[Amps] again

[R L Measures]

On Jul 3, 2006, at 3:30 AM, Tom W8JI wrote:

>> This gets perilously close to igniting that argument about
>> whether or not you provide a conjugate match to the tube.
>> Since most linear amps are around 50% efficient, the
>> answer would appear to be 'yes', although not
>> intentionally.
>
> The conjugate match theorem tells us nothing about what goes
> on inside the source, never has...never will. The rules or
> limits of the theorem  even state that.
> Anyone who thinks a match to the source means 50% efficiency
> apparently haven't read the theorem or can't understand what
> the model represents. All it represents is maximum power
> transfer. Nothing more.

In one of my electronics classes, the professor proved conclusively  
that maximum power transfer occurred at 50% efficiency, but I see  
amplifiers that exhibit 60% efficiency.  Please explain why, Tom.  tnx
>
> 73 Tom
>
>
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R L MEASURES, AG6K. 805-386-3734
r at somis.org