Re: [Amps] Class A for AM

["Jim Tonne" <tonne@comcast.net>]

> . . . the dissipation would be 6000 watts minus power 
>  out for any given output power.

I have to share with you guys a comment from a fellow
at a major broadcast equipment manufacturer (located
in Dallas, Texas).  

We were chatting about a circa 1970 screen-modulated
AM rig.  Those things are also "efficiency-modulated" 
and so operate at about the same efficiency as a pure
linear amplifier.  We were talking about a 10 kW 
carrier output AM rig.

He made the interesting statement that "to keep the thing
cool you either modulate hell out of it or shut it off", 
which statement I found fascinating!

- JimT



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