Direct Drive vs. Idler Drive vs. Belt drive

@thuchan

they do not have an airbearing concept like Caeles or the Apolyt.

i assume when you say 'Airforce tables' you are referring to TechDAS.

are you saying that the TechDAS Airforce tables do not have air bearings? or that their approach/concept to air bearings is different than the Caeles and Apolyt?

since clearly the Airforce tt’s have air bearings.

if it’s a different approach to an air bearing, please explain how it’s different. thank you.

The problem with Direct Drives is a big oscillating magnetic device directly under a very sensitive magnetic device.

@mijostyn   What is the result of this? We've been making and playing belt drive machines for about 20 years but when playing the Technics machines I don't hear anything in the way of noise floor that would suggest this is an issue.

@atmasphere

With Mijo, I wonder about that too. If you were running a really low output MC like some of the AudioNotes, you would think that the electro-magnetic noise from the motor might have an effect. It is not clear just how that noise would manifest, and if it were a subtle veiling of the music, one might ascribe it to something else, or even not hear it consciously at all.

That would depend on distance and magnetic isolation, I suppose - and on the plinth and platter material; so I suppose that aluminum (paramagnetic), or even better, copper (diamagnetic), might be a solution. Might that be why a copper mat works well on some turntables?

Hi @terry9 ,

Nottingham Analogue  Sapcedeck is not entry level. It was a third level after HORIZON and INTERSPACE. I bought Nottingham Sapcedeck with Spaecarm in 2002 a brand new by full price.
I bought EMT948 in 2011 on eBay used by 2400 Euro. Yes I know that it costed 12000 DM brand new back in 1980x. But I payed a similar amount of money for both turntables.
An I also had Lenco L78 in between 2010-2011. And I liked this  low budget TT more than  Nottingham Sapcedeck. 

Regards,
Alex.