From: Edward V. Phillips[SMTP:ed-at-alumni.caltech.edu] Sent: Tuesday, November 18, 1997 1:44 PM To: tesla-at-pupman-dot-com Subject: Re: Ferrite types and chokes "Iron powder is definitely the material of choice for toroidal cores for our apps. " That will saturate too! Calculate the flux density before going to the trouble of making them. Ed