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> From: Rich Measures <measures@vc.net>
> To: amps@contesting.com
> Subject: Re: [AMPS] G2DAF
To: <amps@contesting.com>
> Date: 15 July 1999 01:46
>
>
>
>
> >
> >> ..... // Another example
> >> is Maxwell's conjugate matching theorem. If it were 100% true, amplifiers
> >> could be no more than 50% efficient. .
> >
> >And the logic behind that statement is???
> >
> ? Power transfer is maximal when the resistance of the load equals the
> internal of the generator. At this point, efficiency is 50%. However,
> in practice amplifiers are c.60% efficient.
>
>Which just goes to Prof Abrey's statement that "power amplifiers either have a
>very low
output impedance or a very high one, depending on the configuration of the
circuit".
John ZS5JF
>
> Rich...
>
> R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
>
>
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