Both Global and Corus (CHED) share the copter. Global monitors 460.1625 Tone 114.8 which is the IFB audio of the television feed plus the directors instructions to the person in the chopper.
The two CHED frequencies are simplex so you may not be hearing the ground to air side of the conversation. I have intended to go by CHED or the airport to listen to these as when the chopper is grounded they are in the same no recieve position as us. The CHED crew does wear AM/FM headphones so they can hear their on air cues.
The only other thing I would try is to listen to the other CHED frequencies in case they use one for air to ground and another for air to chopper.
Good to learn of the 460.1625MHz frequency. I didn't have that one, and was wondering how the IFB got to the chopper. I had guessed they would tune in to the station they were talking to in order to begin speaking at the correct time if there wasn't a dedicated uplink freq to the chopper.
As I mentioned in the post above, I have heard 2 way comms on the 450 freq. Obviously the chopper has the height advantage to get the ground stations a lot more clearly than I can.
Are there any other city-wide IFB freqs that can be picked up in Edmonton?
Back in the days of my sat-zapping I would always be trying to monitor the IFB while watching the live sat feed to the news station. Ah...the good 'ole days!