[Elecraft] k2/100 + rtty

[VR2BrettGraham]

W1CG replied to PA3EWP:

>I use MMTTY with N1MM Logger on RTTY and it works very well.  I use the
>normal filters I have set up for PSK31.  They are centered at 1000 Hz, so I
>adjust the frequency in MMTTY to be centered in these filters.   It works
>out to be 915/1085 Hz.  One of the filters is 500 Hz wide, so I use that,
>or else the next wider one.  I have the DSP filters centered at  the same
>audio frequencies and the same bandwidth as the xtal filters, and they work
>well too.  If I try to use 2125/2295, they are way out of range of the K2
>audio spectrum.  You can readjust the K2 filters if you want to use
>2125\2295 but you may have trouble getting that high frequency, but I see
>no reason to not use 915/1085.  There are no spurious responses if you
>operate in the linear mode.

I think my BFO range exceeds anything anyone has mentioned here &
certainly met whatever was intended by Elecraft, but I find it's impossible to
place the filter passband in the right place with traditional mark/space 
"high" tones
in DIG-reverse mode (which sets things right for operation on 18 Mc & below) if
one wants a narrow filter...

Changing mark/space tones on some TUs & TNCs is a non-starter - just changing
TUs/TNCs here will require a change of operator.  As noted by AB7R, if one is
using MMRTTY, turn off the AFC.  For folks outside NA - especially in EU -
remember that the K2 wasn't meant for the "low" tone pair you are used to.

If anyone has any ideas on how one might always remember to "flip" the TU/TNC
with "high" tones to get around DIG-reverse in the heat a contest at 0-dark:30,
I'd be happy to hear from you.  ;^)

73, VR2BrettGraham