I see TX power overshoot when there is too much audio drive. The 5th bar
should be flashing not solid on the ALC meter. Also, do a TX GAIN
calibration procedure from the K3 Utility.
My KPA500 has endured some massive peak power overshoots without
destruction (1200w) before I readjusted things.
I occasionally see a wee bit of overshoot as seen on my KPA500. I'm
driving it from my K3S at about 20 watts for about 400 watts out on
SSB. Occasionally I'll see a 450 or 500 watt indication on the LED
bargraph. The KPA500 doesn't seem to mind.
If I set the drive power to 20 watts CW mode,
I have a 6xxx K3 (not S). The output of the radio is monitored by an
LP100A wattmeter set to peak reading. The K3 drives an AL80B. I have
just done a TX power calibration. With the K3 power output set to 60
watts and running SSB I will see about 64 watts output but occasionally
see 74 watts pea
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