Firstly I should say that I've been doing LP12 set up for over 25 years and consider that I'm reasonably proficient and can get my LP12 to sing. Usually.
A recent change to the deck saw a complete strip down and rebuild (in the proper Linn jig of course). I got to the point of setting it up and got a nigh perfect bounce going on. Time to refit the Trampolinn 2 and relocate to the Isoblue. Once I get it there the bounce has become almost completely damped. The Isoblue is level and I've not moved it in years so what's going on?
Ordinarily I invert the deck in the jig to refit the Tramp but I decided to try a different approach. I put the deck back in the jig and removed the Tramp and rested it on a box so as not to stress the earth lead too much. After refitting the platter etc. the bounce was back and after a bit of minor tweaking it was perfect. I refitted the Tramp in situ and checked bounce. Still perfect. Relocate to the rack and, you guessed it, it's back slogging like a pig in treacle.
All I can think is that, when the feet take the strain, the weight of the deck is bending the Tramp upwards enough to foul something. But what? The arm lead is well clear and I can't think what else it could be. Also there can't be much deformation, the feet are positioned near the edges where the base is effectively more rigid and I can't believe that there's more than a fraction of a mm of deflection.
Any suggestions gratefully received.
A recent change to the deck saw a complete strip down and rebuild (in the proper Linn jig of course). I got to the point of setting it up and got a nigh perfect bounce going on. Time to refit the Trampolinn 2 and relocate to the Isoblue. Once I get it there the bounce has become almost completely damped. The Isoblue is level and I've not moved it in years so what's going on?
Ordinarily I invert the deck in the jig to refit the Tramp but I decided to try a different approach. I put the deck back in the jig and removed the Tramp and rested it on a box so as not to stress the earth lead too much. After refitting the platter etc. the bounce was back and after a bit of minor tweaking it was perfect. I refitted the Tramp in situ and checked bounce. Still perfect. Relocate to the rack and, you guessed it, it's back slogging like a pig in treacle.
All I can think is that, when the feet take the strain, the weight of the deck is bending the Tramp upwards enough to foul something. But what? The arm lead is well clear and I can't think what else it could be. Also there can't be much deformation, the feet are positioned near the edges where the base is effectively more rigid and I can't believe that there's more than a fraction of a mm of deflection.
Any suggestions gratefully received.