[Elecraft] K3: DVR open ground problem

[Greg - AB7R]

Hi Matt.  I used the DVR controlled by N1MM in the last NAQP phone contest and it 
worked and sounded fine.  

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Fri Sep 25 11:04 , Matt Zilmer  sent:

>K3 #24 was upgraded to include the DVR earlier this year.  It worked
>fine while testing just after installation and configuring.
>
>I used the DVR a few times for contesting, but not much recently.  I
>noticed recently that any recording I make has the hum of an open mic
>(ground or shield?) superimposed on the voice signal.  Seems like
>there might be a bad connection, but looking at the schematic this
>makes no sense - to have this problem with the DVR only.  The audio
>straight  from the mic should have this problem as well.  The mic
>audio is fine though.
>
>Anyone have experience with a problem like this?  I will do the usual
>- uninstalling, re-installing (reseating the connector), but since the
>mic signal at the connector is digital I don't think this will help.
>
>All ideas appreciated.
>
>73,
>matt W6NIA
>K3 #24
>K2 #2810
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