Recently I've made some configuration changes at my remote station that
should in the end improve things. In the short term, however, it has
caused problems when working voice. Specifically I was getting feedback
if I raised the line out level on the PC too far past a certain
threshold which seem to depend on the K3 compressor settings (in case
you are wondering, yes, the K3 monitor level was set to 0). Despite
these problems, I was able to make some 40 meter SSB contacts Sunday
morning during the ARRL DX Phone contest.
On Sunday afternoon, I connected to the remote with about ten minutes to
go in the contest and heard PY0F calling CQ on 20 meters with a very
loud signal. Not having touched the settings from the night before, I
figured I would tweak the tuning on the KAT-500 and then just call him.
Things did not go well. The rig broke into audio feedback and I lost
transmit/receive control for what seemed like a forever, but was
probably in reality only about 15 seconds.
After I regained control of the rig, I power cycled the rig and then
power cycled the computer (I can do that remotely). The K3 still works
fine on CW, but I can no longer operate SSB. TeamViewer indicates I am
getting audio to the remote site, but the radio no longer responds. I've
tried both VOX and manually switching to transmit. Either way, I get
nothing. I even tried playing a local audio source on the computer at
the remote site which should have gone straight into the K3. I still got
nothing.
IS IT POSSIBLE TO DAMAGE THE LINE INPUT OF THE K3 IF IT IS OVERDRIVEN BY
A SOUNDCARD LINE OUTPUT OR DOES THE K3 SOMEHOW SELF-PROTECT? IF THE
FORMER, WHAT PART IN THE K3 SERVES AS THE "FUSE"?
I know it is premature to assume the K3 is damaged as I haven't
physically been to the remote site test the rig since the incident, but
I wanted to understand what the worst-case scenarios might look like.
Thanks & 73,
Mike W4EF.................
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