From: fizzbintuesday@that-google-mail-domain.com   
      
   Jeroen Belleman wrote:   
   > Tom Del Rosso wrote:   
   >> AIUI you use iron cores for low frequency and ferrite for high   
   >> frequency because ferrite doesn't get magnetized, so why couldn't   
   >> aluminum do the same?   
   >   
   > You *want* a transformer core to be easily magnetized! You don't   
   > want it to *stay* magnetized when the current goes to zero.   
      
   Of course that's what I meant. It has to conduct a magnetic field but it   
   must not fight the induced field when it reverses.   
      
   I asked about the behavior of ferrite vs aluminum.   
      
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