[Elecraft] [K3] Need help with soundcard digital mode transmit (retry)

[Don Wilhelm]

  Don,

Do you have VOX turned ON for DATA A?  It is off by default and you have 
to turn it on explicitly.
Use the LINE IN on the K3 and you should be able to set the level so you 
have 4 bars on the ALC meter.  That level should trip the VOX easily.

If you prefer to operate with PTT instead of VOX, you can set the K3 
CONFIG PTT--KEY menu to either RTS-off or DTR-off whichever one is used 
by your software application.  If you choose that route, you will have 
to connect a cable between the K3 and a USB to serial adapter (I don't 
think the MAC has any real serial ports).

One caution on using PTT (at least Windows has this situation) -- when 
the computer is started, it activates the signals in the serial port.  
If your K3 is on, it will be put into transmit for the duration of that 
computer test.
Usually that is no harm, but be forewarned so you will not be surprised.

73,
Don W3FPR

On 6/9/2011 1:03 PM, Don Putnick wrote:
> Hi all,
>
> I'm the proud new papa of Elecraft K3 #5495. I've been able to receive PSK31 via both the rear line-out and the rear speaker jacks. The line-out jack appears to be at a fixed level, which is a little low, but the rear speaker jack with volume control works just fine (that's the approach I used on my Yaesu FT-890).
>
> The problem is I can't get my MacBook to work with the VOX. I've tried the rear line-in and the rear mic jacks, VOX Gain and LOW/HI MIC gain, all in DATA A. Haven't tried USB mode though. And yes, the MacBook is putting out a PSK31 signal.
>