Yes, you need the 1394 repeater as a stand alone device or built in to the cable. That will work for you. I have run 100' with the repeaters.
I tried using a repeater myself to connect a DVHS and a TV in seperate rooms.
The repeater doesnt seem to be compatible.
What about using a 33 foot 6 Pin/6 Pin cable into powered hubs/repeaters in each room? This may be my next step. I'll pickup 2 Belkin 6 port hub/repeaters and a 33 foot cable as well as 2 3 foot cables. This setup will likely cost ~$130. If it works, it will be a substantial savings over the unibrain repeaters ($450 for 2 sets), but I dont know if a 33 foot cable connected to these hubs will be sufficient?