T-Bone, you almost lost me there with all the switching around, but if you do a plinth right, I believe it would be really hard to pull off. The reason is because different mechanisms require different sorts of tuning. Different top plates resonate in different ways, too. A plinth that might bring the best from an SP-10 might not do so well for a Garrard 301. It seems like a tricky proposition to me.
Single plinth for multiple table/motors
I recently saw a picture in another thread about a Sony TTS-8000 which got me thinking. Would it be possible and/or reasonable to build a single plinth (in the manner of CLD a la Lenco "Home Despot" tables or similar to the construct of Alberporter's recent Technics SP-10 Mk2 and Mk3 efforts) which would accept a "top plate", to which the table/motor was affixed, similar to the way some of these tables have armboards to switch arms.
I have a couple of table/motors that I would like to re-plinth, and a couple of arms which I would like to use. If I could affix the table to the "plinth top plate", and then seat the "plinth top plate" within a larger "outer plinth", my thought is that a slight change in material construction between the top plate and the larger outer plinth would have the effect of reducing overall plinth resonance. It would also allow me to build a single large "outer plinth" and cheaper sub-plinths for each table so that I could play around with several others. Theoretically, once I build a basic plinth, I could add more TTs/motors, or simply change from one TT to another at some point in the future, building only the sub-plinth in order to make it work. I would not need to build (or get built) a whole new plinth with sets of armboards each time I wanted to change things.
Any thoughts as to whether this is a stupid idea? Or any thoughts about methods of attaching the sub-plinth (the one carrying the table) to a larger "outer plinth" would be helpful. I was almost thinking that using something like bicycle wheel quick-release assemblies which would clamp on the bottom would be one way to be able to change them quickly and efficiently, and to allow a little bit of flexibility in how hard one clamps down (when I tested headshell screw tightness, I was surprised to discover some changes are audible).
I have a couple of table/motors that I would like to re-plinth, and a couple of arms which I would like to use. If I could affix the table to the "plinth top plate", and then seat the "plinth top plate" within a larger "outer plinth", my thought is that a slight change in material construction between the top plate and the larger outer plinth would have the effect of reducing overall plinth resonance. It would also allow me to build a single large "outer plinth" and cheaper sub-plinths for each table so that I could play around with several others. Theoretically, once I build a basic plinth, I could add more TTs/motors, or simply change from one TT to another at some point in the future, building only the sub-plinth in order to make it work. I would not need to build (or get built) a whole new plinth with sets of armboards each time I wanted to change things.
Any thoughts as to whether this is a stupid idea? Or any thoughts about methods of attaching the sub-plinth (the one carrying the table) to a larger "outer plinth" would be helpful. I was almost thinking that using something like bicycle wheel quick-release assemblies which would clamp on the bottom would be one way to be able to change them quickly and efficiently, and to allow a little bit of flexibility in how hard one clamps down (when I tested headshell screw tightness, I was surprised to discover some changes are audible).