[Elecraft] [KX3] Digital TX issues

[Don Wilhelm]

Gary,

Since you get no ALC bars when the fault occurs, the problem is either 
in your Signalink or the audio input section of the KX3.
It could be as simple as an intermittent audio cable connection or a 
fault in the audio wire.
If you have an audio amplifier available (like one of those used with an 
iPOD or similar), plug the cable that you normally plug into the KX3 and 
see if you have the digital tones coming out of the Signalink and that 
audio cable - you will hear audio only in the left channel, the 
Signalink does not use the right channel.

Since you say FM appears to be working, that sounds like the KX3 mic 
audio is not at fault.

If everything works into a dummy load, check your antenna system to 
determine if the cause may be RF in the shack that is bothering your 
Signalink.

73,
Don W3FPR

On 7/13/2015 12:35 PM, Gary Hawkins wrote:
>
> Thus, I would have to conclude the problem is an intermittent behavior 
> rather than setup issue.  It seems to me the KX3 TX is shutting down 
> in response to some fault condition.  PA temp is well below max, and 
> no other error messages are observed.  Unlike when the unit powers 
> down due to high temp, the power setting remains at 10W.  ALC shows 
> zero bars.
>
> While trying the tune function on WSJT-X after fault condition, I 
> increase mic gain and ALC bars start to briefly show and TX power 
> briefly flickers on power meter.  However, within a second so the ALC 
> bars drop back to zero and so does the power.  Increasing the mic gain 
> again results in similar behavior.
>