[Elecraft] Data modes issue

[Don Wilhelm]

  Jim,

Are you getting enough audio into the K3?  Set the K3 to TX TEST and 
look at the ALC bargraph.  You should have 4 bars lighting solid with 
the 5th bar possibly blinking.
If you are not seeing that indication on the ALC meter in the K3, you 
are not driving the Line-in with enough audio.

The K3 "ALC" meter is also a "VU" meter on the lower part of the scale.  
Indication below 5 bars indicate no ALC is being generated - ALC action 
begins with the 5th bar.  So if you followed the old advice that you 
should not have any ALC indication for DATA modes, that old advice must 
be modified for the K3.

The K3 Line-in expects to see line level signals.  If you are using an 
external interface, some by default use microphone level for the output 
and you must change a jumper in the box to bring it up to line level.

73,
Don W3FPR

On 1/8/2011 1:47 PM, Jim Littlefield wrote:
> Just got my new K3 and everything is great about it except, sound card
> data modes (PSK31, etc.) are not working. I put the radio in Data A
> mode. When I transmit, the rig is keyed, I can hear audio via the
> monitor function, but nothing is transmitted. I have tried cranking the
> Mic gain (actually the line in gain) way up, but that doesn't help. I
> have also confirmed the transmitter is not in test mode.
>
> Any suggestions?
>