The final RF stage (in this case) is operated class C and the collector (or plate) supply (Vcc or B+) is "modulated" - a process called "high-level modulation". Any succeding stages, however, must be LINEAR in nature and therefore cannot be "class C" stages ... Jim ----- Original Message ----- From: "David VanHorn" To: Sent: Wednesday, July 11, 2001 11:31 AM Subject: Re: [EE]: Class C amps > > This was introduced something like 50 years after class C amplifiers >were first used in AM transmitters. You'd have thought it was a mature >technology by then! How is it that AM transmitters use class C? I thought that would destroy the AM, or do they do that in front of a modulator?? -- Dave's Engineering Page: http://www.dvanhorn.org I would have a link to http://www.findu.com/cgi-bin/find.cgi?KC6ETE-9 here in my signature line, but due to the inability of sysadmins at TELOCITY to differentiate a signature line from the text of an email, I am forbidden to have it. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads