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

[Peter Wollan]

Don,

The CocoaModem web site has some information about connecting, as well
as configuring the software to successfully transmit.  I've used both
CocoaModem and Fldigi, but the connection process is the same:  from
the K2 to the Mac is a simple stereo cable, headphone socket to
headphone socket.  From the Mac to the K2 requires a stereo cable to
8-pin microphone plug, with a couple of resisters as a voltage
divider, soldered in the plug, to convert the line-out voltage level
to mic level.  I think the K3 is the same.

Then, the levels have to be set right at both ends, the radio and the
laptop, to have Vox trigger properly.  Basically, you want to turn it
up high enough to trigger without being too high and having
distortion.

CocoaModem:  homepage.mac.com/chen/w7ay/cocoaModem/index.html, look
under "interfacing".

     Peter W0LLN



On Thu, Jun 9, 2011 at 12:03 PM, Don Putnick <don.putnick at earthlink.net> 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.
>
> I'd really appreciate any helpful hints.
> Thanks and 73, Don NA6Z
>
>
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