You may have fallen afoul of what seems to be a "race condition" in the
K3's firmware. When software (CAT) PTT and hardware PTT (from any of the
hardware inputs, be it the AUX jack, the PTT IN jack or RTS or DTR on
the RS232 port) are both configured from the same software, and both
methods trigger at the same time, sometimes the K3 fails to switch back
to receive. It doesn't necessarily happen every time; there may be minor
timing differences in the software that affect whether it happens or not
on any particular cycle. This problem has been around for years,
probably since day 1. I have seen this from the beginning with my
2008-vintage K3, and I am told that there are other transceiver models
besides the K3 that have similar problems.
The solution is never to have two methods of PTT configured in parallel.
This is a case where "belt and suspenders" is less reliable than either
the belt or the suspenders alone. If you have Fldigi configured to use
CAT for PTT, then do not connect or configure any of the K3's PTT
inputs. If you want to use hardware PTT, e.g. from the SignaLink, then
disable PTT via CAT in your software.
Incidentally, the hung up state is not an "indeterminate" state as you
suggested in your first post. The K3 is in transmit; the reason nothing
is being transmitted is simply that the software is not sending any
audio to the radio, exactly as if you were in SSB with the rig in
transmit but no sound coming from the microphone.
73,
Rich VE3KI
WA6PZK wrote:
The good news is I'm beginning to see the possible cause of the problem, and
it appears to be in the CAT rig control. When I finally get CAT disable,
requiring a restart of FLDIGI, the problem seems to have mitigated.
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