To Don W3FPR, From Howard 4x1zz, Tnx for your explanation concerning connecting Fldigi and the K3s's USB Audio Codec soundcard, it certainly simplified the matter. I did manage to get it working just before receiving your response and now with your explanation I reread past forum discussions and various manuals and put certain doubts to rest. The USB Audio Codec showed as an available soundcard… no problem here. My guess is that the driver was previously installed when I used the K3 Utility's terminal mode (de Elecraft). My problem was solved when I checked off (chose) "PTT via Hamlib command" (under Fldigi Configuration/RIG/Hamlib) AND no other option was checked off. Previously I tried (unsuccessfully) many different combinations of RTS, DTR and VOX settings. Now with the above "PTT via Hamlib command" checked & the PPT-KEY is set to OFF-OFF (under DATA A)… and all is working fine. You did mention that I can use these other PTT options but I will need more of an understanding before implementing these "other" PTT methods. Since my goal was Hellschreiber (Feld Hell) I knew to use DATA A (I've read that compression & TX/RX equalization are turned off in DATA A). I am also aware the DATA A parameters need to be setup for each band. I set the bandwidth wide for receiving. (At a later date I'll experiment with CW and Fldigi, but for now I do not have a use for it… except curiosity). I didn't see that the filters & bandwidth settings defaults to a narrow width (as you mentioned)… I've only experienced the DATA A remembering my last settings… but I'll look out for this. I did not adjust the LINE OUT (LIN OUT) level and kept it at the default setting of NOR 10. There is a warning (in the manual) that levels above 10 might overdrive the soundcard and other bad side effects. With some experience I'll understand better how to monitor the signal using the PC via the proper background/signal color in the FLdigi waterfall that you mentioned. The TX Test mode is a good and convenient feature, I've used it during this setup and in the past. I set the soundcard's output level, via the computer so that the ALC level showed 4 bars with the fifth flickering… the level happened to be 75%. Yes, if a cable is plugged into the LINE IN jack on the back of the K3S, the K3S's soundcard will not see the USB's input, even if opposite end of the cable is not attached to the computer. I made my first QSO on this mode, FELD HELL (Hellschreiber), to Canada (14.074 MHz)… exciting is an understatement! Thank you DON, W3FPR for assistance, patience, valuable time and kindness. Sincerely, Howard 4x1zz
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