Check out this web site. They even have mu-metal foil and will custom make from what I read. Good luck http://magnetic-shield.com/faqs.html -- Erick KE1LW at ARRL.NET Listserver Subscription:listserv at listserv.tempe.gov - "subscribe heath 'name' 'call'" Listserver Submissions: heath at listserv.tempe.gov Listserver Unsubscribe: listserv at listserv.tempe.gov - -"signoff heath"