Hello William,

Get a copy of Amidon's catalog which gives detailed suggestions for powdered
iron and ferrite materials, based on many years of experience.
www.amidoncorp.com


Absolutely. I literally wore one of those catalogs to the point where
you could see through several pages.

Then there are the ARRL Handbook and their Antenna Book. Both well worth
every penny.

Regards, Joerg

http://www.analogconsultants.com