>
> It would seem to me that using a swamping resistor
>at the cathode of a cathode driven amp would get
>rid of excessive drive power and also limit the
>maximum swing in the load value the cathode shows
>to the source, but would do nothing to prevent harmonic
>currents from finding they're way back to the source.
> I would also think besides the obvious lack of a path
>for harmonic currents, in order for a swamping resistor to
>allow the amp input to look like a constant load to the
>source the resistor would have to be considerably
>lower in effective "R" than the cathode. And if that
>were the case the swamping resistor would draw
>more power from the source that the amplifier would.
>
// Nice analysis, Mark
cheerz
>On Fri, 18 Jan 2002 19:26:56 -0500 "carl seyersdahl"
><carlseye@tampabay.rr.com> writes:
>>
>> In reference to the subject matter. I have an article here written
>> by a ham
>> in spain and published by Svetlana several years ago. This gentleman
>> built
>> an amp, single 572B, using a home made rf choke and input
>> transformer
>> combined, and using a large swamping resistor , about 75 ohms at 40
>> watts,
>> untuned input..
>> Just how good it turned out I can't say, but it is an interesting
>> thought
>> on the subject.!! I mention this only in the interest of theoretical
>> discussion.
>> I have a copy of the article if anyone is interested
>> have a good day all.
>> carl / kz5ca
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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