Bill - I just use the Elecraft supplied serial-USB cable. There is no 
difference between JT65/JT9 and WSPR-2 as far as making the rig transmit. Most 
of us use the VOX (preferred) method of having the K3, K3s, or KX3 go into 
transmit. When you put WSJT-X into WSPR-2 mode, you do have to manually click 
the Enable TX button. If your audio settings are sufficient to transmit JT65 
and or JT9, nothing special is needed for WSPR-2.

Jim / W6JHB


> On   Monday, Jun 27, 2016, at  Monday, 12:24 PM, Ai4PF 
> <[email protected]> wrote:
> 
> I regularly and successfully use all available digital modes. I recently
> downloaded the updated version 1.6 of jt65x that includes wspr2. The 
> instructions say an interface cable using a serial port port to key the PTT
> line is required in order to TX. I already have this connection going from
> the rs232 serial to the the rear of the P3 and then to the K3, but no matter
> what  I can't get the program to go into TX mode.
> 
> Does anyone have a similar working setup? Appreciate any suggestions.
> 
> Bill, Ai4pf 
> 
> 
> 
> 
> 
> --
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