[Elecraft] Powering a K3s from a battery?

[Fred Jensen]

Ummm ... I don't think that was what was suggested at all.  I read the 
post to be an observation of a *relative* condition.  All amplifiers [at 
least that I've ever encountered] exhibit increasing distortion near 
their rated power limits.  I've always assumed that's why distortion 
numbers are almost always accompanied by the power when the measurements 
were taken.

My K3/100 is a K3/10 below about 15 watts ... the 100 W amplifier 
switches out of the circuit.  I think all that the post was trying to 
point out is that, from 100 W downward, the distortion will decrease 
*until* the KPA3 cuts out.  At that point, the LP amplifier/exciter is 
near it's max power, and it's distortion will probably be higher than 
the values from the KPA3 operating just above that power.  In any case, 
absolute distortion from a K3/<anything> is still among the lowest in 
the marketplace.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 12/30/2015 2:13 PM, Edward R Cole wrote:
> Wes,
>
> So you are saying all of us with K3/10 should never run at 10w+ because
> the LPA is a terrible producer of IMD?  Does that also apply to the KX3
> which is also a 10-12w radio (160-24m)?
>
> I'm finding that hard to swallow considering the QRP background of the
> Elecraft owners.