KXPA100 Input Current vs Output Power

[Tim McDonough N9PUZ]

Is there a chart or formula that describes the input current required for a
KXPA100 amplifier at various power output levels? In a battery operation
scenario I'm curious about the current draw at say 50W output vs. 100W
output.

Tim N9PUZ
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[Elecraft mailing list]

Is measuring it out of the question?

Regards,

Mike VP8NO



On 22/03/2019 11:51, Tim N9PUZ wrote:
> Is there a chart or formula that describes the input current required for a
> KXPA100 amplifier at various power output levels? In a battery operation
> scenario I'm curious about the current draw at say 50W output vs. 100W
> output.
>
> Tim N9PUZ
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[Tim McDonough N9PUZ]

Measuring it would be a perfectly acceptable and desirable solution. Except
I do not have the amplifier here.

Tim N9PUZ

On Fri, Mar 22, 2019 at 11:35 AM Mike Harris via Elecraft <
[hidden email]> wrote:

> Is measuring it out of the question?
>
> Regards,
>
> Mike VP8NO
>
>
>
> On 22/03/2019 11:51, Tim N9PUZ wrote:
> > Is there a chart or formula that describes the input current required
> for a
> > KXPA100 amplifier at various power output levels? In a battery operation
> > scenario I'm curious about the current draw at say 50W output vs. 100W
> > output.
> >
> > Tim N9PUZ
>

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[David Woolley (E.L)]

Whilst I can't give you quantitative answers, I would expect there to be
a constant term and a square root power term, so my guess is that 50W
would take about 80% of the 100W current and 10W about 38-40%.

These are peak envelope currents.

--
David Woolley
Owner K2 06123

On 22/03/2019 14:51, Tim N9PUZ wrote:
> Is there a chart or formula that describes the input current required for a
> KXPA100 amplifier at various power output levels? In a battery operation
> scenario I'm curious about the current draw at say 50W output vs. 100W
> output.
>
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