[Elecraft] KX3 digital 0ps?

[rich hurd WC3T]

Just as a point of reference, I bought a SL and later bought "cheapie"
sound card dongles.   I never got the dongles to work despite repeated
efforts.   The SL worked every time.  I now have two.  One for home use and
one for mobile.

On Mon, May 4, 2020 at 3:13 PM Bill Frantz <frantz at pwpconsult.com> wrote:

> There are 3 kinds of digital operation you might want to use:
> wsjt-modes (FT8, FT4 etc.), RTTY, and "Sound card modes" (PSK,
> Olivia etc.). The setup for all of them is similar.
>
> For sound cards (useful in all 3 kinds) a cheap USB "sound card"
> is all you need. I started with a SignaLink years ago, but now I
> have a cheapie I impulse bought from Amazon more recently for
> about $5. The "headphone" output will drive the Mic input of the
> KX3 nicely with a 3.5mm to 3.5mm stereo cable.
>
> For driving the sound card Mic input from the headphone output
> of the KX3, I found I needed a pad to reduce the drive. I have a
> 47K resistor in series with the line from the KX3 Phones jack
> and the tip of the plug which goes into the sound card, and a 1K
> resistor between the tip and the sleeve. These resistors fit in
> a 3.5mm plug. The values were based on what I could find in my
> junque box.
>
>
> For the wsjt-modes, it is best to have CAT control of the radio
> from the computer. For the KX3, the USB to 3.5mm plug used for
> updating the firmware is all the hardware you need. Then wsjt-x
> will set your radio correctly when you select the band in the software.
>
> For RTTY, if you are good with CW and a paddle, you can do the
> whole thing with the KX3. Depending on your computer software,
> you can also treat it like any other sound card mode. Or your
> software can depend on the KX3 encoder/decoder and use CAT
> commands for sending and receiving. Most people doing RTTY from
> a computer like to use the AFSK or FSK modes.
>
>
> For the other sound card modes, use DATA A, and either use the
> CAT interface to key the radio for transmission, or use VOX on
> the radio.
>
>
> Getting your computer software connected to these hardware
> interfaces depends on which OS you are using. I use a Mac, which
> just means selecting the correct interface in the setup menus in
> the programs. I have heard complaints from the Windows users
> that software updates make it necessary to redo these
> connections. I haven't tried the Linux world.
>
>
> Getting the sound levels set correctly is another issue, since
> there are frequently as many as 4 (computer program, OS, sound
> card, and KX3) level controls. On reception, try setting
> everything about the middle of the range, and then aim for the
> highest level that won't overload the A/D converter in your
> sound card. This setting is straight forward in wsjt-x.
>
> For output, again try to set everything to about the middle of
> the range and then set things so the ALC indicator is showing 4
> bars with the 5th one flashing. One gotcha is that when severely
> overdriven, the KX3 will show 0 signal rather than maximum, so
> if you're having problems, start low and work up.
>
> Good luck at Gitmo and maybe we'll see you on the air.
>
> 73 Bill AE6JV
>
> On 5/4/20 at 12:21 PM, w1srradio at gmail.com (MIKE W1SRR) wrote:
>
> >so rookie question as I just got my KX3 in time for mobilization (my call
> >sign will be KG4MA, wink wink)  I want to setup my KX3 for
> FT8/FT4/JT9/JT65.
> >
> >Will have a brand new laptop and of course my radio what all are you using
> >for sound cards and settings on the KX3 and WSJT?
> >
> >If all possible I would like to get a Raspberry Pi computer to lighten the
> >load a bit, is that possible?
> >
> >Thanks in advance
> >
> >Future KG4MA (in mid june)
> >Mike
> ---------------------------------------------------------------------------
> Bill Frantz        | If you want total security, go to prison.
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> 408-348-7900       | fed, clothed, given medical care and so on.
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>
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-- 
72,
Rich Hurd / WC3T / DMR: 3142737
Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
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