for the Audiosilente idler wheel.
Not sure where the $365.00 is from.
I never got around to the AF review mostly because I wasn't blown away by the difference. Replacing the AS with the AF brought some additional weight and blackness to the soundscape - a good thing and worth the expense of $400 shipped.
The AS gives 90% of the AF. I can recommend the AS 100% and I believe AudioGrail now fit them on refurbished Garrards.
Note that I had to sandpaper the spindle shaft thickness to get the AF to fit while the AS fit exactly from the box. (AF Chris provided detailed instructions on this by immediate email so not a biggie)
I wasn’t thinking that the heavier idler wheel would actually affect average platter speed. I was thinking that a lighter idler wheel would make the response time more rapid. By which I refer to the response to stylus drag or bearing friction or other factors that might put a drag on the platter. Because the motor only has to motivate the platter. Maybe The weight of the idler wheel or its moment of inertia is analogous to the compliance of a belt in a belt drive turntable. A belt with low compliance would be like a very light idler wheel.
Thank you all for your comments.
Can anyone conform that the dynamics improved with either the AS or AF?
I remember when I heard a Garrard 301 where the owner had machined their own idler wheel. It was one piece and he commented that the wheel was ever so slightly smaller (diameter) so as the contact with the platter had more 'sensitivity' that created more dynamics. Does that make sense to anyone? Or maybe I'm confused.
I think that the machinist who made the idler said that he had reduced the 'pressure' between the wheel and the platter. He found that this allowed more dynamics. I guess the platter was not so 'rigid' in its lateral spinning motion so that the needle moved with greater amplitude.
Does that make sense to anyone or I am way off track myself?
If the idler wheel is normally say 2" in diameter, and there is no allowance for the idler to move closer to the platter if it is reduced in diameter by say one millimeter, it will exert less force on the inner platter contact point.
What effect does that force have? Maybe additional damping causing a loss in information or conversely ringing making it appear there are better dynamics? Perhaps the additional pressure exerts an asymmetric force on the bearing and it’s reduction reduces the transmission of bearing noise.
If you know how to take the motor apart to lube the lower bearing, it can’t hurt having a replacement bearing on hand. If the table is used and new to you, figure on doing the above as a matter of essential maintenance.
The most difficult and real PITA bearing in the 301/401 is the lower idler bearing. Be real careful working on it when you swap the new AS in. If the lower spindle is wobbling in the bushing, you will have real bad sound. Replacing the bushing requires some skill and tooling.
Thank you for your recommendaiton.
The AS idler wheel arrived today. I have installed it and seems to make a slight 'whirr sound' but it sounds great. Especially. in the mid range. Also more dramatic/faster articulations/dynamics.
I haven't installed the bushes. It looks tricky. The existing upper bushing is firmly in place and I'm not sure how to remove it without some pressure. Is there are good way to do this or does it normally come out easily?
May be there is some tutorial/ video available somewhere?
"90,00 EURO is approximately 101.00 US as of today.
@best-groove 2 different idlers. Audiosilente is less expensive aluminium. The Artisan Fidelity one is stainless steel and higher tolerances.
First above posters replies are severely misinformed. The third above poster noromance has it right, they are two completely different idler wheels of drastically different quality. The AudioSilente idler wheel is made from a much less expensive, lightweight aluminum and fitted with a basic flat rubber O-ring which runs in a machined channel at the outer lip. The Artisan Fidelity Garrard 301 (401) cnc machined idler wheel hub is made from stress relieved non-magnetic stainless steel, with a cnc ground center pin and permanently molded precision cnc ground outer rubber running surface. Higher tolerances + higher fundamental material part quality + rubber molded (non-O ring) precise ground periphery contact area = higher cost. They are not the identical parts and do not perform the same either. You only get what you pay for.
I'm glad someone else revived this thread. Up the thread, I wrote to Mozart: "Machining down the diameter of the idler would reduce platter speed." Xactaudio seemed to disagree with me. I am always ready and willing to learn if I made an error in abstract reasoning, which is entirely possible. I still think, all other things being equal, that an idler wheel of smaller diameter compared to original would cause the platter to travel a shorter distance for every revolution of the idler wheel. Hence, the platter speed would be reduced unless idler wheel rotational speed were to be increased accordingly with the reduction in its diameter. Am I wrong? If so, I still cannot see it.
Lew, idler wheel size does not impact speed. The ratio of pulley to platter is all that matters. The speed of the idler changes but the other two stay the same.That is correct. You need to also think about the relationship between the motor pulley and the smaller idler. The smaller idler will be spun faster by the motor. It all evens out and the platter speed is unchanged.