I'm guessing the original poster is not in the US; most of the rest of the world has 220V from line to ground.
The Lynx RX/TX uses an external wall-wart power supply. The one supplied is transformer-based and will only run on 120V. If you are in 220V-land, all you need to do is replace the wallwart with one that runs on 220V. You need one with a center-positive 5.5mm OD/2.1mm ID barrel plug on the cable, and 300mA or more DC output. The Triad one spec'ed is a nominal 6V DC output, but given the regulator in the TX/RX, must output at least 7.5V DC under the normal load of the TX/RX. Something like WSU075-1000 with the appropriate adapter for the AC plug should work (but I haven't tried it myself). Or just look around for a surplus 6V transformer-based (heavier) or 7.5V switching (lighter) one.
/mike