodulation distortion.
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In sum, when the music gets loud, the larger side to side groove modulations become more nearly perpendicular to the stylus' steady travel along the time axis direction of the groove. The groove wall has acquired a vector component that effectively collides with the stylus, instead of gliding along parallel to it. Along this time axis direction, the stylus position is fixed, so it is the groove wall that loses in this collision, and the groove (hence turntable) slows down in the time axis direction.
This means, quite simply, that loud music slows down your turntable.
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How can the turntable designer keep the platter from slowing down every time the music gets louder, thus causing FM automodulation distortion? The only available tactic is to make the platter heavy, with a large moment of inertia, so that its large angular momentum tends to keep the groove going at a constant speed along the time axis. But this then implies that the turntable must have a relatively powerful motor with relatively fast response, in order to adequately power a heavy platter, and in order to restore its speed losses due to stylus drag within the same fast time frame that music's louder transients occur.
And this in turn means that one whole turntable design approach, weak motor with light platter, is ruled out. This design approach might be one way to address the multipole kick and coast problem, but it cannot adequately address this new problem of automodulation distortion.
So that puts us back with a heavy platter, a powerful motor, and a relatively fast motor response. But this also puts us squarely back into the dilemma of the multipole kick and coast problem. As soon as we make the platter heavy enough to avoid automodulation distortion, then we also have to make the motor powerful enough so that the periodic pulses of its kicks will be felt.
Fast nu vill jag ifrågasätta artikelförfattaren.
-Man kan mycket väl ha en mycket tung "platter" och driva den med en "weak motor"
Nottingham Dais väger 20 kg och drivs av en mycket svag motor.
Komorok, kan du fräsa en sten så exakt så den kan funka i denna appliktion?
Svåra tekniska lösningar är väl ballt men jag tror att det också kan ge en hel del huvudvärk.
Om man inte tror på en sådan svänghjul, som används i en Dais, kan upprätthålla en stadig gång kanske Clearaudio har svaret i en för mig mycket komplicerad lösning, fast vad vet jag?:
OSC.
http://www.musicalsurroundings.com/clea ... _tech.htmlI CAN´T THINK.... ..... OF ANYTHING BOW LP2
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