> > If we ran a wire from the transmitter antenna through an air line that > > has to go to the underwater unit and connected it to the receiver > > antenna, would that work? You'd actually have to attenuate the signal significantly, and it would be best to use shielded cable, but YES, this will work. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist