The Mike New Technics Bearing

[Nigel]

Yeah, hope it's something that can be easily sorted, Nick.

For what it's worth though, I'm virtually useless and I managed to fit the bearing without any problem. I would class the job as easier than installing and correctly setting up a cartridge. Anyone who can satisfactorily fit a cartridge should be able to manage the bearing swap.

[nickbaba]

hmmm... removed the MN bearing and replaced the stock one.

everything back to normal - so thank gawd no damage...

any thoughts anyone? obviously something with the new bearing...but what?

all seemed to go in fine... i don't get it.

[chris@panteg]

hmmm... removed the MN bearing and replaced the stock one.

everything back to normal - so thank gawd no damage...

any thoughts anyone? obviously something with the new bearing...but what?

all seemed to go in fine... i don't get it.

Nick , what exactly is happening with the MN bearing in place ? You've listened to it I presume .

[kininigin]

Hi nick,

Sorry to hear of your trouble,i'm not sure what is going on but the other month i had my platter off to disable the target light and when i replaced the platter i had speed stability issues,this is with the stock bearing.

So i took off the platter again,re-checked everything and replaced the platter.The second time it was fine!!

So maybe,if you haven't already,you can try the MNB and this time try the platter on and off a few times?

[MikeMusic]

Anyone who can satisfactorily fit a cartridge should be able to manage the bearing swap.

I wouldn't think about fitting a cartridge.
Lie. I would think about it, then realise I could only do that in a parallel universe

[MikeMusic]

hmmm... removed the MN bearing and replaced the stock one.
everything back to normal - so thank gawd no damage...
any thoughts anyone? obviously something with the new bearing...but what?

all seemed to go in fine... i don't get it.

Phew.

Likely something 'obvious' I would also miss

[nickbaba]

hi chris - if i can describe more accurately what i was hearing, it was that doppler effect where the pitch rises and falls continuously, in this case roughly 1 full cycle per second. Sounds like when the batteries start going on a cassette player, if you know what i mean.
when i removed the MNB and replaced the stock one, the sound was again normal.
before spinning a record i double-checked that the pitch-fader clip was securely replaced, the platter was levelled (tested with a platter spirit-level that sits over the spindle) and the cart and arm were properly set-up.

It must be something with the positioning of the bearing, perhaps it was slightly off-centre, but i can't see how as it was all screwed firmly into place.

There is one thing i was scratching my head about... the 3 long black screws fix to the bearing where it slides through the PCB...but on the MNB there are 3 more holes machined... what are they for? I didn't receive any extra screws or bolts in my pack from Mike...have others used these 3 extra holes to secure the bearing? (so its held by 6 screws instead of 3 like the stock bearing?)
Am i missing extra screws, and could that be making a difference?

[chris@panteg]

Nick I think those extra holes are for the optional base plate , is it worth refitting the bearing , making sure everything is level ! And running it for 24 hours or maybe 36 ? Then listen again ?

[RobbieGong]

hi chris - if i can describe more accurately what i was hearing, it was that doppler effect where the pitch rises and falls continuously, in this case roughly 1 full cycle per second. Sounds like when the batteries start going on a cassette player, if you know what i mean.
when i removed the MNB and replaced the stock one, the sound was again normal.
before spinning a record i double-checked that the pitch-fader clip was securely replaced, the platter was levelled (tested with a platter spirit-level that sits over the spindle) and the cart and arm were properly set-up.

It must be something with the positioning of the bearing, perhaps it was slightly off-centre, but i can't see how as it was all screwed firmly into place.

There is one thing i was scratching my head about... the 3 long black screws fix to the bearing where it slides through the PCB...but on the MNB there are 3 more holes machined... what are they for? I didn't receive any extra screws or bolts in my pack from Mike...have others used these 3 extra holes to secure the bearing? (so its held by 6 screws instead of 3 like the stock bearing?)
Am i missing extra screws, and could that be making a difference?

Hi Nick and anyone else looking to do this. 1. It isnt hard at all. 2. Your guess as highlighted is probably quite likely. Mike will tell you that if it doesn't seem right to start with ie: when you turn the platter on all isn't smooth, then just loosen the screws that hold / secure the bearing in place and re-seat it. Also another tell tale sign is that you should not have to fight to tighten the three long black screws. They fit very precisely and tighten smoothly when you have the bearing sat / housed correctly, the opposite occurs when you havn't. I had a few goes till I was happy. I really wasn't fazed by undoing the screws and re-seating till I was happy and knew all was well, you really dont need to be (Look how many of us have these fitted here on the forum, not to mention world wide )

[OneyedK]

any ideas what could be causing this?

Does the platter spin freely if the TT is powered off?
(I had a similar problem, it's not really bearing related, if the Technics platter is badly cast, the inner ring touches the bearing housing)

And don't worry, you have to be pretty agressive and clumsy to damage the motor coils...