Mine does exactly the same thing. I even ran it through factory service to be sure there wasn't a problem with the LPF module that might be causing trouble. They calibrated it and returned it with a clean bill of health. It still draws significantly more current on 20 than on any other band.

73...
Randy, W8FN

On 6/19/2020 8:46 AM, Rich wrote:
I just received my K3S back from repair and all seemed OK. However it appears to draw much more current on 20M than any other band.   22 - 24 amps.  I have tried two different 20m antennas and a dummy load.

All other bands are 20 amps or lower.  Some as low at 17amps.

Power Supply voltage per K3s display 14.0v standby and 13.3 on TX

First off is this actually something of concern?

I hate to do a calibration as it was just done by Elecraft service two weeks ago.
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