CraigD wrote an answer about Ortovox F1 Focus Avalanche Beacon on December 14, 2010
Years ago Transceivers sold in the US had a different Frequency form the rest of the world. Now however they have all switched to the international freq. So if you have an old US transceiver it will not be picked up by the new ones. That was awhile ago to it is definatly time to get a new one.