[Elecraft] high ref warning

[ken cubilo electric]

I just noticed while running 100 watts output on 10 m ssb that voice
peaks or a whistle will sometimes give me a high reflected warning. The
vswr on the antenna is 1.3 to 1 where I was operating and I noticed what
looked to be a bit of oscillation also. Anyone else run it this? I have
the station gear well grounded to a separate rf only ground here. I
could not get the problem to duplicate on other bands only ten meters
ken w8ob #2864