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RE: So what's the deal with CD demagnetizers?

"The other problem of course is, even if there were sufficient ferrous impurities in the metal or the ink to produce a "mild" magnetic field WHAT would the magnetic field affect that changes the sound? Is it the electronics, the laser beam (yes, I know it's electromagnetic), the servo mechanism, what?"

I'd say, from past dinking that the issue is prolly electrostatic. With a zero stat it's easy to deposit charges or remove them (if you're close, the discharge directly sticks to the surface, if you are at the "normal" working distance the ionized air plume equalizes them) and with a dog hair electroscope you can readily detect them. Now don't get upset if you're a cat person, their hair would prolly be JUST as good. Human too but I don't have any to spare, sigh. The construction is: tape a hair to a toothpick with scotch tape. Elegant...

The obvious? next step would be to lay down strips of charge and monitor the focus coil current with a scope to see if you can see their pattern. But I did't get that far since I was going to just rip everything. But I've since discovered that I'm rather fond of just playing CD's so may revisit it.


"Nevertheless, I employ both a demagnetizer and a tourmaline negative ion gun on CDs simply because I believe it's better to be safe than sorry. Hahahaha"

I'd bet on the ion gun but would surely like to know if it's the demag.

Rick

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