> The 3CX3000A7 has a thoriated tungsten filament? >From an Eimac reference sheet: "Filament/Cathode......Thoriated Tungsten Voltage.....7.5 Volts Current.... 51.5 Amps" See: http://www.eimac.com/catalog/17235.htm 73, Jim KH7M -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com