[Elecraft] K3 line-input question

[Julian, G4ILO]

K2QI wrote:
> 
> Hello Elecrafters,
> 
> Quick question - what could have changed in this scenario?
> 
> Using K3 in DATA-A mode; audio from DM780 going into K3 via rear audio
> input
> connector.  The K3's input was set to LINE IN in the main menu.  Volume
> from
> the PC was set to 50%, and as such a PSK-31 signal was registering about 6
> bars ALC with line input gain set to 14.
> 
> After a while of operating without issue, the waterfall turned into a
> solid
> signal; as if the line audio output of the K3 had locked up.  I had to
> switch modes on the K3 to get the waterfall back to normal.  After that,
> without any change to the PC output volume or K3 mic gain, transmissions
> now
> registered about 3 bars on the ALC meter.  I had to turn the mic gain up
> to
> about 20-21 to reach the same level of input as before.  I checked the all
> volume input and output settings, and they're the same as before.  I also
> went through and checked the relevant FW settings and nothing had been
> modified.
> 
> I'm using FW 3.24(D), which I believe was only issued to a very few number
> of testers so I can't go into FW details.  I've CC'd Lyle in case this may
> be FW issue.  However, I'd just like to find out from the group if
> anything
> similar has occurred to others or been reported.
> All suggestions welcome.
> 
> 

I'm not sure what you mean by "the waterfall turned into a solid signal".
Did it go black, i.e. dead? One thing that springs to mind is an unreliable
connection. Try waggling the cables around. I can't think of a software
reason for what happened.

By the way you don't need 6 bars on the ALC indication. 4 to 5 is
sufficient. Not that I imagine it has any bearing on the reported problem.

-----
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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