[Elecraft] WSJT-X and K3S Tx

[Kevin]

Both Rich and Don have given good advice.

Make sure the U7 or onboard NVIDIA sound device is set as default so you 
don't broadcast windows sounds. Make sure the USB Audio Codec Speaker 
and Mic are enabled but not set as default. In the WSJT software select 
the USB Audio Codec as the sound device for line in (Microphone) and 
line out (Speaker) respectively. Set mic gain levels on the K3s so you 
get four solid bars and an occasional flicker of the fifth on the ALC 
when transmitting. Set the K3s line in level to achieve a medium blue 
background on the waterfall. Use the K3s power control to adjust output 
power.

I'm not quite sure what the tune function in the software is about. What 
does the K3s SWR meter say? Is the tune button in the software supposed 
to kick the K3s into transmit and not doing it? The tune button on the 
K3s only controls the internal tuner or the outboard KAT500 and neither 
will "tune" unless a certain SWR threshold is met.

If you're transmitting signals and receiving them and neither is over 
driven quit messing with it.


On 9/18/2016 9:20 AM, Richard Ferch wrote:
> 1. The U7 is not on COM3. Sound cards do not use serial ports. Perhaps COM3
> is a virtual COM port created by LP-Bridge, or perhaps COM3 is the K3S's
> USB serial port, and COM7 is a virtual port created by LP-Bridge that you
> connect other software to. You need to get this straight for other reasons,
> but it has nothing to do with the audio issues with WSJT-X
>
> 2. Your default sound devices should be set to the motherboard sound card.
> That is where Windows sounds are sent, YouTube audio and other media player
> stuff goes, etc., and you don't want any of that stuff going to the sound
> card(s) you use for radio, much less to the sound card you use with LP-PAN.
>
> 3. In WSJT-X, in the File > Settings menu under the Audio tab, set the
> Input and Output sound cards to the ones you are using for sound card modes
> - most likely the USB Audio CODEC in the K3S, unless you have chosen to
> bypass it and use an external sound card plugged into the Line In jack on
> the K3S, which disables the K3S's internal sound card. If you are using the
> U7 with LP-PAN for panadapter software, it is *not* the sound card you are
> using for sound card modes, and it should *not* be connected to the K3S's
> Line In jack - it should be connected directly to the LP-PAN. In that case,
> WSJT-X should be set to use the USB AUDIO CODEC and there should be nothing
> connected to the K3S's Line In jack.
>
> 4. The ATU on the K3S is not triggered by a transmitted signal, whether
> from WSJT-X or elsewhere. It is not auto-tune in that sense; it is
> auto-tuning based on frequency memories, which is what the KAT500 calls MAN
> mode. It will automatically switch to the last setting used on that band
> segment with that antenna output (ANT1 or ANT2). Once you have tuned the
> ATU once with your antenna for a particular frequency, that should be good
> enough from then on. If your antenna's SWR changes dramatically because of
> weather conditions, e.g. ice on the antenna, you tune the K3S's ATU using
> the ATU TUNE button on the K3S. Therefore an extra 2-second tune signal
> between band hops does not do anything useful, other than give you a
> 2-second advance notice of the SWR.
>
> 5. When the K3S's meter is in ALC mode, it does not show the transmitted
> power. You have to put it into PWR mode with the METER button. The TUNE
> button switches from ALC to PWR mode automatically, but transmitting
> normally does not do this.
>
> 73,
> Rich VE3KI
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-- 
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441


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