[Elecraft] K3s USB com port issue

[Don Wilhelm]

Howard,

How is the K3S RS-232 menu parameter configured.
If you are using the internal USB port in the K3S, it should be set to "USB"
If you are using an external USB to serial adapter, set the parameter to 
38400.

The COM port that is assigned by your PC should be the one you need to use.
A side-note - if you always plug to the same computer USB port, that COM 
port number should stay the same, but if you plug into a different USB 
port, the COM number will likely change.  Such is the state of things 
with the computer OS and we have to live with it.

For the PTT, the same COM port can be used for both rig control and 
PTT.  Set the K2 CONFIG menu PTT-KEY parameter to agree with your 
application - PTT will be driven with either RTS or DTR - the 
application and the K3 must agree on which one is used.

73,
Don W3FPR

On 9/20/2016 5:25 PM, Howard Sherer wrote:
> I am running a K3s and the issue is with the USB com port. First, the com
> port assignment is com 27 which seems strange for my simple PC set up. I
> have tried to go into the Windows control panel and change it to a lower #
> available port, but it will not take, but this is not the issue.
>
>
>
> My problem is that the com port will sometimes be recognized by the K3
> utility or other programs as either 9600 or 38400 baud on a totally random
> basis. If I connect at 9600 the K3s will after a while change its port rate
> to 38400 and I have to close the program that I am using and re start it at
> 38400. This will work fine for a while until the K3s then resets it baud
> rate again to 9600 and I have to re start the program that I am using.
>
>
>
> Using programs like WSJT-X which now has rig control is very frustrating
> and I usually just turn off the rig control and use the com 27 only for ptt
> control. I have even had issues while using WSJT-X and the rig control,
> that will change the K3s com port to a new baud rate between Rx & Tx
> transitions.
>