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AC, DC Motor Noise
Actually, I have an industrial air bearing where the attached motor shares the main air bearing and doesn’t have any metal to metal (or synthetic liner) contact. I’m not sure what this bearing was originally manufactured for - possibly the production of hard discs for computer drives...- YNWaN
- Post #18
- Forum: Turntables
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AC, DC Motor Noise
There are quiet AC Synchronous and noisy ones, the same with DC. In addition, how they are implemented makes a difference. In my own deck I use an AC synchronous and no noise at all can be heard even with your head close to the motor. Similarly, if a stethoscope is used on the chassis, armboard...- YNWaN
- Post #14
- Forum: Turntables
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The necessity for absolute tt speed control
A valid point but I could argue the same with equal validity. Essentially your argument boils down to me not having your experience, but nor do you have mine. Anyway, if it is down to one persons opinion being worth more than another’s I will bow out now and leave the thread to you and others.- YNWaN
- Post #274
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
But I would argue that that is ultimately because the motor should be the master (not inherently but because it is active and it is difficult for the passive to override the active) and, in the case you cite, the flywheel is overcoming the dominance of the platter. The same could be achieved, in...- YNWaN
- Post #272
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
but its not enough to say the flywheel is ‘heavy’, it has to be considered relative to the gearing and the mass of the platter. Ultimately the question is what is driving what and which is the master - the motor or the platter, or flywheel. In many cases the interaction is not at all clear and...- YNWaN
- Post #270
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
No, not as such. I did theorise the idea many years ago but subsequent (unexpected - when I was looking into stylus drag) findings caused the balance of importance to change and so further investigation was abandoned. However, having looked at subsequent implementations I would say that many...- YNWaN
- Post #268
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
The problem with the opinions expressed on forums (in general, not specifically this one) is that they are inherently based on people’s experience with owning whole products. By that I mean they are unable to separate the motor from the rest of the turntable, or if they are, it has other...- YNWaN
- Post #266
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
Oh yes, I completely agree. I should have included pulley diameter and also suspension compliance but I was aiming for brevity. The whole is a system and ignorance of one can undo the whole. People (even manufacturers - or their marketing departments) concentrate on the obvious which is the...- YNWaN
- Post #265
- Forum: General Analog Audio Forum
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The necessity for absolute tt speed control
I’ve experimented quite a bit, over the years, with different motor options. All of the are, IMO, a delicate balance of compromises that they all share. In addition, there is an interaction between bearing drag and platter mass (effective or actual). For me, the best result I have achieved is a...- YNWaN
- Post #263
- Forum: General Analog Audio Forum
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What turntables do you use? Pictures would be nice as well :-)
It actually looks more like an ARO than it really is - if that makes sense? Sound wise I would say it a significant improvement on the ARO.- YNWaN
- Post #538
- Forum: Turntables
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What turntables do you use? Pictures would be nice as well :-)
I designed and built the turntable - the result of many years experimentation. You are quite right that the arm is a Naim ARO but the photo is a little out of date in that I now use the (similar looking) Tigerpaw Javelin - the armboard and record clamp are now different too.- YNWaN
- Post #536
- Forum: Turntables
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What turntables do you use? Pictures would be nice as well :-)
Many thanks - much appreciated :).- YNWaN
- Post #534
- Forum: Turntables
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