ProfTournesol wrote:Given that the Olympics are such depressing viewing for us at the moment by thoughts have turned back to the turntable. I'm going to source a piece of Foamex and bond it to the bottom of the sub-chassis. The thinking behind this is that any record/tonearm induced vibration that passes past the Achromat is trapped in the sub-chassis. That energy has nowhere to drain, therefore by adding a layer of foamex I'm hoping to absorb some more of it. Any suggestions on a bonding agent?
Is the underside the best place for this or the edges? Will adding it to the bottom just change the resonant frequency and harmonics, lower them?
Pink Triangle originally had a foam strip around the edge of the subchassis. Those were the very first PT1s anyway with the seperate armboard top plate (maybe champagne mirrored glass) and sliding, square switch.
You have a vectored something don't you rather than Anni? I guess the Anni used balsa to dampen so perhaps underside is effective.