The astuce

[spider_pig]

issu de cet article de Lurné:

http://www.tnt-audio.com/intervis/lurne_arms_e.html

"       
The One Single Hard Point. - Not commercially available but already encountered elsewhere. Spikes belongs to this category. The single point of contact imposes “One way out and one only”; the contact pressure being high, parasite energy flows through easily and hardly comes back; the geometrical stability of the critical cartridge to bearing axis is complete. Besides and as we are going to see, there are extra provisions for interesting damping, VTA and Azimut tunings.

Caution: this hint is intended to the knowledgeable audiophile who is familiar with technical things. Remember a cartridge is very fragile and very expensive!

Look at your Cartridge/Headshell mounting. Locate their surface contact. No need to disconnect the mini pins. Unscrew your cartridge of 3 to 4 turns.

From now on your precious minute adjustments are all lost and will have to be redone. This operation clears a tiny gap between cartridge and headshell. Prepare a paper strip, around 9X40mm, roll it up and flatten it out. Cutting parts adjusts the thickness. Insert this little wedge in the gap through the cartridge front and between the 2 screws. Secure the position tightening the screws gently only. Prepare a tiny bit of a sewing needle* – just a couple of mm long. Insert it in the gap at the cartridge back. On the middle of the back. That’s it ! The joint is now restricted to the needle contact. The paper wedge acts as a damper right at the critical place. Depending on the screws pressure you get extra ways to tuned VTA and Azimuth. More or less strongly tighten the screws, in all cases the pressure is massive because of the tiny contact point of the needle. Unlike the normal situation this means that even plastic /nylon screws can be considered. Perform again the usual cartridge adjustments. Arm height too. A tricky job - sorry. A job to be checked and fine tuned several times in the future.

Enjoy ! Yes it is not perfect, nothing is perfect on this earth, but it is much better! From that basic principle one can imagine many variations. Once again take care with your cartridge stylus. Break nothing and never turn Old Good Physics upside down. "

[Pseudo]

Pas convaincu, même si c'est M. Lurné qui le dit.

CT