K3s USB sound card problem

[Mike Dodd]

I'm trying to get my K3s with built-in USB sound card working with MMTTY
in data mode AFSK A. I had this set up and working FB in the past, but
now I can't transmit.

Since the last time I used RTTY, I have installed a KPA500 and KAT500,
with their associated factory cabling. But Elecraft Support says these
have no effect on the USB sound card.

I'm running Windows 8.1 Pro.

I am convinced that audio from an application is not reaching the USB
sound card. In Control Panel I can test the speakers by playing a sound.
If I do this test with the computer speakers, I hear the sound. But if I
test with the USB audio codec, the K3 doesn't go into XMIT (VOX is on),
and there is no indication on the ALC meter.

I have rebooted the PC several times.

The K3 Utility communicates with the K3s, and the Terminal can transmit
in the FSK D mode. But I assume Terminal does not send audio FSK tones,
so it's of no help there.

I have unplugged and re-plugged the USB cable from the Elecraft
equipment to the PC, but this did not solve the problem. Windows Control
Panel says the audio device is working correctly.

But it doesn't receive audio from Windows applications.

Does anyone have any suggestions?

Thank you.

--
73, Mike N4CF
Louisa County, VA USA
Elecraft K-Line: K3s / P3 / KPA500 / KAT500
Carolina Windom up 45'
http://n4cf.mdodd.com
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[Glenn Anderson]

Make sure that you have the K3 sound card selected as the output sound device in MMTTY.
-------- Original message --------From: Mike Dodd <[hidden email]> Date: 7/21/18  09:13  (GMT-06:00) To: [hidden email] Subject: [Elecraft] K3s USB sound card problem
I'm trying to get my K3s with built-in USB sound card working with MMTTY
in data mode AFSK A. I had this set up and working FB in the past, but
now I can't transmit.

Since the last time I used RTTY, I have installed a KPA500 and KAT500,
with their associated factory cabling. But Elecraft Support says these
have no effect on the USB sound card.

I'm running Windows 8.1 Pro.

I am convinced that audio from an application is not reaching the USB
sound card. In Control Panel I can test the speakers by playing a sound.
If I do this test with the computer speakers, I hear the sound. But if I
test with the USB audio codec, the K3 doesn't go into XMIT (VOX is on),
and there is no indication on the ALC meter.

I have rebooted the PC several times.

The K3 Utility communicates with the K3s, and the Terminal can transmit
in the FSK D mode. But I assume Terminal does not send audio FSK tones,
so it's of no help there.

I have unplugged and re-plugged the USB cable from the Elecraft
equipment to the PC, but this did not solve the problem. Windows Control
Panel says the audio device is working correctly.

But it doesn't receive audio from Windows applications.

Does anyone have any suggestions?

Thank you.

--
73, Mike N4CF
Louisa County, VA USA
Elecraft K-Line: K3s / P3 / KPA500 / KAT500
Carolina Windom up 45'
http://n4cf.mdodd.com
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[Richard Ferch-2]

If checking and if necessary correcting the output sound device selection
in MMTTY doesn't solve the problem, here are a few other things to look at:

The Windows sound card level setting on the USB audio codec (playback side)
The K3S's MAIN:MIC SEL setting while in AFSK A (it should be LINE IN)
The K3S's Mic gain setting while in AFSK A
The K3S's MAIN:VOX GN setting while in AFSK A (if you get an indication on
the ALC meter but it doesn't trigger PTT)

73,
Rich VE3KI


WB5TUF wrote:

Make sure that you have the K3 sound card selected as the output sound
device in \
                MMTTY.
-------- Original message --------From: Mike Dodd <[hidden email]> Date:
7/21/18  \
09:13  (GMT-06:00) To: [hidden email] Subject: [Elecraft] K3s USB
sound \
card problem  I'm trying to get my K3s with built-in USB sound card working
with \
MMTTY  in data mode AFSK A. I had this set up and working FB in the past,
but
now I can't transmit.
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[Mike Dodd]

On 7/21/2018 10:23 AM, Glenn Anderson wrote:
> Make sure that you have the K3 sound card selected as the output sound
> device in MMTTY.

Yes. I forgot to mention that. If I select the PC speakers as the output
device and hit TX in MMTTY, I can hear the FSK tones. But if I select
USB Audio Codec as the output device, the tones are not sent to the K3s.

I have done this repeatedly, with the same result -- no audio is
reaching the USB sound card to key the K3's VOX or modulate the transmitter.

--- Mike


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[Joe Subich, W4TV-4]

Do you have anything connected to the "Line In" jack on the K3S?
Doing so will disconnect the output of USB Audio CODEC and substitute
the Line In audio.

73,

    ... Joe, W4TV


On 2018-07-21 10:54 AM, Mike Dodd wrote:

> On 7/21/2018 10:23 AM, Glenn Anderson wrote:
>> Make sure that you have the K3 sound card selected as the output sound
>> device in MMTTY.
>
> Yes. I forgot to mention that. If I select the PC speakers as the output
> device and hit TX in MMTTY, I can hear the FSK tones. But if I select
> USB Audio Codec as the output device, the tones are not sent to the K3s.
>
> I have done this repeatedly, with the same result -- no audio is
> reaching the USB sound card to key the K3's VOX or modulate the
> transmitter.
>
> --- Mike
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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