[Elecraft] Running DM780 with the K3

[Don Wilhelm]

  Mark,

Please explain what you mean by "waterfall display is super messed up" - 
the K3 defaults to a 400 Hz width for DATA A and that would show a 
narrow band on the waterfall until you increase the width.  BTW, DATA A 
is the only one you should use, the other data modes are for RTTY or PSK 
generated by the CW paddles (and may generate very strange waterfall 
displays).

Note also, that if you select the operating band/frequency and mode by 
clicking in DM780/HRD, you may end up in USB mode instead of DATA mode - 
I use the K3 tuning for that reason.  Maybe Simon will fix that someday.

For transmit, make certain you have set the Line-in level so that you 
obtain 4 bars on the ALC display with the 5th bar flickering, then set 
the power with the K3 power control, ignoring the advice in many 
interface boxes to set the power level by controlling the audio level - 
that will not work right with the K3 (nor with the K2).

I believe it is Signalink that normally provides microphone level audio 
to the transceiver, but there is a jumper inside to increase it to line 
level.  To drive the K3 Line-in, you must change the jumper in the 
Signalink.

73,
Don W3FPR

On 12/31/2010 2:23 PM, pastormg2 at verizon.net wrote:
> I am currently using a signalink USB with HRD and DM780.  I have DM780 keying the K3 which is set for PTT vs VOX.  I am trying to transmit PSK31 and the mode set on the K3 is USB vs Data. Not sure if that is correct or not but when I choose the mode Data the waterfall display is super messed up. But when the mode is set to USB it looks perfectly normal.
>
> But, when I hit the transmit button the K3 goes into transmit mode but it looks as if no power is being registered on the meters even though I have the transmit power set at 40 watts.  Am I doing something wrong?  Any help would be appreciated.  Mark KB3Z
>