> The 3CX3000A7 has a thoriated tungsten filament? Yes; 7.5 volts @ 51.5 amps...no warm-up required. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com