Discuss The Viv Lab Rigid Arm

@lewm : Strain gauge needs correction too. Its amplitude developed curve does not coincide exactly with the RIAA one.

Anyway, if he does not shares his idea how we can comment about or better yet: how can we learn on it ?

Problem with LP is the tracking distortion developed by the stylus tip surface friction during playback. .

R.

Raul, I agree that a strain gauge used without any correction would not conform well to RIAA, because it would not be correct in the region 500Hz to about 2kHz, where the RIAA curve has a plateau. But like you said, because we don't know the identity of the cartridge, or even if it is a strain gauge for sure, I felt that no further comment was justified.

Friction is unavoidable, even the lowest coefficient of friction achievable is friction.

Surfaces have imperfections, the contact of Two Surfaces imperfections when movement of surfaces is occurring causes the imperfections to deform as they rub onto each other.

Such minute movements on both surfaces and the resulting energies produced, are the suspected cause of Friction.

As the fundamental cause of Friction is not quite known, some producers in relation to Cartridge design, have gone to the lengths of spending extra on making the Styli an improved smoothness to its surface by polishing to produce a surface with less imperfections. I assume with the intent to improve slippage of the styli as meets a surface that will create a drag affect. This will assist with Speed Stability, but as for improved extraction of data from the groove modulation ???     

The cause of friction is gravity, in this case..

@rauliruegas

" 26 tons of pressure per square inch at the cartridge stylus tip during its ridding "

Now, I don't need an explanation how is that that skating force can the stylus tip under that tremendous and infernal pressure at the tip to spin.

Common sense says:NO WAY.

Raul, are you suggesting that AS force is immaterial because it is so small in comparison with "26 tons per square inch"? Since neither the point of the stylus nor the side in contact with the groove is anything like a square inch, it would fairer to compare the actual applied forces, where the AS is about one tenth of the VTF.