Prototyping a new Garrard 401 bearing base plate

REXTON

Member
2009-09-30 5:19 pm
Hi, I've decided I'd like to try a 401 bearing on my 301 deck but I have to raise the platter slightly to be able to achiebe this. I see this as an oppotunity to reduce the vibration of the bearing going into the 301's chassis. I have two questions :-

1. Is it better to reduce vibration over a larger or smaller surface area i.e. would 3 simple rubber "nuts" be the best solution or would I need to make a base plate that covers the entire surface area of the bearings underside/

2. Is it better to try and reduce a vibration's frequency into a specific Hz that is not audible or poses a risk in creating spurious resonances that can be picked up further down the line like in the chassis, platter, tonearm?

Hope these make sense.
 
Hi, I've decided I'd like to try a 401 bearing on my 301 deck but I have to raise the platter slightly to be able to achiebe this. I see this as an oppotunity to reduce the vibration of the bearing going into the 301's chassis. I have two questions :-

1. Is it better to reduce vibration over a larger or smaller surface area i.e. would 3 simple rubber "nuts" be the best solution or would I need to make a base plate that covers the entire surface area of the bearings underside/

2. Is it better to try and reduce a vibration's frequency into a specific Hz that is not audible or poses a risk in creating spurious resonances that can be picked up further down the line like in the chassis, platter, tonearm?

Hope these make sense.

I think these experiments are only usefull if you can measure the results thus measure the wow , speed .These original trustbearings were not that bad at all.
 

REXTON

Member
2009-09-30 5:19 pm
I think these experiments are only usefull if you can measure the results thus measure the wow , speed .These original trustbearings were not that bad at all.

I'm not interested in "measurements", it's how it sounds that is important. I like play vinyl and not obsess over measurements. ;)

The 301 has an excellent main bearing, a good plinth is needed.

I own a 401 which I have yet to get running, but I've not heard that its bearing has any particular advantage over the 301 bearing.

Which version do you have oil or grease?

I have a oil version. The 401 bearing has better rumble through the bearing compared to the 301, this is info supplied from the guy that now owns Garrard.