A Copernican View of the Turntable System

Brad,

Halcro, your a tough cookie when an idea is presented that is not yours.

Sorry you feel that way. I thought this Forum was an exchange of ideas and information?
I studied structural engineering for 5 years as part of the Architecture course and for 40 years worked on a daily basis with some of the best structural engineers in the country including Arup Assoc who did the Sydney Opera House.
Structural design involves physics, mechanics, material proerties, geometry, maths, trigonometry and even algebra.
Advanced structural design is not often 'intuitive' and can rarely be interpreted by lay people.
When you present a design which I see has obvious structural flaws.....I am attempting to prevent those who might see this solution as viable....from making a mistake? Nothing more....nothing less.
And the added lead ballast to the lower section of the pod actually does little to increase the mass of the pod at the arm connection point. But I won't rain on your parade by explaining the reasons :-)
And c'mon......the asparagus tin jibe?
But just for interest's sake.....there is more structural integrity in an unopened asparagus tin than in that armpod.

Lew, rigidity (aka-stability) does not assure transmission of vibrations from the shelf into the pod. A constrained layer pod can be rigid and stable yet repel vibrations.
However I think it best to decouple vibration from the shelf via the footers or spikes under the pod.

Henry, Agreed. Dissimilar materials. Spikes only work as diodes if one takes care to place them over vibrational nodes in the shelf material. These can be identified by tapping the shelf whilst moving a stethoscope bell across it so as to find places where the tapping sound is least well transmitted, i.e., a node, a point where the shelf is not in motion. I have done this, and it's really quite obvious when you have found the sweet spot. Otherwise, spikes will move energy in both directions albeit with different efficiency depending upon direction.

Lew, I'm looking at the the V2D series ball contact, have not purchase them yet. Open the pdf and eBay listing to get a better look. Their description is contradicting in some areas to me so a call to them will be done before purchasing. I like the concept and the price isn't out the box.

Brad

Dear Thuchan: Useles to continue arguing with you on a subject that you just don't understand or you don't want it.

Last: where goes all that MS rotational energy with its generated vibrations/distortions? where to hide? under platform underneath? where and how?

When you have the precise answers to those questions then you not only could understand where are you seated right now but you will have the opportunity to look how to attain a real improvement on what you have today.

Enough.

Regards and enjoy the music,
R.

Dear Dover: I agree with you and about your Final TT I posted somewhere how the designer was so advanced on the PS design that even today many TT can't approach it.

What you said about that Sota TT mods that does not likes to some audiophiles is one of the main PROBLEMS in audio: almost no one likes accuracy/neutrality, what we like because some way or the other we are accustom to are distortions different kind of distortions and when we heard audio items with a good neutrality level we just don't like it: like Thuchan with the SME 30.

I'm supporting neutrality in this forum for the last 3-4 years and other than Syntax almost no one want to speaks about: they prefer to " go on " when IMHO the CANCER on our hobby are: DISTORTIONS/COLORATIONS and the like that came in different kind and ways and for different reasons but IMHO this Cancer has a cure a solution and this cure/solution is to look for accuracy/neutrality avoiding all kind of distortions in any single link in the audio system chain.

We have to learn how we can achieve that level of accuracy and neutrality with out lose the MUSIC emotion/feelings.
I'm in the road and still far away to achieve the target but day by day learning I'm nearest to that target.

That's why I take the job to build my phonolinepream, my tonearm and in the near future a cartridge and a TT. Why took I this kind of job?: because almost no audio device manufacturer took/take it.

I don't have any commercial targets my only one target and compromise is to honor MUSIC at home and we can't do it adding distortions and unaccuracies elsewhere the audio systems.

Regards and enjoy the music,
R.