[Elecraft] K3S Computer Audio Question with Sub RX installed

[Richard Ferch]

Fldigi versions since 3.22.06 have the capability of decoding from 
either the left or the right channel of a sound card. You can use a 
command-line argument to tell fldigi which configuration files to use 
You would run two instances of fldigi with different configuration 
files, one configured to use the left channel of a sound card on receive 
and the other configured to use the right channel of the same sound 
card. With this kind of setup there is no need for two sound cards.

Programs like MMTTY that store their configuration information in a file 
in the program directory can also be used for dual receive. Simply set 
up two separate copies of the program in different directories, and then 
configure them to use the left and right channels of the sound card 
respectively.

For basic dual RX receive that's all you need. Rig control and transmit 
capability add complications that depend on the specific hardware and 
software you are using. Note that if you want to be able to transmit on 
the VFO B frequency, both receivers must be in the same band. This is a 
transceiver limitation - the K3/K3S will not do cross-band transmit.

73,
Rich VE3KI


AE6JV wrote:

> You need a way to separately decode both the left and right
> audio channels. I use cocoaModem on the Mac to decode two RTTY
> signals. Usually that's the DX and the pileup. I think there are
> also some windows programs which will do this dual decode. Are
> there any Linux programs which will do it? I can't find out how
> to do it with fldigi.
>
> For maximum flexibility, you will need two sound cards assigned
> to two separate programs.