[Elecraft] K3 - MKII - PTT freeze

[Fabi va2up]

Hi all,
got my K3 just a couple of months ago. I'm using it with a Micro Keyer II.
90% of the time I'm on rtty. I've tested the setup extensively and
everything runs pretty smooth except:
randomly in the middle of a transmission PTT will simply freeze and the only
way out is to switch the K3 off. Switching it back on and wait a few seconds
will unlock the frozen N1MM-MMTTY software and operation resumes normally.
Sometimes though I have to shut down N1MM and restart fresh.
Now the second thing that happens (not as often) is a PTT freeze followed by
computer shutdown and bluescreen error message before automatic reboot.
I run SO2R setup with other radio being a 756 pro2 and Rigblaster plus. This
never happened on this setup. As a matter of fact, whenever the freeze takes
place, the second radio and its N1MM-MMTTY software are still running and
not affected in any way. 
I've looked into all kinds of possible rfi issues to no avail. 
This may happen 3 or 4 times during a contest. 
I was wondering if setting a separate PTT virtual port instead of using the
same as fsk may be helpful.
Thanks.


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73, Fabi va2up
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