Products > Dodgy Technology
Demagnetising vinyl, CDs for 300 bucks?
Asn:
Hello my dudes :)
I am looking at the following product, and I have not found a single opinion doubting that it works, but I doubt that the magnets inside are worth more than 3 bucks, instead of the 300 price tag:
https://walkeraudio.com/?product=talisman-magnetic-optimizer
Some review states there are "a number of magnets of various size and strength inside", but I think stacking up a bunch of Ebay magnets does the same trick?
They have instructions, of course:
https://walkeraudio.com/wp-content/uploads/2012/07/Talisman-Instructions.pdf
Any guess as to what's inside? (= can I make my own?)
Also, people now "condition" their RCA and power cables, as well as speaker drivers with this...
ataradov:
This site is an idiot's gold. There is a chunk of turned brass for $2200 https://walkeraudio.com/product/record-clamp/ .
Where do people that stupid get this kind of money?
Rerouter:
a proper demagnetiser doesn't work with physical magnets, you just pipe mains into a transformer core (iron) to build a high intensity magnetic field, and by this field rapidly changing direction with high intensity fields, leaves the item with a random assortment of magnetic alignments that mostly cancel.
The key is the feild strength where it hits your metal must be higher than the permeability of the material, but in short if it can demagnetize a standard magnet, it will work for anything.
so take a normal EI transformer core, cut a corner so there is a gap of about 1cm, and run your record over that gap, the magnetic field lines intersect through the record to complete the loop, which demagnetizes the effected area in a bit of a figure 8 pattern.
If you wanted to make a machine to do it, either shape the metal and size the number of turns to cover the radius, or move a much smaller EI core across the radius.
ataradov:
There is also nothing to demagnetize on vinyl and CDs :) So permanent magnets will be fine too, event though they would cause even more problems if this thing actually did anything.
Rerouter:
I suppose someone could try and demagnetize there speakers :p
All good scams start with the faintest whiff of truth, most records are injection molded plastic, however they do pickup a very small trace of the master disks nickel plating on the surface from the pressing (this is why master pressing disks are only used X many times) the quantities would be stupidly tiny, but of cause nickel is a ferromagnetic material. thus the scam.
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