Engage brain before typing. Ref my previous message about twisted wires: 1. I meant total circumferential surface area, not cross section, to get the right amount of current flow area allowing for skin depth. 2. I meant 3/16" not 3/8" tube. Sorry. Steve -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com