[Elecraft] Two instances of WSJT on K3s with SubRX?

Joe Subich, W4TV lists at subich.com
Mon Jun 8 20:31:14 EDT 2020


Giving this "problem" some additional thought ...

WSJTX can not select "SPLIT" to transmit on VFO B in order to
automatically work a station heard on the Sub RX.  However,
here is a starting point for the rest of the configuration ...

For the Main RX (VFO A):
    Set Rig to Elecraft K3/K3S
    Set Mode to Data/PKT (DATA_A)
    Set Split Operation to either None or Fake It
        (Fake it probably works best if you have a wide filter)
    Use an interface that allows RTS or DTR on a dedicated
         serial port for PTT
    Audio (RX) USB Audio CODEC <LEFT>
    Audio (TX) USB Audio CODEC <LEFT>

For the Sub RX (VFO B)
    Set rig to *NONE*
    Set Mode to *NONE*
    Set Split Operation to *NONE*
    Use a *Separate serial port* for PTT (DTR or RTS)
    Audio (RX) USB Audio CODEC <RIGHT>
    Audio (TX) USB Audio CODEC <LEFT>

Notes: Sub RX receive bandwidth will probably be limited
          to 200-2600 Hz (depending on the widest filter
          installed in the Sub Rx)
        Since the VFO B transmit will be "fixed", TX
          offsets will be limited to 300-2600 Hz.  Try
          to stay above 1,000 Hz.
        You will need to manually activate "Split" (TX on
          VFO B) to call a station copied on the second
          instance of WSJTX.
        *DISABLE* "Auto Seq" on *BOTH* instances.  You do
          not want one instance to "take off" on a new
          QSO while working someone else.

73,

    ... Joe, W4TV

On 2020-06-08 8:10 PM, Joe Subich, W4TV wrote:
> 
> Since WSJTX does not understand the concept of a second receiver there
> is no way to provide CAT control for the Sub RX or transmit on VFO B
> as if it were a separate rig.
> 
> However, you can start a second instance of WSJTX to receive on the
> Sub RX - start WSJTX with the --rig command line argument (see the
> WSJTX Users Manual sec. 16.5).  You will probably also want to
> specify a special configuration for the Sub RX that sets the RX
> Soundcard to "USB Audio CODEC" <RIGHT> so it is listening to the
> correct receiver.  Specifying a start-up configuration is done with
> the --config<configuration-name> command line switch (WSJTX Users Guide
> sec 10.1.3)
> 
> As the developers of WSJTX are fond of saying - "Study the On-Line
> Users Guide!"
> 
> 73,
> 
>     ... Joe, W4TV
> 
> 
> On 2020-06-08 4:23 PM, Jim Miller wrote:
>> Has anyone run two instances of WSJT on a single K3s with the SubRX so as
>> to be able to monitor both 50.323 and 50.313?
>>
>> Of course I'll only be able to transmit on the instance that has the Main
>> RX but it would be handy to be able to see both.
>>
>> Thanks
>>
>> Jim ab3cv
> 


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