[Elecraft] Problem with Test TX Data and ALC

[Carl Jón Denbow]

I've been trying to set up my data modes using a SignaLink USB, which 
I've used with good results with my KX3, with my K3.  I do have the 
correct K3 jumper board in the SL.  I also have the SignaLink supplied 
cables hooked up correctly.  I can monitor digital signals just fine.  I 
can not get any TX audio actually transmitted, though Windows indicates 
that the USB Codec Speaker is getting plenty of audio on TX.  I've tried 
to use the Test TX DATA routine within the K3 and get no ALC even when 
Windows indicates that that line has full bore audio.  I'm probably 
doing something rather simple wrong here, but I can't for the life of me 
figure out what it might be.  In terms of experience, I'm an old hand at 
digital modes having run them on numerous rigs, with various computers 
and external sound card combinations over a number of years.  I'm, 
however, very new to the K3 as I just purchased it used at Dayton this 
year, and I'm just now trying to hook it up for digital modes.  Thanks 
for any help you can give.  73 de Carl, N8VZ