Keep in mind that VHF is basically line of sight. I'm not all that far (in terms of miles) from KOLM, but there is terrain in the way. I can hear airborne traffic, but I cannot hear the tower. The only answer, if this were critical to me, would be to use an external antenna mounted as high as possible, rather than the whip attached to the scanner. And even then, I might still have obstructions between my location and the airport. No biggie, the ham rig in my Jeep has air band receive, so I can listen to the ATIS and then KOLM tower and ground while driving to the airport to get a feel for what is going on at that minute.