"Bob W6TR said: A better idea would be to find a Gates edge wound inductor. It already has the rigidity and the mounting hardware is in place. I'm thinking of one with a 5" diameter, about 8" long." Bob, I totally agree, I'm using a Gates inductor in my current 160 meter amp building project: http://w2dtc.com/w2dtc-class-a-rf-amp/2007-0205-pi-network.jpg 73, Ken Barber