> Tom says:
>
> >You can not use those models to describe power transfer in
> >systems where source impedance varies with load impedance, and
> >that is pretty common, except at one power or load impedance.
>
> Yes. Agreed. So what is your model for the Class AB PA?
Depends on what I need the model to do. If it is dissipation, there
is no model that works. It has to be the "real thing".
If it is maximum power transfer, I just use a simple resistance and
reactance and work the tank backwards.
If it is a varying load impedance, and the goal is constant current or
voltage, the design goal is a lot different than a conventional PA.
The model that works depends on the application. In some cases
a Thevenin or Norton won't work, unless the model gets changed
with operating parameters.
73, Tom W8JI
w8ji@contesting.com
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