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In Reply to: RE: I wonder how these stack up to my trusty RS bulk tape eraser? posted by kenster on July 24, 2007 at 16:42:31
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Follow Ups:
LP's are simply vinyl plates, for the most part and not supposed to be magnetic at all. Most molecules are paramagnetic, though. and I believe the long vinyl molecules tend to be polar in nature (one end charged positive or negative).
Since they claim there is momentary melting when the stylus runs through the vinyl: that, coupled with the strong magnetic field of the cartridge will, I suspect, slowly reorient the polar molecules over time and repeated play. Applying a degausser will partially return the vinyl to an amorphous state, instead of having a magnetic orientation which can create induction.
Yeah, I know it sounds pretty bizarre, but at least I am not claiming 'morphic' resonances here. In my experiences, magnetism is a an often overlooked factor in many electronics: not simply from an actual magnet but also by induction. Small field build up can affect the significantly larger fields, like a cartridge. If you have a powerful enough degausser, try degaussing a TT platter (I hear positive effects from doing it to an LP-12 aluminum platter and even to VPI acrylic platters !).
As I have written before, the last generation of big screen CRT TV sets had adjustments to compensate for the orientation of the picture tube due to the Earth's magnetic field. Eralier models had you sselect from north south orientation to east-west. Later ones had a variable scale in which you set the screen adjustment.
If the effect is visually noticeable, I have no doubt that these magnetic fields, and others, can also affect audio products.
Stu
Hi.
Yes, we should not overlook existance of stray magnetic around our audio rigs that may affect the music. That's why I always have a map compass siiting on my rack to detect any magnetic influence around.
BUT...NOT "most molecules are paramagnet". Many inorganic salts, with UNpaired electrons circulating its atoms, particularly in hydrated forms, are, e.g. CuS04.5H2O
Vinyl records are made with polyvinyl chloride, a most popular sorta 'toxic' plastic material used to mold nearly everything we use daily, including audiophiles' beloved gramophone discs.
It is a polymeric organic compound, sort of colourless & when mixed with carbon black gives us the black look vinyl records.
Carbon black, made from incomplete combustion of mineral oil based hydrocarbons, is not paramagnetic either as far as I know.
So to claim applying a strong magnetic field by using a demagnetizer on a PVC record is a parapsychological effect, like unfounded sonic improvment by some rainbow films & by freezing a picture, & the likes.
However, demagnetizing a CD is another story. The slumnimum alloy used to mold a CD disc comes with a very very minute contaiminaition of other metals
Here the vendors of CD demagnetizers sell their CD demagetizers by claiming such very very minute alient metal contamination inside the CD aluminum alloy can cause adverse effect to any CD music.
You believe such blow-things-out-of-proportion sales pitches? I don't.
'Cause I tried one years back for a friend who brought a brandname CD demagnetizer to my home to audition its effectivness.
I was nearly sweating my pants when my beloved test CD soundtracks sounded so aweful & so distorted immediately after the CD was treated.
But thank Almighty, after a couple of listening, the horrible sounding effect apparently caused by the CD demagnetizer, died away & the orginal surperb sonic restored 100%. But I swear to God, there was absolutely no imporovement in the sound after the sorta demagnetization treatment, if not worsening it.
CD demagnetizer did not work out for me, period. Yy friend returned it to the vendor afterwards.
Hence my query on your LP finding let alone CD.
c-J
I've been demagnetizing my LP's and CD s , oh for least 25 years now.
Any placebo effect has long worn off. In fact, I find that surface noise on old LP's are significantly reduced. The effect is not noticed with those plastic records: Those cheaper LP's which do not use vinyl, but are made from a hard brittle plastic, typically Disney records, and some pop stuff, usually on budget labels.
As for CD's, I have tried the degausser on expensive machines as well as cheap machines and have gotten the same results. I can even see a slight, but noticeable change with Dvds, especially with the latest Hi def sets.
I use a bulk tape eraser, BTW, and not any 'high end' gizmo. The eraser also serves me well for erasing tapes, at least when I had them. The eraser itself must be maybe 30 to 35 years old, hardly a boutique item. I still have that large eraser, but now use a Geneva brand degausser as it advertised the highest degaussing current (2800 gauss) for a hand held unit (it just made using the degausser so much easier).
I believe when I had tried the degausser, no one had anything on the market yet. I am not claiming to be first about this, however, as I was simply experimenting with magnetism, having purchased some Mu metal and such and had some interesting experiences with playing with the metal. I admittedly did have the Sumiko 'Fluxbuster', a cartridge demagnetizer which did work quite well and that led me to other experimentation especially in regards to magnetism.
Obviously your experience was negative. My experiences have not been negative at all, and others who have tried it report similar results to mine. I will not speculate as to why your experience was so negative, but if the plastics are indeed so non magnetic, the result should have
been null: no difference, wouldn't you think?
Stu
PS. Finally got your little parcel off.
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