Help! New TT skipping badly....
This worked for me. It may not solve your problem, but it's worth a try. Otherwise
you need a wall shelf or springs like the Townsend. Amazon.com: Auralex Acoustics Sound Damping Products (ISOTONE): Musical Instruments |
As you have noticed some suspended turntables will also skip with footfalls. The two mentioned here are the Linn and the AR. The Linn is a copy of the AR and uses the same unstable suspension design. They are both also underdamped. Sota was the first company to address this problem back in 1980 by hanging the turntable from the suspension instead of sitting the turntable on top of the suspension. The Sota design is inherently more stable. SME and Basis copied this design. All three turntables are totally resistant to foot falls. The Linn and AR suspensions will isolate the turntables from vibrational issues within the audio band but because they are unstable impulse problems like footfalls get them skipping. Yes, you can tap on them vertically without trouble and if on a very sturdy rack you can even hit them vertically with a hammer. But, just a light tap to the side of either turntable will cause skipping. The Sota will tolerate this until you hit it so hard the turntable actually moves. The MinusK platform is special because it is not just sprung vertically but also horizontally. You can cause horizontal movement and the turntable won't skip. @winoguy17 , you could put lally columns on either side of the furnace with a beam between them bracing the floor but there are no guarantees that it will work. I think you best spend the money and time on a new table. IMHO you will also benefit from a tonearm with proper bearings. |
mijostyn" Linn is a copy of the AR and uses the same unstable suspension design." Actually they are noted and recognized for being precise, reliable, and stable. "Sota design is inherently more stable. SME and Basis copied this design" Actually using four springs is not more stable than three there is nothing more stable than a "tripod." " All three turntables are totally resistant to foot falls." This is speculative and it is untrue and false you act like you know everything about turntables but just the other day you said you don't even own one!!!!! |
With springs it is essential to tune in order to match the load to the springs. If they are too stiff they won't isolate much, and that may be what is going on here. Looking at what you've got to play with, I would try springs under the 3" thick butcher block, with the turntable on top of that. Add or remove springs until they are compressed about half way under load. When properly loaded, when you give the whole thing a push it should bounce or oscillate fairly slowly. In addition to adding/subtracting springs you can also weight the shelf, with anything such as a bag of sugar being fine for a test. As good as Nobsound work, one of their bigger shortcomings besides lack of damping is they really only isolate best up and down. Because of the number of springs and the way they are arranged they have a lot of stiffness side to side and in other planes than vertical. Without being there it is hard to know but you may have a situation where the rack is rocking front to back or something like that more so than up and down. If that is the case you can get better by tuning Nobsound but the real solution will be Townshend Pods or Platform, those isolate equally in all planes. |
