I am trying to diagnose a problem with my K3/KIO3 which surfaced during
the ARRL VHF contest. Previously, I had used this setup for hundreds of
QSOs on HF.
I am using an external Startec USB soundcard. The KIO3 IN jack is
cabled to the speaker output of the soundcard. The KIO3 OUT jack is
cabled to the soundcard's LIN IN jack. Now here's the problem. When I
transmit with all cables connected, and listen to the monitor on the
headphones, I hear a tremendous blast of polyphonic audio so long as the
KIO3 OUT line is connected to the soundcard. If I pull that line from
the sound card's LIN IN jack, then the FT8 audio in the monitor sounds
completely normal.
It seems at least possible that the polyphonic audio bleat is being
produced by feedback somehow occurring between LIN IN and LIN OUT on the
KIO3. Two possibilities - either the sound card has failed in this
peculiar way, or there is some setting, either in my WIN 10 computer's
sound settings or in the K3's settings, that is causing the coupling
between LIN IN and LIN out.
Any suggestions gratefully received
--
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
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