cartridge demagnetization


Are there any telltale signs that your phono cartridge [especially MC] needs to be demagnetized, or is this just a preventative maintenance issue?
boofer
In my beginning of my audiophile career, you know, young, no money but enthusiastic and hungry for every tweak which was able to lift my system to a higher lever without investment in serious electronics...to make a long story short...I grilled the coils from my Lyra, my Dealer smiled and sold me another one. Super.
In all the following years I never used the Demag grill again and guess what...I never even thought about it until I read this thread. I can live very well without that but others may think different. My first question to a cartridge seller always was "Did you demag it with a battery unit" and when he said "yes", I stopped any further discussion at once. One of my golden rules ...
I should mention for the benefit of anyone who's just tuned in to the demag argument that Lyra carts such as the Delos use a paramagnetic grade of iron for the coil formers, i.e. will "conduct" magnetism but resist storing it, so residual magnetism should be minimal anyway?

Exactly how much effect any small degree of permanent magnetism will have on Lyra carts and certain other makes of MC is a matter of debate.

I'm sure JC will correct any misinterpretations that I'm guilty of.
Lyra carts such as the Delos use a paramagnetic grade of iron for the coil formers, i.e. will "conduct" magnetism but resist storing it, so residual magnetism should be minimal anyway?

I think you mean "soft magnetic" instead of paramagnetic.

dave
Thanks for the constructive comment, Intactaudio.
I was looking for a word that described the properties of "soft" material but turns out paramagnetic wasn't it ;^)
Cheers,