The difference is likely due to any averaging you have dialed in. It was
driving me nuts for a while until I figured out that the K3 S-meter
seems to read the peak value of a signal while the P3 will show the
averaged amplitude. I programmed "PEAK" onto one of the PN# buttons on
the P3 and when I tap it the two amplitudes are in very good agreement
with the default calibration. I have a new enough K3 (#4113) that it
has the higher IF output designed for the P3.
73,
Brian, K0DTJ
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