Hi Chuck, We had a bit of a discussion about that idea here a couple years ago. Take a look at the thread starting with: http://lists.contesting.com/_amps/2003-02/msg00468.html In your application, I don't believe that you'll gain any size advantage over an air coil except for being able to mount it in close proximity to the chassis. 73 & Good morning, Marv WC6W ************************* -- "Partain, Chuck" wrote: What is the issue(s) with using only toroids for a tank circuit? (thinking out loud ) chuck _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ________________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today!