Eminent Technology ET-2 Tonearm Owners

Ct0517
Fyi the Final Audio TT uses a 35mm thick slab of superplastic zinc ( SPZ ) for the "plinth" - weight of plinth exclusive of platter/bearing/armpod/arm is approx 40kg. The inverted bearing and armpod are bolted directly to this slab. Info is here :
http://books.google.co.nz/books?id=ohQdU5ggcOIC&pg=PA143&lpg=PA143&dq=superplastic+zinc+(SPZ)&source=bl&ots=uDqm8e0JsG&sig=oPdsNcyBUypOB6D9VWdrx_vFdgQ&hl=en#v=onepage&q=superplastic%20zinc%20(SPZ)&f=false
The base is tight and quick.
My experience is that slate does ring. A friend of mine is now working on a ultra lightweight composite powdered ceramic sandwhich plinth for the Garrard 301 to try a "non stored energy" approach having discarded slate/panzerholz etc.

In the time of Hegel the only methodological 'instruments' were the 'cocepts' and the 'S is P' sentence form. So to move farther Hegel invented that each concept has its opposite while the opposites have their own opposites, and so farther. I see that this 'method' is not only used to describe things but also put in practice: 'try the opposite if not satisfy with the actual concept results'.

Regards,

Hi Dover – thx for the info. Please tell me there is not going to be a pop test quiz on that material.

More on resonances

My Verdier plinth – which holds the platter, armpod, spindle (no physical bearing) instead two large shielded magnets - is made of Granito.

Granito is a material composed by little pieces of marble of very different origin agglomerated inside a mold with cement. Machined and polished.

The resonance of the plinth with its suspension is about 5Hz and it is well absorbed by the air cavities.

The Granito and resonance info comes from Mr.Verdier himself to me in an email.

My SP10 unit (version 4) is bolted in by four - one inch solid stainless columns to an MDF plinth which in turn sits on a pneumatic suspension, which in turn is on a wall shelf (load bearing) The MDF base is a full TT system plinth as it holds all the goods. It supposedly resonates a little lower than slate. The armpod 19 lbs relies on its weight alone but my version 5 plans are to have it bolted in as well, and I am not sure what material the next plinth will be.

The Nantais L75 is an all wood layered plinth and I have convinced myself that if I take my boat to the middle of Lake Ontario and drop it over it will sink. It feels like cement when carried.

This has been said before – The ET2.5 spindle resonates at 2-3 Hz. The skinnier ET 2.0 spindle resonates at around 5-6 hz.

Resonances can be fun ?

Nandric: I took the plunge and ordered the Clearaudio. On Take Five Audio's site, they looked to be short enough to work well. Thanks for the tip for EBay.UK, which is where I ordered.

Hi Slaw, They are 6x2 mm and made from beryllium/copper.
The shrink is 13 mm and can be cut of course. If you need
less expensive 'tags' for experiments there are also Michell Engineering 'solid brass /silver plated ' which look like Clearaudio and cost 12,50 GBP.

Regards,