Plus, (and I'm bias of course) it will give folks a much better understanding of how the pieces fit together. It's focused on the FSK setup of a K3/K3S. (as in almost 2 hours of detail) It's been a pretty popular video any time there is an RTTY contest that rolls around. Hi Jim, in 2018 I made a very detailed YouTube video that covers everything you are looking for. I would choose the latest version, 21.03a It's a 5-year old but pretty powerful Thinkpad (i7 and 16GB) with an external monitor to provide more screen real estate. This allows me to do SO2R with both radios on the same computer.
I'm using 2Tone as my Primary RTTY software (that is, I transmit through it, using MMTTY only for receive in a second window, because I do SO2R, and MMTTY is mono output only. Among other things, there's no need to mess with editing. Many serious RTTY contesters run both programs, with multiple decode screens, because it's quite common for either of them to decode signals that the other misses. It's possible for RTTY and other digital modes to be decoded via the built-in mic picking up sound from the radio's speaker, which may be selected by default, so it's important to make sure you're set to the K3S USB.īTW - 2Tone is an awfully nice RTTY interface, is MUCH simpler than MMTTY, is an excellent decoder, and accepts stereo inputs and outputs.
It must be selected in Windows as input and output for MMTTY. I suspect that it is capable of PTT and rig control as well as audio. The K3S has a built-in USB audio interface, and I don't know anything about setup using it. They are Mmtty.ini and USERPARA.ini In Notepad, search for DefMarkFreq=2.125000e+03 and replace 2.125000e+3 with 9.15000e+2 and save them with their original filenames and extension. All of them have high tones as default, so they must be edited in a simple text editor (like Notepad in Windows).
ini files that include those tone frequencies.
I prefer to use low audio tones (less fatiguing, makes it easier to tune in stations by ear), and one major gotcha in MMTTY is that there are two. The stuff that must be adjusted are baud rate RS-232 (computer and radio must match, I think I use 38,400), RTTY baud rate and tone frequencies, audio level and VOX gain. This means that I need only interface for rig control. I use a Tascam US100 USB-connected audio interface. That includes playback of SSB messages, RTTY, and WSJT modes. I have the K3s audio selected for Data-A, AFSK, 45.45 bps, but need advise about the rest of the items.I run all computer-assisted operation of my K3 (original, not -S) feeding the line input with VOX for PTT.