[Elecraft] KX3 radio settings for WSJT-X

[Don Wilhelm]

David,

As someone else suggested, it sounds a lot like RF feedback on 17m.
Try operating into a dummy load to see if the same thing happens - if 
not, get out the ferrites.

73,
Don W3FPR

On 8/27/2020 12:41 PM, David Haines wrote:
>
> Here are more details:
>
> All seems to be working fine on 160m-10m except for 17m, so KX3 VFO is 
> at 18.100 for the rest of this discussion.
>
> Without WSJT-X running, ATU finds a 1.1 match and TUNE button on KX3 
> works as expected.
>
> With WSJT-X running, using the WSJT-X TUNE button causes the following:
>
> 1.  KXPA100 power LED's light from left to right _twice_, in 
> synchronization with a musical ringing that rises in frequency, then 
> settle down quietly to about 100W.
>
> 2.  Around the same time Windows reports "USB device not recognized" 
> and the mouse cursor disappears.   At this point different things can 
> happen:  Maybe the cursor comes back and I can stop the TUNE at 
> WSJT-X.  Maybe it doesn't and I have to shut off the KX3 with XMIT 
> button.  Sometimes the PC freezes and needs a hard reset.
>
>