[Elecraft] k2/100 + rtty

[Julian, G4ILO]

I presume you're referring to an analog RTTY modem such as I recall using 
back in the late 80s? I forget what frequency tones it used. You need a 
computer anyway, so why not just use a sound card program, which isn't 
fussy what the tone frequency is, then you can use a filter center 
frequency that's optimized for the K2? The K2 doesn't support FSK, so 
you've got to use audio in for transmit in any case. I would also have 
thought that modern DSP techniques would do a better job of picking a weak 
signal out of the noise than an analog TU.

73,
--
Julian, G4ILO. (RSGB, ARRL, G-QRP, K2 #392)
G4ILO's Shack: http://www.qsl.net/g4ilo

VR2BrettGraham <vr2bg@harts.org.hk> wrote:

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.