The Mike New Technics Bearing

[Marco]

I will be interested indeed to read your findings Marco.

All will be revealed in due course, mate, after I've collected the base-plate at Dave's bake-off: http://theartofsound.net/forum/showt...o-Fest-Returns

I'll be having it fitted to my turntable at Martin T's place soon after that

Marco.

[CageyH]

Don't want to get your hands dirty?
Let me know what you think of it. I'm still not sure of the merits.
I am thinking that a similar affect could be had by fitting the bearing in a bed of PR sealant. Horrible, messy job though!

[Mike_New]

Folks,
Following on from the above.
I have read many posts concerning the pushing of gunk under the bearing well and forcing the bearing onto it. IMO this aproach is completely useles and without merit, in spite of the fact that aknowledged vendors supply the stuff.
If you look at the engineering physics of the situation, we are stuck with a reasonably flimsy well area that we are now going to force downwards by stuffing gunk below the bearing. What we are doing is now forcing this material into the well bottom by screwing down on the three clamping screws.
a) Firtly these three screws are self tappers going into the relatively soft die-cast alluminium chassis, if you are not careful you will strip these threads; as I believe was done by one purchaser of my Bearing Base Plate!!

b) all you are doing is now placing an upwards force onto the bottom of my Bearing against the screws, however the reflected down force is only serving to distort the bottom of the bearing well, which might well (excuse the pun) cause reflections of energy and make things a bloody site worse.

At one stage of my design developement of the Bearing I did consider removing the bottom of the well in order to produce a longer bearing. However, my bright idea of placing the support nitride-ball inside the bearing avoided this although it does increase the cost of machining and polishing the main shaft due to the cavity for the ball.

For those who feel they want the ultimate rigidity for the Bearing support then my Base Plate is the way to go as it spreads the weight of the platter and any very small vibrational forces across over 6 times the area.
Also the bearing now sits onto a flat solid surface, whereas in the OEM version the bearing sits on three protrusions with no contact with the chassis surface. (These protrusions are removed when fitting my Base Plate)

Note: for the purists these protrusions could be removed in the same manner as explained for my Base Plate, however as has been noted in other posts and threads the depth of the bearing well seems to vary acording to the model so be careful.

There really can be no comparison between stuffing gunk into the Bearing well and the implementaion of the Base Plate!!!!

[CageyH]

Unless the gunk stiffens up the well? It depends on the product and the implementation.
I really don't believe that the standard platter will deform the bearing well sufficiently to worry about.
A heavier platter may cause an issue, but you are talking about micro deflections, and probably only when changing records.

[MartinT]

It's less to do with deforming the well, Kevin, and more to do with not flexing under the micro-vibrations caused by the stylus tracing the groove.

[CageyH]

From an engineering point of view, I find it difficult to believe that the base plate will make a difference to the the effect of a microvibration caused by a cartridge tracking at about 2g. If you guys are happy with it, and you can hear a difference then that's the main thing.

[MartinT]

The fact that vibrations will reach the bearing are incontrovertible. The key question is: how much, and what is the effect?

[Andrei]

The fact that vibrations will reach the bearing are incontrovertible. The key question is: how much, and what is the effect?

In my case it would have to go through the record, through the 5mm achromat, and through the damped platter. As a percentage of the vibrations that the bearing produces while turning it is too small to worry about.

[MartinT]

As a percentage of the vibrations that the bearing produces while turning it is too small to worry about.

But how do you know that? Serious question.

[Mike_New]

I frankly do not think that Andei understands what he is talking about.