[Elecraft] Powering a K3s from a battery?

[Wes (N7WS)]

I'm not missing a thing.

All I'm saying is that if you run the LPA at 10-12 watts, according to my 
measurements*, the IMD is pretty bad.  If you have an HPA, then after it's 
kicked in, (13W in my K3S) the LPA is running at greatly reduced power.  I don't 
believe Elecraft has to change anything.  Guys with a KPA3(A) just need to avoid 
the grey area of 10-15W.

Wes  N7WS

*Remarkably, IMD measurements I made on my K3S using modest equipment correlated 
within 1dB or less to measurements made by Elecraft, on the same radio.

  On 12/30/2015 12:08 AM, Jim Brown wrote:
> Something you're missing, Wes. The 100W amp doesn't kick in until you ask for 
> more than about 14W. So at 11-12W, you're seeing the IMD of the QRP exciter 
> stage running near it's maximum power.
>
> I'm wondering if it might be practical to modify the control software so that 
> the 100W amp kicks in at lower power levels. Are there other consequences?  
> Wayne?
>
> 73, Jim K9YC
>
> On Tue,12/29/2015 8:19 PM, Wes (N7WS) wrote:
>> Something else to note, even at 14V, running a K3 at 11-12 watts is a disaster. 
>