Back from my summer vacation, my K2/100 and PC donĀ“t get along anymore. Everything else works fine, also the communication between the K2 and the KAT-100, although initially there was a slight trouble with the keyer (no dits or dahs,just one steady note, whichever paddle pressed). I have tried with three different PC:s and with two different cables (one built new for testing). I am convinced that the PC communication settings are correct. I have followed the troubleshooting suggestions. Any suggestion on what to do next is very much appreciated. E.g. how do I conclude if this is a hardware or a software issue? Are there any known compatibility issues between firmware 2.04 which I recently installed when doing the keying modification and the 1.06 firmware (old) of my KPA-100? Thanks Per SM0WRA K2/100 no 1623
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