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.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
