TT mats

enginedr1960, Are you blocking EMI with the ERSA mat?  I ask because this is worth doing for some DD turntables.  On the L07D website, one is advised to do something about that, even though the L07D has a 5-lb stainless steel "platter sheet", which one would think has at least some effect on blocking EMI radiating from its coreless motor.  Nevertheless, and in agreement with the advice on the L07D website, I hear improvements with a piece of TI Shield between the platter and the platter sheet.  I have had a copper platter sheet made, which mimics all dimensions of the stock stainless platter sheet, in hopes that it will better block EMI, and I will be able to remove the TI Shield.  It's "in the mail" coming to me as I write this. (TI Shield causes issues with some LOMC cartridges, because it contains iron; the L07D motor stator induces a magnetic field in the TI Shield, which sucks down on LOMC cartridges. No free lunch, I guess.)  

@lewm - The K-Works Ersamat does claim to block EMI from getting to the stylus/cartridge.

I use a graphite felt mat with a Mitchell clamp on my Linn aluminum platter…works fine, sounds great.

bondmanp, Thanks for that info.  I will look into that mat for use on the TT101, which also has a coreless motor.  Both the TT101 and the L07D motors are derived from the original Dual cordless motor (as is that of the newer Bergmann DD turntable).  In these motors, the stators and rotors are oriented 90 degrees differently from those in typical iron core DD motors, such that I think there would be a field directed upward toward the LP.  In any case, the L07D behaves as if there is.  I've often thought of buying a meter to measure the field strength, but so far thought has not turned into action.

"coreless", not "cordless"