Now open again Device Manager-COM ports and see which is the second COM port /in my case is COM13/

Second port is for CW

Now start PowerSDR -Setup-DSP-Keyer and insert the COM port and Key Line - RTS ,

also in the window of PowerSDR switch MON , Drive =100 , bookmark Break in - Enabled

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Now you can turn the keyer in SKY-221 with mono 3.5mm jack.

In conclusion, I want you to say that this input KEY designed the control of another computer to work in contests. If you use a regular key or automatic key must have enabled their buzzer for sound SKY-221 comes with a one second delay close!!!

Better way of doing it is CW QSO - CWX of PowerSDR with the computer keyboard and memories of CWX....

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From 17 July 2013 :