I was in a “vintage” retro hifi store last week. The owner showed me his Townshend Rock tt w viscuous damping. Only problem is that the damping fluid migrates out of its slot onto the tonearm!
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Where was it escaping from? I've wanted to make a trough like that but dealing with the fact that silicon fluid can and will escape always worries me.
It was migrating right out of the trough onto the fixture and stylus! The fixture seemed to be a powder coated aluminum casting.
Doing some research silicone fluids are used in dampers for scientific instruments. I could only guess that there is a specific fluid which would not migrate and the wrong one was employed in this instance.
Doing some research silicone fluids are used in dampers for scientific instruments. I could only guess that there is a specific fluid which would not migrate and the wrong one was employed in this instance.
curious. At rest the paddle should be above the 'drip tray' part of the trough. I wonder if cuing actions were causing a sloshing to occur. Something for me to experiment with. I wonder if the fluid was over filled or too thin.
Interesting ... owning a Well Tempered table myself I understand the importance of viscous damping. The WT fluid is silicone-based but VERY viscous (100,000 cSt) so no chance of migration. This scenario would also apply to the KAB SL-1200 fluid damper which also appears to use a rather viscous fluid (60,000 cSt). I'm also leaning towards too thin of a fluid as the culprit.
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