He said, "K3" and "Serial to USB". There is no audio on the serial port of a K3.

A K3S USB is a different story.

Steve, use the K3 Audio In/Out into the sound card of your computer directly.



On 11/22/2015 1:03 PM, Bob McGraw - K4TAX wrote:
I suggest connecting the radio to the computer via the single USB cable. It handles the audio and the radio commands for CAT control. The SignaLink USB is not needed nor preferred in this case. Configure the FLDIGI application through the various menus in the software for the radio using the HAMLIB menu in the application.

Yep, assuredly he receiver audio was being heard by the mike in the computer.

73
Bob, K4TAX

On 11/22/2015 1:33 PM, Steve via Elecraft wrote:
I think I may just be overcome by  an embarrassment of riches. I have
recently acquired a K3 and  the serial to USB cable to run the utility  program.
  I would like to try digital -- particularly PSK31 -- which I now  do with
IC7000 and Signalink TNC. I have been using FLDIGI satisfactorily.  My
question is whether (1) I should try to run FLDIGI with  my K3 directly through
the RS232/USB cable, (2) should I get the cable and  jumper card for K3 for
the Signalink, (3) should I get the "tridentate"  cable set to connect with
the K3  using the line-in/line-out/ptt  connections on the back?
  An amusing side thing: I had my K3 tuned to 14.070 upper side band and  I
booted up FLDIGI on my laptop with no physical connection between them. To my
  amazement, I saw a waterfall display and, when I placed the cursor on a
nice  strong signal, I saw decoded text. I can only assume that the laptop's
microphone was open and FLDIGI picked it up from the audio output of my
radio.  Alternatively, it may have been an occult message to me that I need to
better  understand the mechanics of digital  :-}
  TNX for any advice especially if I can understand it.  VY 73 de  W3UEC
  Stephen Dubin V.M.D., Ph. D.
Guerir quelquefois, soulager  souvent, consoler toujours.


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