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Old 4th October 2002, 04:04 PM   #11
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To put my cards on the table to start, I am very cynical about this subject.

I can see only one reason why static would affect the replay of a cd, and that is by attracting and holding small particles of dust onto the surface of the disc, which are, although tiny, large enough in relation to the size of the laser beam to cause missed or incorrect data, and thus causing the players error correction circuitry to kick in, which has audiable results.

A static charge will not effect a laser in any significant way at all, I can best illustrate this with an example. The sun will bend a light beam by a few hundredths of a minute of arc, a tiny amount only visible at astronomical distances. Despite the suns huge EM field, about 99% of this bending is due to gravity. In comparison a static charge of even 20kv , which is way more than would ever be found on a cd, is insignificant.

Yes Peter, it is quite possible that the metallic substrates on a cd could become magnetised, I have no argument with that, but the field will not affect the laser beam, for the reasons stated above.

If a disc is magnetised though, and is spun around rapidly, it will generate a EM field, as Faraday and others discovered. But, compare this field to that one produced by the highly magnetised motor that is spinning the disc and it pales into insignificance as an effector.

It must be fairy dust then
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Old 4th October 2002, 04:30 PM   #12
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Wow, am I the only one here that do not have all the facts?
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Old 4th October 2002, 04:42 PM   #13
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Chris, none of us have all of the facts.

Eric.
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Old 4th October 2002, 04:47 PM   #14
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Quote:
Originally posted by mrfeedback
I believe the Bedini Clarifier works on the same principle as the Mpingo disk.

And what principle is that ?.

Eric.
The principle of expected outcome for the purchaser, and expected income for the seller.

MR
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Old 4th October 2002, 05:16 PM   #15
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Default Some facts for me self, self and only self for a FACT!

Quote:
The principle of expected outcome for the purchaser, and expected income for the seller.
Can not comment on the Mpingo Disk, never try it.
I was very skeptical with the Clarifier at first, but afer borrowed one from my friend for a weekend, I was convinced to get one for myself, and can not do without one now. That said it seems it has no impact on the sound quality with the CD player in my car with the treated CDs tough.
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Old 4th October 2002, 05:18 PM   #16
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Quote:
Originally posted by MRehorst


The principle of expected outcome for the purchaser, and expected income for the seller.

MR
And you tried both?
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Old 4th October 2002, 05:26 PM   #17
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Default Re: Demoneytiser

Quote:
Originally posted by mrfeedback
Peranders, I had one of those years ago and it was not nearly as effective as the solenoid demagnetiser, although it did a good job of remagnetising.
USD$25.00 - you must be kidding me -
Sorry, 25 SEK, 2.5 USB

When I demagnetize my tools they become "unmagnetic" (for my needs) but maybe this isn't enough for your friend?
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Old 4th October 2002, 06:18 PM   #18
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Quote:
Originally posted by Peter Daniel


And you tried both?
No, I haven't. These are among the things I don't have to try to know about.

Your mileage may vary, of course...

MR
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Old 4th October 2002, 07:15 PM   #19
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I find one or two magnetised screwdrivers useful for picking up tiny screws and other parts I may have dropped in confined spaces

I even went out and bought a a small, but very powerful, magnet on the end of an extendable wand, and its now one of my most valued tools!
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Old 4th October 2002, 08:53 PM   #20
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Default Demagnatizing CDs?

"Two points to consider:

1) CDs are read optically. There is no magnetic pick-up, which is fortunate because
2) the shiny layer in a CD is either gold or aluminum, neither of which is magnetic. There is nothing to "demagnetize".

I believe the Bedini Clarifier works on the same principle as the Mpingo disk."


1. The mechanism used to focus the laser assembly is electro-magnetic.

2. The label ink or paint on a CD can contain iron oxide pigments or other magnetic materials.

http://www.paintsrawmaterial.com/products4.htm
http://uu77.com/pigment/Default.asp
http://uu77.com/pigment/msds.asp

http://es.epa.gov/techinfo/facts/safe-fs.html
cobalt in some blue oil and acrylic paint pigments
chromium in paint pigments

Alice
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