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.
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