Hi everyone; I have an Icom-706 (the original one, not the MkII/pro). I would like to get into some digital modes. PSK-31 seems interesting and would like to try RTTY as well. Firstly interested in keyboard-to-keyboard, would like to investigate store-and-forward packet stuff later. My problem is I have no idea where to start. It seems there's several ways to interface to the '706 and I don't know the pros and cons of each. There seems to be a direct digital RTTY input on this radio. Wouldn't this be the easiest/best cleanest method (for RTTY at least)? Does it expect serial input? I think I understand that the CI-V control allows you to change things like frequency and mode from the computer. Since I have the radio right in front of me, I don't think I need that. However, if it could be used to automatically set functions in the radio (for example, if a program relies on VOX operation instead of keying the PTT, or if it needs to change to a narrow filter, it would be nice if that happened automatically over the interface). I have seen some soundcard based software, but it seems there are several around that have stopped support and may be for anything from Windows 95 to Windows 8. I've seen USB interfaces but am not sure how to connect them to the radio or what software to use with them. Some older designs use a COM port which newer computers don't have (though there are USB<->Serial adapters). I just stumbled upon two other interfaces, the Signalink which uses USB and Wolphi-Link which interfaces with a TRRS plug to an Android device. It's not too expensive and runs on a small tablet, which seems perfect, but unfortunately it doesn't work with the first gen Nexus 7 (which is what I have). Interfacing with a tablet or phone seems like a good idea because they are small and light and don't require messing with old technology like a serial port. It would lend itself well to portable operation. I'm good at soldering and kit-building but would prefer buying something cheap and off-the-shelf if possible. If there's a compelling benefit to a kit or DIY circuit, I'd check it out. I guess what I am saying is there are too many choices and I have no idea in which direction to go. Is there a webpage that compares and contrasts the various options?