The USB port on K3S also has the DTR and RTS information available. 

Sent from my iPhone
...nr4c. bill


> On Jan 12, 2017, at 1:15 PM, Nicklas Johnson <[email protected]> wrote:
> 
> Unless I'm mistaken, doesn't the K3S connect directly via USB though?  If
> the problem is happening because of common mode on the USB cable, there is
> no physical RTS line involved like there would be in an old-style COM/RS232
> device- there is only serial data going across a USB cable to a logical COM
> device inside the K3S.  It most likely wouldn't change anything in this
> case.
> 
>   Nick
> 
>> On 12 January 2017 at 10:08, Joe Subich, W4TV <[email protected]> wrote:
>> 
>> 
>>> On 1/12/2017 11:05 AM, John Stengrevics wrote:
>>> What’s the solution, ferrites on the USB cable?
>> 
>> Stop using CAT Commands for PTT!  Instead set CONFIG:PTT-Key to
>> RTS-OFF and use RTS.  WSJT-X supports PTT Method = RTS by setting
>> the PTT Port the same as the CAT Port.
>> 
>> 73,
>> 
>>   ... Joe, W4TV
>> 
>> 
>> 
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> 
> 
> 
> -- 
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