[Elecraft] Strange "Ticking" sound with K3/0 Mini to RemoteRig for remotely controlling K3.

[Ken Roberson via Elecraft]

It's the K3 Clock - 73 Ken K5DNL
 

     On Sunday, October 5, 2014 5:19 PM, K4ia via Elecraft <elecraft at mailman.qth.net> wrote:
   

 USB or serial port polling?  Try a different adapter or one that uses an optoisolater  

Craig Buck

> On Oct 5, 2014, at 5:36 PM, "Brian F. Wruble" <bwruble at gmail.com> wrote:
> 
> Hi All:
> 
> The symptom I am describing persists despite changing routers, internet
> systems, and cities.  In a QSO this morning, the other parties reported a
> ticking sound on my transmitted signal --- faint but noticeable --- and I
> could also hear it in XMIT Monitor.  I was operating my remote gear as a
> test --- in the same room as the K3, and on the same LAN.
> 
> I have now set myself up 110 miles away, and the sound persists.  I am able
> to work others, get good signal reports, but I can hear the tick tick tick,
> about 2 per second.
> 
> In testing, I find the sound is there even if I power down the gear --- the
> radio and the control end.  It persists if I remove 12VDC from the K3/0
> mini.  Also if I remove the wifi module from the RemoteRig control box.
> 
> If I remove power from the RemoteRig, it goes away.  With power to the RR,
> the ticking goes away if I unplug the "TTL" line from the K3/0 mini.
> Unplugging the other lines makes no difference, though it becomes fainter
> if I unplug "Aux/Mic." It persists if I remove the ethernet cable
> connecting the RemoteRig to my router.  It persists if I unplug the USB
> line from the RemoteRig to my PC.
> 
> This symptom appeared after a good period of time when everything worked.
> And all functionality is still there --- just this maddening tick tick tick
> --- like something from Edgar Allan Poe.
> 
> All ideas gratefully accepted.
> 
> 73 de Brian W3BW
> 
> *Brian F. Wruble, C.F.A.
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