The signal will interfere with any signal at the same frequency.

That said, your transmitter is more likely to be transfered with, as it has a much lower power rating than say a comms mast.

If you are going to fly and can't gaurantee that there is a frequency set aside then PCM is pretty much a must.

Also make sure the military / police etc don't transmit on anything even close to what you're going to buy, even over here they go mental about people messing with their frequencies.

What kind of penalties are there for flying helis over there.

Russ