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Old 28th August 2004, 11:16 PM   #11
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Hi,

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(common Frank give it a go, does`nt cost anything, we know the Belgiums are tight with their money, so this should be right up your alley, you should hear something on your high res system)
It seems to me you're confusing us lot with our neighbours up North but never mind...

Still, I already tested that quite some time ago and occasionally demag my entire system with a Densen CD.
That certainly works for me.
With tubes costing an arm and a leg, some of them almost irreplaceable, I'm rather cautious. I'm sure you understand.

DENSEN DEMAG

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Old 29th August 2004, 12:15 AM   #12
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The reason behind this is that small magnets in the signalpath are, with time, orientated in one direction. This produces a detrimental effect on the signal. The DeMagic signal actually relocates the magnets, and thereby breaks the magnetic field and it's negative effect on the sound.
aahhhHAAAAHAHAAAAHHH!! I'm sorry Frank but that just goes in the joke bin! Seriously man!

Tim
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Old 29th August 2004, 12:24 AM   #13
jlsem is offline jlsem  United States
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FWIW, nickel, like mild and silicon steels, doesn't retain a significant magnetic field. It's not a magnetically hard material.
Exactly. It occurs to me that that only a magnetized grid would have any effect on the action of the electrons (a shift in the space charge?), but the grid is usually molybdenum wire so any magnetic field (if any) would be extremely weak. I don't see how a magnetic field of any magnitude would affect noise in a tube.

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Old 29th August 2004, 12:25 AM   #14
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Yeah Frank, i`ll have to agree with Tim on this one, how can a cd produce an alternating ac magnetic field. I`ve been told you can get the same, if you play loud white noise through your system.
Seriously Frank if you have an old Tandy demagnetiser (nearly everyone had one back in the good old cassette days) give it a go on some of you old tubes.

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Old 29th August 2004, 12:55 AM   #15
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Here`s one to think about, have you ever got hold of a great used tube that`s in good condition, that has`nt be fired up for years and thought wow this is a great tube, only to find that after a few months that it has lost it`s wow factor, just maybe the tube has become magnetised, and lost it`s wow factor. I know it`s happened to me more than once. Maybe because it has`nt been fired up for years it demagnetised itself, just a theory.
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Old 29th August 2004, 01:03 AM   #16
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Default WOW AND FLUTTER IN THE GUTTER...

Hi,

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Seriously Frank if you have an old Tandy demagnetiser (nearly everyone had one back in the good old cassette days) give it a go on some of you old tubes.
Now I'm sure you guys are going to tell us all what it was that needed demagnetizing and how that worked too?

I'm not here to give courses in electronics but maybe some could do with a refreshment course?
Especially those of you toying with words such as space charges and such??

Why bother with demagnetisation if you clearly don't have a clue what it's about in the first place....Tssskkkk....

I see it coming already but no, I won't explain how a demagnetizer works.

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Old 29th August 2004, 01:13 AM   #17
imix500 is offline imix500  United States
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I used to use a massive revox unit to wipe 1/4 tape. I think the way it was explained to me was that it set all the fingers on the surface of the tape straight up and down. Don't think it would be good for "refreshing" tubes though, I remember picking up barbells with it.
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Old 29th August 2004, 07:23 AM   #18
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Quote:
Originally posted by georgehifi
Here`s one to think about, have you ever got hold of a great used tube that`s in good condition, that has`nt be fired up for years and thought wow this is a great tube, only to find that after a few months that it has lost it`s wow factor
Yeah, it's called "novelty". You get used to having this "Great, new thing, wow!" and all the flaws dawn on you. Same thing happens even to me after building an amp. I usually maintain my objectivity though. Also applies to any other reasonably complicated device, cars for instance. Just human nature.

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Old 29th August 2004, 08:53 AM   #19
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Why bother with demagnetisation if you clearly don't have a clue what it's about in the first place....Tssskkkk....
Comming from the man who thinks white noise on a cd is the holly grail.

Because Frank, that`s the only thing i did to create a sound change in the system, and it was because of the demagnetiser that the change happened, please unless you`ve tried it, do`nt comment, unless you can come up with a plausable believable answer, have an open mind until someone can close it with proven fact.
Mate i was a non believer just like you, (voodoo), until i tried it.
Something happens

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Old 29th August 2004, 10:01 AM   #20
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Originally posted by georgehifi
do`nt comment, unless you can come up with a plausable believable answer
Eheh. I think I'm the only person on this forum who has a workable theory to why everything does what it does and doesn't. Unforunately, audiophool\\\iles are notoriously shy to double blind testing so, like all, a theory it shall remain.



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