LP eccentricity, spindle hole center,The fix??????


Hi all,

I'm one of those audiophiles, 67 years of age, that wonders about the effect of the accuracy of the center hole. Some of the LPs I put on the TT have play due to a center hole that's punched out of round, too large or what ever.

I'm playing a record on a Denon 308 direct drive table using a system devised by a LJT Mfg in Canada to reduce eccentricity and help flatten warped records using a peripheral ring clamp in conjunction with a 1420 gram spindle clamp. The trio comes along with a cnc machined polycarbonate centering disc that straddles the record after the clamp ring is set registering on the outside diameter of the record. I can feel play regarding the center hole as I implement the OD centering device. I'll measure it tomorrow, just a few thousandths. The music sounds fine to my ears but I wonder what the relationship is to the record grooves, the outside diameter, and the center hole.

A while back a TT was made that had an extra arm that MEASURED THE ECCENTRICITY of the record and re centered the disc for play, it sells for big bucks if you can find one.

FINALLY, Your thoughts on the question?

regards, Ken Fritz
kftool

Showing 6 responses by rauliruegas

Dertonarm: Ok, good that you are of that kind of people that like " live its life " ( make things happen. ) and not only see how its life goes through.

Please email me to start about. All of you auio and music lovers friends ( elsewhere you are ) are invited too.

Regards and enjoy the music.
Raul.
Dear Ken: The fix????

IMHO, like in the human been healthy, the name of the game is to prevent not to fix.

We have to form an audio-association ( audiophiles/music lovers ) and ask to the RIAA ( or to the correspondent oficial institution ) to make a RIAA standard for a " perfect center hole " to all the LP manufacturers, this is what in my opinion we have to do not trying to fix things that are errors on the audio item maker.

We have to be serious on this subject and many others and give it a serious treatment looking for a final solution. IMHO I think we need to help us in a more definitive way.

Do you want to start? any one? who say, I.

Regards and enjoy the music.
Raul.
Dear Dertonarm: Where we can find those standards on the subject?

Now, the " perfect center hole " standard when is achieved give all of us an immediate quality improvement, it does not matters which analog system we own.

is there a " road " for the recording industry can fulfil with that standard? who is the institution that have to control that that standard be fulfil/realize by the LP manufacturers? how anyone could " force/compel " to the LP manufacturers to do it?

We are paying a lot of money for new LP's that are really bad/wrong in its overall quality.
I don't know others but I'm willing to pay an extra " fee " for that " perfect center hole " standard, no doubt about: that makes a difference for the better.

We all here are commited to improve the quality perfomance in our home systems but I can see that for many of us that is not really a priority because in more than one ocasion I bring this subject with receive almost no " eco " to make and take actions about.

I consider you a serious man on this and other subjects why don't start ( you and me ) or take some actions about, let me know IMHO we need to do it like a " group ", this is not a " fight/war " for one person.
What do you think? or you think it will be " futile " ( like you say. )

+++++ " is such a small segment of the audio/video market, that this (we...) and its (our..) needs are of no interest at all for the industry. " +++++

well, remember that we ( the customers ) are part of the industry and not only that but that industry " lives " thank's to us not to them.

regards and enjoy the music.
Raul.
Dear friends: I already email Dertonarm on the subject to start about and we come back to you in a dedicated thread to share and take ideas from all of you.
In the mid-time you can email us with your thougths and ideas on the whole subject, I mean any subject.

Rgeards and enjoy the music.
Raul.
Dear Dertonarm: Very good, I already email you with some thoughts. Please email me to go on.

Regards and enjoy the music.
Raul.