Tables That Feature Bearing Friction


I recently had the opportunity to audition the DPS turntable which, unlike most tables, has a certain amount of friction designed into the bearing. This, when paired with a high quality/high torque motor, is said to allow for greater speed stability--sort of like shifting to a lower gear when driving down a steep hill and allowing the engine to provide some breaking effect and thus greater vehicular stability. I am intrigued by this idea and was wondering what other people thought about this design approach. Are there other tables which use this bearing principal? One concern I have is that by introducing friction you may also be introducing noise. Comments?
128x128dodgealum
Dear friends: We are in a so imperfect home analog sound reproduction world with so low know-how that instead to use our main each day time to hear and enjoy music we are " loosing " our precious life time trying to correct that imperfect world that is full of imperfect hardware.
Rauliruegas (System | Threads | Answers)

Well said, now if you'll excuse me, I'm going to listen to some music for a few hours. Thanks for the inspiration Raul.
Out-of-center record hole. An important point. Still on holiday, but just a short note:
I solved that problem in my earlier design in 1992. Not with a complex motorized approach as Nakamichi did, but with a total mechanic approach - very simple and very effective. Everybody will find the solution himself following one simple hint:

- do decrease the diameter of the center spindle from approx. 7 mm to say 3-4 mm.

Now you have the option to adapt, with a small set of very simple - you can most likely even make it yourself at home - devices, to any excentricity of any given LP.
I will leave it to our "professional" TT designers to pick up the idea. Maybe the "german fraction" will find the solution in older reports about my old design. It was featured there.
Dear Dertonarm: I'm thinking in an automatic solution ( like the Nakamichi one, I don't mean the same. ) but I can see that will be not only complex/expensive but with some trade-offs on the whole TT performance so the manual/mechanic one could/can be a good alternative in the mid-time ( maybe the one that works with almost no compromise other that the customer has to do it, but the customer ( through a jig ) has to make too in manual way the tonearm instalation so that will be not " big deal ". ) waiting for an automatic self-design TT ( we have the right to dream about. ): it is an interesting challenge.

Regards and enjoy the music.
Raul.
Dear friends: I want to return a little about our analog imperfect world. It is imperfect because the " medium " is an imperfect one but the imperfections growing-up to fast on each link in the whole analog chain starting/begining with the recording sessions: choice of micros, choice of micro recording positions, choice of cables on those micros, choice of tape recording machine and the tape it self, reconding console, enginner whole priorities, choice of vynil material, choose of head-cutters, choice..., choice, choice, etc, etc

We don't have any control on the recording process and as you imagine in each link on that recording process the signal suffer a different kind of degradation, so when we " receive " that heavy degraded signal the best we can do ( in theory ) is to mantain it with no additional degradation ( impossible that this can happen. ).

There are so many places where the signal goes worst and worst due to its native imperfect " world " and it is not only that those different links made/makes a constant signal degradation but you can take the RIAA double process ( first one at the recording and the inverse one in the phono stage ) where the signal manipulation is to heavy.

Why I point out these facts ( and many other that exist. )?
Well, I think that we can do better if the designers/builder of audio items put on the market products that through an analisis of the real analog medium/customers needs can " cope " some of those imperfections, I mean that those audio items could help to the whole reproduction process trying not only add the less and lose the less but " understanding " things like : why we need that " perfect center " mechanism in TT? why we need neutral product quality performnce? why we need flat speaker electrical impedance? why we need extremly lower distortion figures on electronics? why we need lower output impedance on amplifiers?, why..., why... and why's.
We can take an example that almost no one cares about ( the why's ), today the LP industry are growing-up through new realeases and re-issues with several small manufacturers ( that live from the customers. ) where I think they can/could put a little care to the LP process will assured that LP perfect center hole: well no one of them cares about!!!!!

Almost all audio items out there I think were designed with out take in count real several Why's, so that's one reason why we always are on the tweacks: we need FINISHED audio items, not an easy task but we all ( customers an audio industry ) have to try about.

Things are hard for we customers to achieve good quality performance in our home audio systems: it is a " long long road to home ".
One way to make things " easy " and better is through the designers/builders of audio items. Of course that like I post it is not easy and not because they are not good enough to do it ( I honest think that they can do it ) but because we have to be ready to pay for those " great " and useful audio items.

Many of us already made/making audio items with that " philosophy " in mind and I'm sure that we follow making in the future but what we need is that the " full commercial " audio items industry take this kind of " road ".
I always say that we need to grow-up ( real grow-up in the right direction. ) but IMHO this is almost impossible if the whole audio industry ( recording, designers, builders, reviewers, dealers and customers. ) does not grow-up.

Regards and enjoy the music.
Raul.
IMHO the fun in our " hobby " must be the MUSIC enjoy and not the endless quest of tweaks.

Raul.