[Elecraft] No TX output in data mode

[Bob McGraw K4TAX]

I've found that all USB cables are not created equal.  Some are 
apparently better shielded than others.   I tried and replaced 3 or 4 
different ones / brands / lengths, in the same location and 
configuration {between my K3S and my laptop} before I found one that did 
not cause the WSJT-X software to lock up or default on the computer.    
Some bands were OK while some were always problematic.   I also found 
that adding a snap-on ferrite at the computer was a big aid in resolving 
the issue.   As of now, I can work 160M - 6M at 500 watts {where 
permitted} all modes with the KPA500 with zero issues.

As to "grounding", or bonding,  I do have and strongly suggest that each 
piece of equipment is bonded or connected by an individual dedicated 
conductor to a common point.  I use the station power supply as the 
common point.   Some say that daisy chain method is preferred, although 
I prefer the star method.   As to a "station ground" to the outside 
world, in some cases the length of the conductor used between the 
station and external ground point becomes an antenna in the presence of 
the transmitted signal, thus forcing the station above RF ground.   In 
my case I only use the AC 3rd pin ground for safety and for all 
equipment. Lightning protection is done outside of the house, hence no 
dedicated "station ground" is employed.    Antennas here use both coax 
fed types and balanced line types.

Good luck with your endeavors.

73

Bob, K4TAX

P.S. - based on your comment........I suggest you not keep or use your 
laptop in the water.   HI  HI



On 7/2/2019 8:05 AM, Bill Weaver wrote:
>    
>   While using my K3 in data A mode with wsjt-x software on 6M, TX stopped, and other data modes also have no TX output. RX remains OK, and CW and SSB TX  &  RX still work OK. Need suggestions on diagnosis or reset process. Direct replies off list are OK. Thanks, Skip W5GAI
> I occasionally have rf get into the laptop and blow it out of the water and everything including the above symptom results. A reboot of the laptop and K3S restart after moving some wires around usually fix it. In my case, better bonding and judicious use of ferrite would cure the problem. I'm still in a "temporary" mode with the station build :-). I'll get there!
>   73
>   Bill WE5P
>