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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: Frictional heating of vinyl posted by Mark Kelly on October 27, 2006 at 07:08:49:
Excellent results, but the "usual" rebuttal to that is that, of course, people have HEARD the temperature changes distorting the record, therefore the theoretical results are wrong. Which is a load of BS of course, but it does suggest that an empirical observation is needed to lay this to rest once and for all. I can provide two counterarguments to your analysis, but they're both sort of shaky.The first counterargument is that, as others have mentioned, the actual temperature of the stylus ought to take into account the very small size of the stylus. I would expect the "observed" thermal conductivity to be heavily influenced by the conductivity of the air and of the cantilever material. I do not posess the knowledge to numerically evaluate this though, I'm not a trained materials engineer, and I haven't done a heat transfer problem since college, so I could be blowing that out of my ass.
The second counterargument is that record degredation through repeated playback of records HAS been observed; all of the root causes have not been isolated yet, and temperature-related effects are among the suspects. I was just reading Audio Magazine's review of the Audio Technica LifeSaver the other day, and the numeric test involved playing back a test record 100 times and observing the before/after harmonic distortion. (LifeSaver reduced the THD after 100 plays btw.) LifeSaver is in the same class of treatment as Gruv Glide, as I understand it - it's basically a lubricant that reduces the coefficient of friction and so would have a direct effect on the temperature at the stylus-vinyl interface.
I'd figure the best way to confirm or disprove this is to measure the temperature of the stylus optically. Given the temperature increases thrown around (200 F at least), that ought to stick out like a sore thumb on any sort of temperature-sensing infrared camera. Just point it right at the stylus, and as close to it as you can get.
Does anybody have a lab infrared sensor on them? :)
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Follow Ups
- Maybe confirm this with an infrared camera? - Axon 10/27/0617:08:47 10/27/06 (5)
- I'll have a Raytek thanks. You paying? - Mark Kelly 17:22:13 10/27/06 (4)
- A Vermont friend from Snell Infared just visited me in Alaska. . . - hiatt@alaska.net 23:00:45 10/27/06 (3)
- Can you find out what the spot resolution is? - Mark Kelly 23:29:48 10/27/06 (1)
- I will get back to you on the resolution and some prediction . . . - hiatt@alaska.net 08:05:53 10/28/06 (0)
- As a follow up, should a baseline temperature reading be taken . . . - hiatt@alaska.net 23:05:25 10/27/06 (0)
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