[Elecraft] Newbie question re digital modes

[mcduffie at ag0n.net]

> 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.

Bingo!  Internal mic.  You need to be sure you shut that off when you wire it
direct.

I did a demo many years ago, when PSK31 was the new guy on the block, where I
had a laptop on one end of the meeting room for our ham club and the receive
audio source on the other end.  It copied perfectly, even with the room
acoustics.

Gary-AG0N