Jack,

The advantage to using DATA A mode is that the compression is set to 
zero and the Equalization is turned off.  If you are also using SSB and 
have compression set for SSB and/or are using equalization for normal 
(speech) SSB mode, then it will be an advantage for you to use DATA A 
instead of SSB.  If you never use a microphone with the K3, then you 
will find no difference.

73,
Don W3FPR

W4GRJ wrote:
> I use an external soundcard/interface "Navigator". My main use is passing
> traffic on MARS via MT-63 and MFSK-16. I just leave the radio in USB and set
> the mode freq via HRD DM-780. Everything works great, my question .... is
> there any advantage to switching the radio to Data Mode?
>
> Jack
> W4GRJ / AFA4DG
>   
>
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