[Elecraft] PSK31 KX3 Elmer needed!

[Don Wilhelm]

Dave,

It sounds like you are being frustrated by all the choices available.  
If you want to end up with Fldigi, I suggest you start with that 
application.  It is multi-platform and will work the same on a PC or a Mac.

The first thing you need to get a grasp on is the audio levels involved. 
That does require you to have some familiarity with the PC or Mac that 
you are using and its soundcard input/output levels.

Usually, one takes the computer audio output from the Line out jack (the 
green one).  That will be fed to the KX3 MIC input, but the level is 
about 100 times too high, so an attenuator is needed. Usually a 100 K 
resistor in series with the Line out signal and a 10k resistor on the 
KX3 side will do the job.

On the other direction, the KX3 headphone output will provide the audio 
to the computer.  This will be fed to the computer Line In or lacking 
that the Mic Input.  Again an attenuator will be required. If you are 
using the computer Line In level, a 10k resistor in series with the KX33 
headphone output and a 10k resistor across the line on the computer side 
will do nicely, but if you are using the computer mic input, the series 
resistor should be increased to 10k.

If you are dealing with stereo inputs and outputs on the computer, the 
normal applications will only use the left channel which is the 
connection to the tip of the soundcard jack.

That should get you started.  As far as Fldigi is concerned, I would 
suggest using RigCAT and selecting the K3 as the rig in the pulldown 
menu.  Use PTT thru RigCAT and it should work.

73,
Don W3FPR

On 7/17/2013 6:10 PM, Esquer Dave wrote:
> Hi folks,
> HF Newbie frustrated with PSK-31 setup on my new KX3. I have tried everything with no joy. I need an ELMER! I've tried so many permutations that all of my hair has fallen out!
>
> I have PC and Mac laptops, Digipan 2.0, Fldigi, PSKer (for iPad) and am missing ALL of the basic setup knowledge to get this stuff working. I've played all the Youtube videos too, especially KD0BIK's, but I'm still stuck in the basic hardware and software setup.
>
> I would like to first try PC Digipan, but am open to anything.
>
> Somewhere, there must be a simple step-by-step setup recipe to interface the KX3, its microphone and headphone cables and the mic input, headphone output from the computer. I also have a Griffin iMic that I've attempted to throw into the mix, again with no joy.
>
> I've read the Data Modes section in the manual and Chapter 7 Digital Modes of the Fred Cady book. They just add to my confusion.
>
> Looking at the Fred Cady book, Figure 7.4 and 7.5 and Chapter 7 sections 7.4 (107-108) and 7.7 (121-122), ALL remain a mystery to me, which hookup do I use?
>
> My assumptions so far:
> Low power, 5 watts or less
> I need to put the KX3 into Data A mode, not PSK-D
> I can interface the KX3 to the computer without the iMic or other external sound card (figure 7.5 of Fred's book)? (Should/how/why do I use the iMic?)
> I need to set the MIC BTN to OFF
>
> I would eventually like to end up with PSK31 working on my Mac (with Fldigi), but I'd like to get it working on the PC laptop first to help me understand all of its nuances.
>
> Arghhh … please help a newbie!
> 73,
> Dave, K6WDE
> dave.esquer at gmail.com
>
>
>
>
>
>
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