Carl

I have not experienced any of this type problem.  I have my CONFIG:PWR SET to PER BAND  so that the K3s switches power levels depending on if the KPA1500 is OP/STNBY.

Since you are saying this depends on your output power then would first look for RF feedback issues.  Are you using the Aux cable between K3s/KPA1500?

Dave K5MWR



On 4/1/2018 2:11 PM, Carl Yaffey wrote:
When running the KPA1500 at full power, sometimes the power will fluctuate. 
EXAMPLE: I was checking in to the Elecraft SSB net a little while ago. While 
transmitting, the power dropped to around 400W. This has happened on 20M CW as 
well. I wonder if the K3S output is dropping. (??).
If I run at 500W or so, no problem.

Carl Yaffey  K8NU
Recording studio.
cyaffeyno_s...@gmail.com
614 268 6353, Columbus OH
http://www.carl-yaffey.com
http://www.grassahol.com
http://www.bluesswing.com

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