[Elecraft] K3 Question: AFSK-A or DATA-A for RTTY?

[Jim Brown]

On Mon,9/15/2014 8:46 PM, Don Wilhelm wrote:
> Yes, the AFSK A data submode is optimized for RTTY operation.  The 
> default sideband is LSB and the use of the dual filter is possible. 
> Furthermore, the K3 dial display shows the mark frequency.
> If you are using an RTTY mode with an application such as MMTTY, you 
> will find the AFSK A mode useful and tuning will be done using the K3 
> VFO.

Yes, AFSK A is the way to go, and it works very well with VOX! Note also 
that in the last year or two, "authorities" say the dual passband and 
narrow filters are a bad idea, and recommend 400 Hz bandwidth IF. The 
problem with dual passband and narrow filters is phase shift, which 
degrades decoding. Many top RTTY contesters have taken that advice.

73, Jim K9YC