New Turntable Advice

@badbruno I am one of the demographic you have discouraged from posting, as Subjective Analysis is my thing, as for some reason I am recognised having a discerning ear and a system that pretty much reveals the nuances as each layer of the Onion is revealed.

I know lots of Techie' Info, but am not at liberty to discuss it publicly it is not my IP.

Other who you encourage to partake, are in the larger volume with a business interest and can only be limited with their IP, how far that extends beyond Manufacturers Published Data and investigation of those performance measurements I can't forecast.

I don't see much more evolving as there are lookers in, that like to steal ideas for their own remuneration purposes.

I can be easily wrong though, back to my Earl Grey and Cucumber Sandwich.      

@badbruno I have re-read your OP and a selection of replies.

I have seen your initial inquiry and subsequent posts have been adequately supplied content to assist with raised queries. 

Your latest Post is not in any way associated to the OP and other Posts. 

This latest request for Technical Discussion and your being interested in other areas that are connected to audio electronics,, is extending beyond creating  a system and being a listener of recorded music., is one that has quite a limited interest from the broader audio community.

To myself it looks like your last post is a New Thread Request where Off Topic contribution can be dismissed. 

This Thread is full of ’ Off Topic’ when considering  what is asked for in your last post.

The Breakfast Club ’might not meet’, if a New Thread is produced, only way one to find out.

Again, I may be wrong, Is it getting near the recess to have my afternoon Tea and Cake 🍵🍰

On the hunt for a Sony PS-X9

@pindac ”…to assist with raised queries…”

Thank you for your analysis of spindle tolerances. 
 

In the 1980s l had a Walker CJ55, a modest turntable mainly of wooden construction with a tufnol/paxolin platter that had the spindle inserted. I was never happy and heard wow consistently. The turntable had good reviews and Walker himself even sent me a complimentary new belt because of my concerns. I was convinced the spindle was off centre with the bearing/shaft and l had no way of checking this. I sold the turntable to a neighbour who could not hear the wow.

Your article has reassured me that what you say was what l heard. Further to your comments on record centre tolerance’s and with a spindle 0.2mm error, would surely make any record player unplayable if both extremes are combined. 
 

Being in the record world (so to speak) for 55 years l have noticed off centre holes are not a new thing, and if anything have become more common. I  believe 0.2mm is quite normally these days exceeded. You have rightly pointed out, the centre hole is in the manufacturing process so correct maintenance is key. Most record presses are now 50 years old out there pressing new vinyl today.

The TT Brand which has a sought after model produced in the 80's off which I own Three, where all have Bearing Housing Spindle Rattle and a Platter that  Rocks when seated on its Spindle Mount.

Which has been seen fot £8Kish is a Sony Model.

I have one as a Hospital Job Overhaul, where the Bearing Housing Spindle / Bush - Spindle / Thrust Pad - Bearing Housing Sump Seal is a complete redesign.

There is a plan to produce a perfect fit part to insert into the Platter to create a rigid coupling for the Platter. 

These models are not able to be produced as  Kaneta variant so has been a rested work on more than one occasion. 

I am not the first to have the bearing overhaul. The owner of 2 x Same Model Sony's as my own, who has done A/B comparisons with their TT's in Panzerholz Plinths can't help but inform the OEM TT that was so impressive, is now totally unwanted when the modified version is the other option.

My own design being produced has added knowledge and design tolerances incorporated, which will tidy the mechanical interfaces further and enhance the End Sound further, especially with the Platter addressed as well. 

Caveat Emptor is always ones best friend when considering Sony. DD TT's.

I always wondered with the Sony knowledge of CD being launched, did Sony  reduce analogue investment much earlier than other Brands, as the concern shown for mechanical interfaces is extremely poor.