3 New UBER Decks - Is this Turntable's SwanSong? 🦢

The wow and flutter of good modern turntables is hidden in the noise of record irregularity and eccentricities. All this is interesting and totally academic. 

@rauliruegas , sorry I missed your last post. Yes, it is very possible that one side could be off center in a different direction. I have never seen it in the records that were off center as I never thought to compared sides. But if you look at the way records are pressed the A and B side stampers or fathers are punched individually. One could be punched off center and the other not. I will carefully look at off center records to see what the other side does.

I have not tried it but you could fill the off center hole with a mixture of epoxy and ebony dust. You would contact cement wax paper to one side and fill the hole from the other. After the epoxy sets you remove the wax paper and clean off the contact cement with lacquer thinner. You would then mark the center using a compass and drill a new hole. The record has to be fixed on a drill press so that the drill does not walk off center. 

Raul.

Thanks for your comment. Yes the test record is what most of us use if we are to look at W&F, and as I have said earlier, it is useful to broadly differentiate between TTs. This despite the many variables in play. 
I also pointed out that we abandoned  the platter speed app, this was during the development of K1.
An interesting aside is that K1 had a similar subsonic resonance as seen in the TT-101. It was not always there and we could induce it by stopping and starting.  The controller we used enabled us to tune this aberration out. Clearly visible on the yellow trace, this detail was filtered out on the green.
 At that stage, in its early development, K1 had a similar messy yellow trace to some of the TT's posted here.

Mijostyn

"The  wow and flutter of good modern turntables is hidden in the noise of record irregularity and eccentricities. All this is interesting and totally academic."

We are going to have to agree to differ on that one.
Cheers. 

Dear friends: For many years now we all were spending " thousands " of $$$$ for our LPs that its prices always goes up and up.

I can't understand for sure why with all those money manufactures took and take for us no single LP pressed is dead-centered on both sides and with out waves/surface irregularities.

In theory we pay more than enough to receive a " perfect " LPs and we just never can do it.

I know that  analog is way imperfect but seems to me that those LP manufacturers are full responsable of that specific issue but we audiophiles are not really demanding about an : accepted as " normal " behavior ! ! ! ? ? ?

R.

@rauliruegas  You bring up a great point, why do LP manufacturers get away with providing what in many cases is a sub par product? The answer is what I think you touched on...because they can! 
I noticed on an email that was sent to me yesterday from Elusive Disc that Analogue Productions is increasing their price structure, across the board...and to order now before the price increase. Why is AP able to do this...same reason as above! 

Your wide explanation of the yellow raw frequency is really an eye open and truly welcomed.

I'm delighted to see that at least two people here are naive (or foolish) enough to believe that the yellow RAW Frequency Plot is of any value without a computer algorithm to correct for record warps, hole eccentricity etc because I think I've found that elusive pure sine wave for the Raw Frequency that Richard Krebs was unable to supply for his OMA-K1.....?

RAW FREQUENCY PURE SINE WAVE  

Over to you Mr Krebs.......🤗