[Elecraft] KX3 KXUSB vs KXSER interface

[Val]

Well, this means that KXUSB is unusable for CW operation. We will need 
"full" USB adapter, carrying DTR line like KUSB, DB9 socket, than a 
transistor key and two 3.5mm plugs - one for the KEY jack and one for the 
COM port. How spoiled are we by K3, hi.

73, Val LZ1VB

>I would think that whatever external keying device you are using would have
> to connect via the KEY jack. This would be a contact closure (or the
> equivalent) to ground, with the KEY jack in straight key mode, via the KX3
> menu.73,
> Bruce, N1RX
>
>> After KXUSB terminates in a 3.5mm plug, there is no place for DTR line.
>> Then how is arranged the CW keying by a computer?
>
>> 73, Val LZ1VB
>
>
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