[greg700]

Can't speak for what would have to be done equipment-wise in order to handle multiple sets transmitting on different frequencies simultaneously without burning out any other radio plugged into the same antenna, but any antenna should be able to transmit multiple frequencies simultaneously. The antenna will transmit the two signals combined. It's just a matter of how resonant each freq. is for the given antenna. All the receiving radio is going to do is deconvolve the signal using a fourier transform...which they already do....in order to isolate the frequency they are looking for. As far as a listening radio is concerned, it doesn't matter where the *extra* frequencies that are being transmitted come from...might as well be the FM station down the street because the radio is still going to filter them out.

I don't see how you could receive on the same antenna that is actively transmitting without burning out your receiver though.