[Elecraft] K3: display question with high SWR

[DOUGLAS ZWIEBEL]

I was just chatting with another K3 owner about the merits (or not) of
the K3 tuner.  I commented that I have resonant antennas on all bands
except for 75m where my ant is cut for the bottom end of 80m.   I
noted that if I set the K3 to 5 watts power and the display and then
transmit (cw), I still get 5 watts "out" even on 75.  Pretty much the
same at all other power levels up to say, 60 watts, where it seems to
level off.  Since that is plenty of power, I don't see why I would
"need" the tuner.

However, I note (for the first time...never looked before) that when I
transmit on (say) 3.8 (75m), instead of the usual frequency display, I
get something like "3.5 - 1"

1.  What is that?

2.  I assume that if I operate into a "bad" SWR, that the radio will
protect itself and prevent me from destroying it.  Is that correct?

Thanks,
de Doug KR2Q