Rich says: >Mo' complicated is not mo' betta. Maybe, but a rheostat for a tube with a 5kW filament is not the best way.......even if you're not in California where you can't waste that much power! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com