[Elecraft] Raspberry Pi, K2 and WSJT-X questions

[Don Wilhelm]

I cannot help with the Raspberry Pi nor the soundcard, but once you get 
that straightened out, I can tell you how to set the transmit soundcard 
audio level for the K2.

We have heard a lot about the K3/K3S, KX3 and KX2 requiring 4 bars with 
the 5th flickering on Transmit audio - this is the No ALC point for 
those radios.

The K2 is the same, but the ALC display in the LED Bargraph of the K2 is 
different.  Any ALC bars indicate ALC action.  So the answer is to 
advance the audio until you see an ALC indication, and then back off a 
bit until it disappears.

Once the audio level is set, the advice for all the Elecraft gear is the 
same, leave the audio level alone and adjust the power output with the 
POWER knob.

You may want to check on Jim Brown's K9YC advice for properly bonding 
computer, soundcard and transceiver.  If not, you may need to use an 
interface box to eliminate hum, buzz, and noise (but Jim's advice is 
better if you implement the whole solution.

73,
Don W3FPR

On 7/5/2017 4:19 PM, James Bennett wrote:
> Hi Jim,
> 
> I can’t give any suggestions / answers regarding the K2 part of the question, but…. I run a KX3 connected to my Raspberry Pi 3 and operate WSJT-X JT65, JT9, and MSK144. Also use FLDIGI, but very, very seldom. I use a Tascam external USB sound card: the US125M model. With WXJT-X up and running, if I select the Preferences->Audio tab, here is what I have:
> 
> Input:    sysdefault: CARD=CODEC   Left
> Output: sysdefault: CARD=CODEC   Mono
> 
> And yes, there a bunch of devices listed in that drop-down, but the above works just fine for me.
> 
> I’m running Raspian Jessie for the OS, and my WSJT-X is a development version: 1.7.1 r7557
> 
> Hope that helps on the audio side.
> 
> 73, Jim / W6JHB
> 
> Jim Bennett
> Folsom, CA
> 
> 
> 
> 
> 
> 
>> On Jul 4, 2017, at 12:58 PM, Lynn W. Taylor, WB6UUT <KX3.1 at ColdRocksHotBrooms.com> wrote:
>>
>> Replies on-list, please.  I'm also interested in the answer, and I'm sure there are others.
>>
>> On 7/3/2017 1:37 PM, Elmore's wrote:
>>> Has anyone figured out how to control a K2 from RPi running WSJT-X (or FLDIGI,etc.)?
>>> Also, has anyone been able to run a digital program using a USB soundcard? I have a Star Tech 7.1 connected to my RPi. At the moment I am trying to get it to work with WSJT-X.
>>> I am running Debian Jessie.
>>> The sound card is recognized by the OS. When I run WSJT-X and select the Audio tab and select the Input drop down, there is a list of 22 sound cards none of which is the USB card. A similar issue exists on the Output selection. I don’t understand what I am seeing. How do I get to see the USB card in WSJT-X?
>>> Note that I have made forum postings on WSPRnet and RPi ham Yahoo groups without yet getting a solution.
>>> I hope someone can help with this very frustrating situation. Also note that this is my first experience with a RPi and my Linux knowledge is limited.
>>> 73,
>>> Jim WA4YWM
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