[Elecraft] K3 in data A mode

[Don Wilhelm]

Roger,

That statement does not make a lot of sense - explanation below:

With the K3 (and K3S, KX3 and KX2), there are no specific CW and SSB 
filters - as there is with the K2.
The DSP filter bandwidth is set with the WIDTH/SHIFT (or HI CUT.LO CUT) 
knobs and any roofing filters will switch in and out as the bandwidth is 
changed.  The bandwidth is what you select with the two knobs (stay away 
from the XFIL button).
The default width for AFSK is narrow - but that applies to receive 
only.  Tune in a single RTTY signal with the VFO and look for the decode 
in MMTTY if using it that way.
If you are using a waterfall display, then you would normally set the 
bandwidth to something resembling the SSB bandwidth of 2.7 or 2.8 kHz.  
Set the DSP filter bandwidth according to the method you are using for 
RTTY (either click on a waterfall or tune to the RTTY signal with the 
VFO [when using a narrow bandwidth]).

For RTTY, use AFSK A since you are using the soundcard.  It turns off 
compression and sets the TX and RX EQ to flat automatically. AFSK A 
defaults to LSB which is standard for RTTY.  Your compression and EQ 
settings for SSB will remain the same and there is no need to set them  
to off (flat for EQ) when using DATA modes.

The receive filter width means nothing for transmit, the 2.7 or 2.8 kHz 
filter should be selected for DATA mode transmit.  Use K3 Utility to 
check the filter that you have enabled for transmit in DATA modes - it 
must be the 2.7 or 2.8 kHz filter.

73,
Don W3FPR

On 10/10/2017 6:27 PM, Roger D Johnson wrote:
> I tried it in LSB mode and it works fine! I checked and both the CW 
> and SSB fikters are selected for data mode.
>
>