ASR33 Teletype interfacing

I have been attempting to get my ASR33 teletype connected to something and communicating, but so far I have not been successful. I have built the interface here : http://www.daedalus.co.nz/~don/computing/20mahack.html , but it didn't seem to work at all. I connected the teletype to a PC clone running Linux. I set the baud rate to 110 and tested it with a DEC VT100 set to 110 first, to make sure that the PC was communicating over the serial port properly. Then, I plugged in the teletype in place of the terminal with the little kludged adapter, crossed my fingers and turned to knob to the left. The teletype just rattled, not printing anything, and nothing from the keyboard printed either. Then, I turned the knob to the right. The teletype works fine, just as it had before. I can type on the paper, punch tape, etc. Before, when I was just testing the teletype without connecting it to anything, I got the exact same results - with the knob to the left, it just rattles, almost like "Break" is held down. When the knob is turned to the right, it works like a very heavy, loud, electric typewriter, and I can punch tape. On my teletype, the knob isn't labeled, but I am assuming that the knob must be Line/Off/Local. Does anyone have any ideas on how I can get this to talk to something? I don't know a lot about teletypes, but I downloaded the wiring diagrams from pdp8.net, and have been trying to figure it out. I think I am connecting it to the correct terminals on the barrier strip, based on what the wiring diagrams say, but then again, I might have something wrong. One problem is that I don't know what the Teletype is _supposed_ to do. I have never seen one operational, so I don't know if the constant rattleing if not connected is normal or not. There might be something wrong with it that I don't know, but chances are, it's just something I am doing wrong. I got suggestions to try using an old Apple Serial card, or an original IBM XT card to connect the teletype to, but I have neither. I have several Super Serial Card II's, as well as several early clone XT serial cards, but I don't think that they will work. At this point, I don't really care what I connect the teletype to, I would just like to get it to do something, and verify that it works. Eventually, I would like to build an RS232 adapter that would allow me to use the teletype on PC clone hardware, Pr1me hardware, whatever. I understand that the teletype uses a 20mA current loop, but I'm afraid that I don't really know anything about current loop technology. Anyone have some schematics for a true 20mA to RS232 adapter? Something tells me that this little kludge I found on the 'net probably isn't the best or most reliable way to do this. Any help would be greatly appreciated. Thanks! Ian Primus ian_primus(a)yahoo.com